Arquivo da tag: Mudanças climáticas

Elevação do nível do mar traga várias ilhas do Pacífico (El País)

Mudanças climáticas estão elevando as águas pelo menos desde meados do século XX

MIGUEL ÁNGEL CRIADO

15 MAI 2016 – 00:19 CEST

Desaparecem ilhas do Pacífico:. A imagem aérea mostra a ilha de Nuatambu partida em duas pelas águas. SIMON ALBERT / EL PAÍS VÍDEO

Desta vez não se trata de previsões ameaçadoras para um futuro distante: um grupo de pesquisadores comprovou como em apenas poucas décadas várias ilhas do oceano Pacífico desapareceram sob o mar. Seu estudo conecta as mudanças climáticas mundiais com a elevação do nível do mar em escala local. Uma conexão que tragará muitas outras ilhas e zonas costeiras nas próximas décadas.

Usando imagens aéreas e por satélites obtidas desde 1947, cientistas australianos têm acompanhado a elevação do nível das águas que rodeiam as ilhas Salomão, no meio do Pacífico ocidental. O arquipélago, formado por cerca de 1.000 ilhas que, juntas, mal superam os 28.000 quilômetros quadrados de extensão, é o lar de mais de meio milhão de pessoas. De origem vulcânica, muitas são pequenos pedaços de terra de poucos hectares, quase ao nível do mar. Por isso são um laboratório onde testar os efeitos das mudanças climáticas nas zonas costeiras.

Os registros dendrocronológicos obtidos dos troncos das árvores mostram que o nível do mar se manteve estável nos últimos séculos, somente sujeito a variações temporais pelo impacto de fenômenos climáticos como El Niño. No entanto, esse equilíbrio foi para o espaço nas últimas décadas. Desde meados do século passado o oceano subiu 3 milímetros por ano, uma cifra que se elevou até os 7 milímetros anuais desde 1994.

Cinco pequenas ilhas das Salomão desapareceram e outras seis perderam a maior parte da terra

Com esses dados, os pesquisadores puderam comprovar com imagens o desaparecimento de cinco ilhas. Apesar de que a maior tinha apenas cinco hectares, trata-se de ilhotas com vegetação, vida silvestre e, pelo menos em dois casos, habitadas. Em algumas ainda é possível ver árvores que se afogam com as raízes sob o mar.

O estudo, publicado na Environmental Research Letters, também mostra que outras seis ilhas perderam até 62% de sua terra. Além disso, o ritmo do avanço do mar está ficando mais acelerado. As imagens tomadas do céu demonstram que até os anos 60 as águas arrebataram apenas 0,1% por unidade de área. A porcentagem se elevou até 0,5% anual até 2002 e, a partir daí, explodiu até 1,9%.

“A elevação do nível do mar nas Ilhas Salomão nos últimos 20 anos foi três vezes maior que a média mundial”, diz em uma mensagem o pesquisador da Universidade de Queensland (Austrália), Simon Albert. Embora possa parecer que o nível do mar tenda a ser igual em todo o planeta, há fatores locais que o elevam ou baixam.

No caso das Salomão, “em parte isso se deve ao aumento do nível do mar e, em parte, ao ciclo natural dos ventos alísios que movem a água no Pacífico ocidental”, esclarece o cientista australiano. “Mas, independentemente da combinação de causas, esses resultados nos apresentam uma visão dos impactos da elevação do nível do mar na segunda metade deste século, quando o restante do planeta sofrer um ritmo semelhante ao que experimentaram as Ilhas Salomão nestes 20 anos”, acrescenta Albert.

Comunidades de pescadores tiveram de mudar-se morro acima para distanciar suas casas do mar

O drama está transcorrendo quase ao vivo. Na ilha de Nuatambu, por exemplo, viviam 25 famílias. O mar lhes roubou a metade da terra e, na década atual, arrebatou 11 casas. Em várias ilhas as pessoas já tiveram de mudar-se para as zonas mais altas ou mudar de ilha. Algumas comunidades se fragmentaram, com alguns membros deslocados e outros ainda resistindo.

No artigo que os próprios pesquisadores escrevem em The Conversation está incluído o depoimento de Sirilo Sutaroti, o ancião-chefe que aos 94 anos rege o povo paurata, uma tribo de pescadores: “O mar começou a adentrar, o que nos obrigou a ir morro acima e reconstruir nosso povoado longe do mar”.

Abril é o sétimo mês consecutivo de temperaturas recorde no planeta (O Globo)

Por O Globo. 16/05/2016

 

RIO — Abril deste ano registrou as temperaturas mais quentes para este mês na História, segundo informações da Nasa. É o sétimo mês consecutivo de temperaturas recorde, com mais de 1 grau Celsius de diferença em relação à média entre 1951 e 1980.

A temperatura média global em abril foi 1.11 grau Celsius acima da média do período 1951-1980, esmagando o recorde anterior para o mês, registrado em 2010, de 0,24 grau Celsius acima da média.

— O mais interessante é a escala na qual estamos quebrando os recordes — disse Andy Pitman, da Universidade de Nova Gales do Sul, na Austrália, em entrevista ao “Guardian”. —Claramente, tudo está caminhando na direção errada. Os cientistas climáticos estão alertando sobre isso desde os anos 1980, e tem sido óbvio desde os anos 2000. Então onde está a surpresa?

É o terceiro mês consecutivo em que o recorde de temperatura é quebrado pela maior diferença já registrada. Desde fevereiro, quando as margens começaram a quebrar recordes, os cientistas começaram a falar sobre “emergência climática”. Existe a influência do El Niño, mas o temor é que o planeta esteja aquecendo de forma mais acelerada que o imaginado, o que coloca em risco os objetivos acertados em Paris.

— O alvo de 1.5 grau Celsius é um desejo. Eu não sei se conseguiríamos esse objetivo se parássemos com as emissões hoje. Existe inércia no sistema. E o resultado de abril coloca pressão para os 2 graus Celsius — disse Pitman.

Anthropologies #21: Weather changes people: stretching to encompass material sky dynamics in our ethnography (Savage Minds)

See original text here.

September 24, 2015.

This entry is part 10 of 10 in the Anthropologies #21 series.

Heid Jerstad brings our climate change issue to a close with this thoughtful essay. Jerstad (BA Oxford, MRes SOAS) is writing up her PhD on the effects of weather on peoples lives at the university of Edinburgh. Having done fieldwork in the western Indian Himalayas, she is particularly interested in the range of social and livelihood implications that weather (and thus climate change) has. She is on twitter @entanglednotion –R.A.

For most people, the climate change issue is a bundle of scientific ideas, or maybe a chunk of guilt lurking behind that short haul flight. The words have fused together to form a single stone, immobile and heavy. Change is a bit of a nothing word anyway – anything can change, and who is to say if it is good or bad, drastic or practically unnoticeable?

But what about climate? It is a big science-y word, neither human nor particularly tangible. Climate is about a place – engrained, palimpsested, with time-depth. That big sky, those habits – the Frenchman advising wine and bed on a rainy day, the Croatian judge lenient because there was a hot wind from the Sahara that day. This is weather I am talking about, seasons, years, the heat, damp and sparkling frost.

People care about the weather. We consider ourselves used to this or good at observing that. My home has more weather than other places – it is colder in winter, the air is clearer and brighter – because it is mine. My sunsets – this is eastern Norway – are vibrant and fill the sky, my sky will snow in June with not a cloud, my nose can feel that special tingle when it gets to below -20˚c. The north is not gloomy in winter – the snow is bright white, the hydro-fuelled streetlights illuminate empty streets and windows seal the warmth in.

What is your weather? It would be safe to assume it is part of the climate and I would go out on a limb and say I think you care about it. Am I wrong?

When the weather matters to people, the task becomes one of bridging this caring and the climate change science and projections. Looking at the impact of these weather changes in different areas of life is, then, going to make up a steadily larger part of useful climate change research.

Mead famously convened a conference with Kellogg titled ‘The Atmosphere: Endangered and Endangering’ in 1975, and Douglas published Risk and Blame in 1992. In the new millennium Strauss and Orlove (2003), Crate and Nuttall (2009) and Hastrup and Rubow (2014) brought edited volumes to the debate. It seems to be fairly well established, then, that climate change is a matter for anthropologists, as phrased by the AAA statement on climate change: ‘Climate change is rooted in social institutions and cultural habits. … Climate change is not a natural problem, it is a human problem.’ What then, can anthropologists do, about this problem?

Anthropologists provide description. The mapping of people’s stories of how the weather is ‘going wrong’, stories of change, and of coping and consequences is underway (Crate 2008 described the effects of unusual winter melt on the Vilui Sakha in Siberia, Cruikshank 2005 explored the tendrils of meaning surrounding glaciers between Alaska, British Colombia and the Yukon territory). Linked to the description, of course, and not really disentanglable from it is the explanation. Explanations and understandings of weather and weather changes in the places where they are happening, whether Chesapeake Bay, the Marshall Islands, or Rajasthan, India, fill in the social significance of what had been an empty sky (Paolisso 2003, Rudiak-Gould 2013, Grodzins-Gold 1998). The weather changes, in fact, constitute one of those satisfying areas of inquiry which concern those asked as much as the anthropologist.

The question of knowledge, however, can still seem a barrier when climate scientists are those with a mandate to understand changing weather. Anna Tsing, in the Firth Lecture at the Association of Social Anthropologists of the UK and Commonwealth’s (ASA) 2015 conference in Exeter, brought the contextual ecological study of mushrooms and the trees that they are mutual with in the forests of Japan and China to illustrate the gains anthropology can make when we give up scepticism of natural science. Earlier in the year, Moore, at the launch of the Centre of the Anthropology of Sustainability (CAOS) at University College London used microbial research to break down the bounded image of the body, where on the cellular level culture and biology shape each other – for instance when poor black women in the States eat fish which contains mercury and this affects the biological development of their children. Tsing and Moore brought together what might previously have been considered within the remit of ecology or biology to make important points about the capacity of anthropology—and to suggest where we might go next, expanding vision of social science. When mushrooms and microbes are appropriate topics for anthropological research, then looking at the climate and its material as well as social effects (rotting, drying, illness (Jerstad 2014)) starts to look feasible.

The anthropocene is a term which has been shown to have considerable analytical purchase outside of geology, illuminating moral and political debates about blame, the north-south divide and the global movement of materials, people and plants (Chakrabarty 2014, Tsing 2013). These ideas have been applyied in the study of climate scientists themselves (Simonetti 2015) as well as climate policy (Lahsen 2009). The anthropocene, i.e. the world as subject to the effects of human activities such as climate change, may be read as a set of material relationships, where the weather, bodies and landscapes meet, as Ingold showed (2010). This term allows the larger picture, where the world and all the people in it – those people for whom climate change matters – to be considered in a single conceptual space. In this space climate change can be seen as part of the encompassing extra-somatic human activity which defines our world as we are starting to understand it.

The anthropocene and climate change, however, both involve the challenge of how to follow the conceptual and material threads that lead from these global issues and into particular, ethnographically described lives:

 A close examination of scientific practice makes clear that localizing is as much a problem for climate researchers as it is for ethnographers. This holds not only for the     interconnectedness of the global and the local climate, but also for the separation of climate change as a ‘scientific fact’ on the one hand, and a ‘matter of concern’ on the other. Climate research offers an insight into a messy world of ramifications, surprising activities and unexpected “social” context (Krauss 2009:149–50).

Anthropological work has the reflexive capacity to deal with the messy world Krauss refers to here, where these ramifications, surprising activities and unexpected ‘social’ context are part of the particular places where we, as anthropologists, work, taking cues from events and observations around us. In my own fieldwork I found all kinds of unanticipated connections between weathers and other aspects of life. With a research proposal full of religion and ‘belief’ I ended up with far more material interests, guided by the sometimes patient and sometimes exasperated villagers with whom I lived in the western Indian Himalayas.

I was walking with Karishma to get green grass one day during the monsoon. She told me that our village (Gau) is famous for being misty, and therefore that the girls are known, both for working hard and for being beautiful, because even though they are outside the mistiness keeps them pale. So apparently on festival days people say that the girls from this village are gori (white) because there is so much mist here. But Karishma pointed out that this can’t be true because there is mist only in the rainy season. Then she said that the girls here wear sweaters to stay gori. Also, she said girls of this village have a reputation for being hard working so people ask for them in marriage when there is a household where work is to be done. This (I think) might be part of why quite a few of the new brides in Gau are not used to doing as much work as women do here. But then Karishma said fairly that it is not just the girls who work hard, everyone works hard in this village (well, most people). She said that when girls go away to study, like she did, then they come back more beautiful. That is to say pale from not being outside. She was saying how on the other hand I had become more black (kala) since being there in the village (this was true).

People, whether Himalayan villagers or Norwegian PhD students, live with weather on an ongoing basis, and consistently live in the weather, which is not always catastrophic but does always impinge (think food perishability, wardrobe choices, sitting in the shade). The considerations people have with regards to the weather, then, necessarily translate to potential climate change concerns. Climate change is a threat, it has potentially deadly dimensions, but weather is inherent to our world, and I would not want to pathologize it.

Weather relates in fundamental ways to sensation and the body, thermal infrastructure, agriculture and animal husbandry, health and illness, disasters and other areas of anthropology (that is to say life). Weather may be implicated in all kinds of ways with other areas of life – for instance the hot/cold symbolism in India which classifies illness, the body, food and even moods. I think that it can be surprisingly easy to forget or ignore weather precisely because it is so pervasive. And this resistance of the mind against focusing on it is a risk when it comes to climate change. It can be tiring to think about. How, after all, do you write about the wind? And people have (Parkin 1995, James 1972, Hsu and Low 2007), but personally I find it challenging just to make a start – capturing the sky with a few black marks on paper feels so unrealistic. In that sense it is a great stretching area for our minds, about the material and the social, about what we mean with words like ‘impact’ and ‘atmosphere’ and the connections between people and places.

Finally there is the role of anthropology in clarifying the terms of the climate change debate. This is a new kind of challenge, it is a global one (hence the usefulness of Tsing’s work, who demonstrated the crucial part material relationships and meetings play in globalisation (2005)), it is to do with both technologies and nature (we can apply Latour, who shows in ‘we have never been modern’ (1993) how ‘modernity’ has not succeeded in cutting us off from the material and natural world around us), it is political, historical (hence Chakrabarty, whose work pushes us to think in new ways about how we are positioned in history and what place climate change has in this context), and there is something about it which is pushing at the edges in all these areas and others, in which new terms are required to even conceive of some of these problematics. Building on what we understand and moving further, in ways that might tread new neural pathways and enable new realities, simply from the newness of our thinking, feels like a worthwhile undertaking. I suggest that the orientation of research which maps out the weather-weight of social life can help bring the people back into climate change.

So the immovable stone of ‘climate change’ is being loosened up, pulled apart to reassemble in illuminating and constructive ways by people contributing to blow away the fog obstructing understanding, using the culminations of what we know so far and the ways in which we can think new thoughts. This effort rewards.

References

AAA statement on climate change. 29th January 2015. http://www.aaanet.org/cmtes/commissions/CCTF/upload/AAA-Statement-on-Humanity-and-Climate-Change.pdf Accessed 1st July 2015.

Chakrabarty, Dipesh 2014. Climate and Capital: On Conjoined Histories. Critical Inquiry 41(1):1-23.

Crate, Susan. 2008. Gone the Bull of Winter? Grappling with the Cultural Implications of and Anthropology’s Role(s) in Global Climate Change. Current Anthropology 49:569-595.

Crate, Susan and Mark Nuttall, eds. 2009. Anthropology and Climate Change: from Encounters to Actions. California: Left Coast Press.

Cruikshank, Julie. 2005. Do Glaciers Listen? Local Knowledge, Colonial Encounters, and Social Imagination. Toronto: University of British Columbia Press.

Douglas, Mary. 1992. Risk and Blame. London: Routledge

Grodzins-Gold, Ann. 1998. Sin and Rain: Moral Ecology in Rural North India. In Lance Nelson ed. Purifying the Earthly Body of God. New York: State University of New York Press.

Hsu, Elizabeth and Chris Low eds. 2007: Wind, Life, Health: Anthropological and Historical Perspectives. Special issue. Journal of the Royal Anthropological Institute 13:S1-S181.

Ingold, T. (2010), Footprints through the weather-world: walking, breathing, knowing. Journal of the Royal Anthropological Institute, 16: S121–S139.

James, Wendy. 1972. The politics of rain control among the Uduk. In Ian Cunnison and Wendy James eds. Essays on Sudan ethnography presented to Sir Edward Evans-Pritchard. London: C. Hurst.

Jerstad, Heid. 2014. Damp bodies and smoky firewood: material weather and livelihood in rural Himachal Pradesh. Forum for development studies 41(3):399-414.

Krauss, Werner. 2009. Localizing Climate Change: A Multi-sited Approach. In Marc-Anthony Falzon and Clair Hall eds. Multi-Sited. Ethnography. Theory, Praxis and Locality in Contemporary Research 149-165. Ashgate.

Lahsen, Myanna. 2009. A science-policy interface in the Global South: The politics of carbon sinks and science in Brazil. Climatic Change 97:339–372.

Paolisso, Michael. 2003. Chesapeake Bay watermen, weather and blue crabs: cultural models and fishery policies. In Sarah Strauss and Benjamin Orlove eds. Weather, Climate, Culture. Oxford: Berg.

Rudiak-Gould, Peter. 2013. Climate change and tradition in a small island state: the rising tide. Routledge.

Simonetti, Christian. 2015. The stratification of time. Time and Society .

Strauss, Sarah and Orlove, Benjamin eds. 2003. Weather, climate, culture. Oxford: Berg

Tsing, Anna. 2013. Dancing the Mushroom Forest. PAN: Philosophy, Activism, Nature vol 10.

Tsing, Anna. 2005. Friction. Princeton University Press.

Brasil e mais 169 países assinam acordo sobre mudança climática (Estadão)

Cláudia Trevisan e Altamira Silva Junior – 22 de abril de 201

Dilma: 'O caminho que teremos de percorrer agora será ainda mais desafiador: transformar nossas ambiciosas aspirações em resultados concretos'

Dilma: ‘O caminho que teremos de percorrer agora será ainda mais desafiador: transformar nossas ambiciosas aspirações em resultados concretos’

Representantes de 170 países assinaram nesta sexta-feira, 22, o Acordo de Paris sobre mudança climática, batendo o recorde da história da Organização das Nações Unidas (ONU) de adesão a um tratado internacional em um único dia. Mas todos ouviram o alerta do secretário-geral da entidade, Ban Ki-Moon, de que as boas intenções terão pouco impacto se a convenção não for ratificada pelos países o mais breve possível. Sem isso, o tratado não entrará em vigor.

“Estamos em uma corrida contra o tempo”, disse Ban no discurso de abertura da cerimônia, no plenário da ONU em Nova York. A urgência foi enfatizada por vários chefes de Estado, incluindo os presidentes do Brasil, Dilma Rousseff, e da França, François Hollande.

Dilma assegurou “a pronta entrada em vigor” da convenção, mas essa decisão depende do Congresso. “O caminho que teremos de percorrer agora será ainda mais desafiador: transformar nossas ambiciosas aspirações em resultados concretos”, disse a presidente em seu discurso. E repetiu os compromissos assumidos pelo Brasil durante a negociação do tratado, entre os quais a promessa de reduzir em 37% a emissão de gases poluentes até 2025, na comparação com os patamares registrados em 2005.

Frustração. Carlos Rittl, secretário executivo do Observatório do Clima, disse que Dilma frustrou as expectativas de entidades ambientais que esperavam uma sinalização clara de que o Brasil assumirá metas mais ambiciosas em 2018, quando haverá uma avaliação dos resultados do acordo. “O Brasil precisa reconhecer que deve fazer mais que o prometido no ano passado”, disse. “Todos devem, porque estamos na trajetória de 3ºC de aquecimento.”

Aprovado por representantes de 195 nações em dezembro, o tratado prevê uma série de compromissos nacionais com o objetivo de limitar o aumento da temperatura do planeta a 2ºC até o fim do século, em relação ao patamar anterior ao período industrial. Para que entre em vigor, o Acordo de Paris precisa ser ratificado por pelo menos 55 países que representem ao menos 55% das emissões de gases do efeito estufa.

“A era do consumo sem consequências chegou ao fim. Nós temos de intensificar os esforços para ‘descarbonizar’ nossas economias”, ressaltou o secretário-geral das Nações Unidas. Além do caráter simbólico, a cerimônia desta sexta tinha o objetivo de mobilizar os líderes mundiais em torno da ratificação do acordo, de forma que entre em vigor no próximo ano e não em 2020, como inicialmente previsto.

Primeiro a discursar, o presidente da França lembrou que Paris vivia uma situação trágica em dezembro, sob o impacto dos atentados terroristas que haviam provocado a morte de 130 pessoas no mês anterior. Ainda assim, ressaltou, foi possível fechar o acordo histórico sobre mudança climática.

By 2050 Asia at high risk of severe water shortages: MIT study (Reuters)

Thu Apr 14, 2016 11:30am EDT

CAMBRIDGE, MASS 

A new study points to the risk that China and India will be facing severe water shortages due to a perfect storm of economic growth, climate change, and demands of fast growing populations by mid century. 

Within 35 years, the countries where roughly half the world’s population lives may be facing what scientists are calling a “high risk of severe water stress”. That translates into billions of people having access to a lot less water than they do today, according to a new study from MIT.

“There is about a one in three chance that if we take no action to mitigate climate or to do anything to curtail any of the factors that go into this water stress metric, there is a one in three chance that you will reach this unsustainable situation by the middle of the century,” said Adam Schlosser, a senior research scientist who co-authored the paper published in the journal PLOS ONE.

“It’s very important to show that all things being equal, all things not changing, if we continue with what we are doing now we are running along a very dangerous pathway,” he added.

The scientists simulated hundreds of scenarios looking into the future and found that on average, the water basins that feed economic growth in China and India will have less water than they do today. At the same time, they say pressure on water resources will continue to grow as populations increase, creating an unsustainable scenario where supply loses out to demand.

“We are looking at a region where nations are really at a very rapid developing stage or they are at the precipice of a very rapid development stage and so you really can’t ignore the growth effect, you just can’t, particularly when it comes to resources,” said Schlosser.

But overshadowing everything else, they say, is climate change. While some models show that the effects of climate change could potentially benefit water resources in Asia, the majority point in the opposite direction.

Schlosser and his colleagues believe it will only exacerbate an already gloomy outlook for the future.

Coal Companies’ Secret Funding of Climate Science Denial Exposed (Eco Watch)

Elliott Negin, Union of Concerned Scientists | April 13, 2016 10:49 am

Peabody Energy—the nation’s largest investor-owned coal company—declared bankruptcy Wednesday. Among the many consequences: the company’s court-ordered disclosures are likely to yield hard evidence of Peabody’s direct links to climate science denial.

After all, that’s what we learned from the bankruptcy filings of two other major U.S. coalcompanies, Arch Coal and Alpha Natural Resources. The companies’ lists of creditors accompanying their chapter 11 bankruptcy filings both cited known climate science deniers. So far, the bankruptcy cases have not revealed the details of these financial relationships. But there is now no doubt the coal companies contracted with these groups and individuals to either make a donation or pay for services.

Recent bankruptcy filings have revealed that Chris Horner, who regularly derides climate science on Fox News Channel, has financial ties to the coal industry.Recent bankruptcy filings have revealed that Chris Horner, who regularly derides climate science on Fox News Channel, has financial ties to the coal industry.

This new evidence is important at a time when coal and oil and gas companies are under increased scrutiny about their ongoing climate science disinformation campaigns. ExxonMobil, for example, currently faces state and possibly federal investigations into whether the discrepancies between what the company knew about climate science and what it told their shareholders and the public amounted to fraud.

Of course, there’s no shortage of historical evidence of the coal industry’s track record of deceiving the public about global warming. In 1991, for example, coal trade associations formed a short-lived front group called the Information Council on the Environment that ran a national public relations campaign downplaying the known risks of climate change. All through the 1990s, coal trade groups also were members of the Global Climate Coalition, an alliance of companies and business groups that disputed the findings of the U.N. Intergovernmental Panel on Climate Change (IPCC) and, later on, helped scuttle the Kyoto Protocol climate treaty. And, more recently, the American Coalition for Clean Coal Electricity paid a lobbying firm to send forged letters to members of Congress from actual nonprofit groups, including the NAACP and the American Association of University Women, espousing fabricated opposition to a 2009 climate change bill.

But such coal company connections have been harder to pin down in the current era of so-called dark money. That’s what makes the latest disclosures so noteworthy: They indicate that coal industry disinformation campaigns have continued even as the scientific evidence that burning fossil fuels is driving climate change has only become stronger.

Revealing Creditor Lists

The creditor list for Alpha Natural Resources—which filed for bankruptcy last August—indicates that the company has been especially active in supporting the denier network. As first reported by The Intercept, Alpha—the fourth largest U.S. coal company—has financial ties with a half dozen denier organizations, some which have direct links to billionaire brothers Charles and David Koch, owners of the coal, oil and gas conglomerate Koch Industries. The Koch-affiliated groups include Americans for Prosperity, the Institute for Energy Research and Freedom Partners Chamber of Commerce, a de facto Koch bank that disburses donations from anonymous, wealthy conservatives to groups that advocate rolling back public health, environmental and workplace protections.

Other Alpha creditors include the U.S. Chamber of Commerce, which questions the legitimacy of climate models; the Heartland Institute, which is probably best known for its billboard likening climate scientists to the serial killer Ted Kaczynski; and the American Legislative Exchange Council (ALEC), which convenes conferences for its state legislator members featuring speakers who distort climate science and disparage renewable energy. One of the speakers at a summer 2014 ALEC conference, for example, was Heartland Institute President Joe Bast, whose slide presentation falsely claimed: “There is no scientific consensus on the human role in climate change” and “The Intergovernmental Panel on Climate Change … is not a credible source of science or economics.”

The Alpha creditor list also includes at least two individuals with links to denier groups. Particularly noteworthy is Chris Horner, an attorney who is closely associated with a number of nonprofit denier groups, including ALEC, the Competitive Enterprise Institute (CEI), the Heartland Institute, the Energy & Environmental Legal Institute (E&E Legal), formerly the American Tradition Institute, and the Free Market Environmental Law Clinic, another Alpha creditor.

Arch Coal, the second largest U.S. coal company, listed ALEC and E&E Legal in its list of creditors when it filed for chapter 11 protection in January. Just last month, the Wall Street Journal reported that the company donated $10,000 to E&E Legal in 2014. E&E Legal’s executive director, Craig Richardson, told the Journal the contribution was for “general support.”

Chris Horner’s Coal Ties Disclosed

The exposure of Horner’s financial ties to coal companies is significant because he is a regular guest on Fox News Channel, which identifies him by his affiliation with CEI or E&E Legal but not by his connection to the coal industry.

Despite his lack of scientific expertise, Horner routinely critiques scientific findings, has called for spurious investigations of climate scientists affiliated with the IPCC and the National Aeronautics and Space Administration and has harassed scientists by filing intrusive open records requests with the universities where they work. As legal counsel for the Energy & Environmental Legal Institute and the Free Market Environmental Law Clinic—which work in tandem—Horner has targeted a number of leading climate scientists, including James Hansenand Katharine Hayhoe. Perhaps his most notorious lawsuit was against the University of Virginia to obtain emails, draft research papers, handwritten notes and other documents related to the work of Michael Mann, lead author of the famous “hockey stick” study demonstrating the link between increased fossil fuel use and rising global temperatures. The Virginia Supreme Court ultimately ruled in favor of the university and Mann, affirming the school’s right to protect the privacy of its researchers from overly broad open records requests.

According to the Wall Street Journal, Alpha paid Horner $18,600 before it declared bankruptcy. Meanwhile, the Free Market Environmental Law Clinic—an Alpha creditor—paid him $110,000 in 2014, $115,865 in 2013 and $60,449 in 2012, according to the clinic’s tax filings.

Besides Alpha and Arch Coal, Horner has ties to other coal companies. Last summer, he was a featured speaker at a private $7,500-a-person golf and fly-fishing retreat sponsored by Alpha, Arch Coal and four other coal companies: Alliance Resource Partners, Consol Energy, Drummond and United Coal. After the event—the 2015 annual Coal & Investment Leadership Forum—attendees received an email from the coal company CEOs praising Horner, according to the Center for Media and Democracy, a nonpartisan political watchdog group that first reported the connection between Arch Coal and E&E Legal. “As the ‘war on coal’ continues,” the email stated, “I trust that the commitment we have made to support Chris Horner’s work will eventually create a greater awareness of the illegal tactics being employed to pass laws that are intended to destroy our industry.”

Given the recent spate of bankruptcies, the companies’ commitment to Horner likely will create a greater awareness of something quite different: that the coal industry—along with the likes of ExxonMobil and Koch Industries—is still funding denier groups to spread disinformation about climate science and delay government action. It is time we held these companies accountable.

Despite being ‘the biggest threat facing humanity’ climate change and its impacts fail to make headlines, says study (Science Daily)

Date:
April 6, 2016
Source:
International Fund for Agricultural Development (IFAD)
Summary:
Even as 60 million people around the world face severe hunger because of El Niño and millions more because of climate change, top European and American media outlets are neglecting to cover the issues as a top news item, says a new research report.

Even as 60 million people around the world face severe hunger because of El Niño and millions more because of climate change, top European and American media outlets are neglecting to cover the issues as a top news item, says a new research report funded by the International Fund for Agricultural Development (IFAD) today.

“It’s incredible that in a year when we have had record temperatures, 32 major droughts, and historic crop losses that media are not positioning climate change on their front pages,” said IFAD President, Kanayo F. Nwanze. “Climate change is the biggest threat facing our world today and how the media shape the narrative remains vitally important in pre-empting future crises.”

The report, “The Untold Story: Climate change sinks below the headlines” provides an analysis of the depth of media reporting around climate change in two distinct periods: two months before the 21st session of the UNFCCC Conference of the Parties (COP21) in Paris, and two months after. Specifically, it explores whether issues connecting climate change, food security, agriculture and migration made headlines, and if so, how much prominence these stories were given.

Among some of its key findings: • Climate change stories were either completely absent or their numbers decreased in major media outlets in Europe and the United States before and after COP21. • Coverage on the consequences of climate change, such as migration, fell by half in the months after COP21 and people directly impacted by climate change rarely had a voice in stories or were not mentioned at all. • News consumers want climate change issues and solutions to be given more prominence in media outlets and, in particular, want more information on the connections between climate change, food insecurity, conflict and migration.

The release of the report comes just days before world leaders gather at the United Nations in New York to sign off on the Paris Agreement coming out of COP21. In December, the agreement made headlines and led news bulletins across the globe. But leading up to COP21 and in the months following it, coverage on climate change significantly fell off the radar of major media outlets across Europe and the United States.

“The research shows how the average news-consuming public want to hear constructive stories that highlight solutions to climate change, yet this is exactly what is missing from major news outlets,” said Sam Dubberley, a former journalist and Director of Kishnish Media Ltd, and the author of the report.

Building on initial research that was conducted on media in France and the United Kingdom in September 2015, the report is augmented by focus group surveys that look at what newsreaders understand about food and climate-related migration and their impression of media coverage provided. The report asks what expert voices were heard throughout the stories and whether farmers or migrants themselves had a voice.

The research findings are drawn from an analysis of the content of news stories across influential and popular media outlets: TF1 and France 2 in France, RAI and LA7 in Italy, BBC and Channel 4 in the United Kingdom and CBS and NBC in the United States, as well as the front pages of print editions of Le Monde and Libération in France, Corriere della Sera and La Repubblica in Italy, The Guardian and Daily Mail in the United Kingdom and the New York Times and USA Today in the United States.

In 2014, IFAD funded a research report that looked at how 19 large global and regional news organizations covered issues related to migration and, in particular, food security and agriculture and how it impacted on migration. It focused on two stories that made headlines over the summer of 2014 — the US/Mexico border crisis and the ongoing conflict in South Sudan, which created a large numbers of migrants. That report also found that the depth of coverage on the topics was lacking, and in particular that the voices of migrants were often left out of the stories.

Download the report: https://www.ifad.org/documents/10180/6173b0cf-3423-408c-aac6-e6da78f01239

The Stark Realities of Baked-In Catastrophes (Collapse of Industrial Civilization)

02 Apr 2016

Joe-Webb-Greetings-From-California

In a civilization gone mad with delusions of grandeur, we’re left with tatters of human sociability held together by rancid mythologies.

Despite human fossil fuel burning recently reported to be “flat”, CO2 levels have been on a tear for the last six months, reaching new worrying levels which have some wondering whether permafrost melt may be contributing to the unusually high spike if no decline happens soon. The giant holes in Siberia serve as an ominous sign. Considering that the current El Niño is contributing only 10% to what we are now seeing, runaway global warming may be accelerating worldwide. But don’t worry, Warren Buffett says climate change is no more of a problem than the Y2K bug and will be profitable through increased premiums and inflation.

Ever dire studies continue to reaffirm worst case scenarios, making clear to anyone paying attention that Earth in the next century will be unrecognizable from its current state. Basic planetary geography and atmospheric conditions will be altered through warming oceans and rising sea levels which are now increasing faster than at any time in the past 2800 years. On average, sea levels were between 50 and 82 feet higher the last time CO2 levels were at 400ppm. Glaciologist Jason Box expects ice melt from the West Antarctic to become the biggest contributor to sea level rise in the coming decades due to a feedback loop not in the climate models. CO2 levels have been increasing around 3ppm per year, a twentyfold increase since pre-industrial times when the highest recorded increase was 0.15 ppm per year. We’ve long since passed the tipping point of melting Arctic summer sea ice; 300-350 ppm of CO2 was the threshold for many parts of the climate. These changes are irreversible on a timescale of human civilizations. Even if all human industrial activity magically ceased today, the footprint man has already left will be felt for eons.

In our warming world, the hydrologic cycle is changing and creating extreme weather; crop-destroying droughts and floods are becoming more frequent. The Jet Stream is transforming into something different, becoming wavier with higher ridges and troughs prone to stagnating in the same region. As global temperatures rise over time, hotter air will be trapped under these layers of high pressure from a mangled Jet Stream, cooking everything to death. Rising winter temperatures are beginning to destroy the “winter chill” needed for many fruit and nut trees to properly blossom and produce maximally. Climate change is also disrupting flower pollination and pushing fish toward North/South poles, robbing poorer countries at Equator of crucial food resources. In a new study, marine scientists are surprised to find a disturbing trend in the increasing numbers of a specific type of phytoplankton, coccolithophores, which have been “typically more abundant during Earth’s warm interglacial and high CO2 periods.”

tumblr_nyyguqJIIG1u6ur2mo1_500

Homo sapiens have only been on the planet for the equivalent of a few seconds in geologic time but have managed to overwhelm and foul up all of earth’s natural processes and interdependencies, leaving a distinct layer in the sedimentary record. There is nothing modern humans do that is truly sustainable. Here are a few glaring examples:

No amount of reafforestation or growing of new trees will ultimately off-set continuing CO2 emissions due to environmental constraints on plant growth and the large amounts of remaining fossil fuel reserves,” Mackey says. “Unfortunately there is no option but to cut fossil fuel emissions deeply as about a third of the CO2 stays in the atmosphere for 2 to 20 millennia.

ambiente-01

Relying on machines for answers to the existential problems of a species run amok with planet-destroying tools and weaponry is rather ironic and tragic. We’re locked-up inside a complexity trap of our own making. The human propensity for tool-building coupled with our discovery of fossil fuels has created a set of living arrangements in which we are now enslaved to those machines and tools. The globalized capitalist economy externalizes its destruction and atrocities, keeping the masses in a state of ignorance and denial. Our corporate overlords are not conscientious citizens, but mindless organizations whose sole purpose is to grow profits no matter the external damage done to society and the environment. Between the economic oil hitmen who ensure that profits flow smoothly and GOP politicians who openly espouse their science illiteracy, a hospitable climate for future humans seems remote. Hopeful delusions have given way to the stark reality of our predicament as scholars like Noam Chomsky who originally started his career fighting for a modicum of social justice have now set the bar at just the chance of human survival. Despite the best efforts of scientists, environmentalists, and activists, the wealthy countries most able to do something won’t “get it” until famine, disease, and war come to their country. All is being left for the almighty ‘free market’ to sort out at the same time that climate change, a conflict multiplier, ramps up.

imageedit_3_7415100861

The sixth mass extinction gathers steam and climate inertia works to catch up to the catastrophic ecological collapse already baked-in. All the while, modern man engages in the spectacle of tribal politics(building walls, exuding military strength, recapturing past glories of their nation) and presidential candidates discuss the size of their penis.

For those who come to understand modern man’s predicament, it can either be the ultimate mind fuck or an epiphany that helps a person appreciate the fragility of life, the urgency of living in the here and now, and the grand cosmic joke of a global, hi-tech civilization that arose from the burning of ancient fossil remains only to have those fumes become a deadly curse, extinguishing any trace of our lofty accomplishments…

The fossil record, Plotnick points out, is much more durable than any human record.

As humanity has evolved, our methods of recording information have become ever more ephemeral,” he said. “Clay tablets last longer than books. And who today can read an 8-inch floppy?” he shrugged. “If we put everything on electronic media, will those records exist in a million years? The fossils will.
– Link

Mudanças climáticas provocarão prejuízo de US$ 2,5 trilhões (O Globo)

05/04/2016, por O Globo

Colheita de cana de açúcar: rombo acontecerá mesmo se os países cumprirem as metas voluntárias apresentadas na conferência climática de Paris, em dezembro de 2015 – Paulo Fridman/Bloomberg/18-9-2014

RIO — As mudanças climáticas podem afetar investimentos equivalentes a US$ 2,5 trilhões da economia mundial até 2100, segundo um estudo publicado ontem na revista “Nature Climate Change”. O prejuízo seria resultado do aumento da temperatura em 2,5 graus Celsius até o fim do século, em relação aos níveis pré-industriais. Esta quantia é equivalente à metade do valor atual das empresas de combustíveis fósseis. Se os termômetros avançarem além de 2 graus Celsius — valor máximo admitido pelos climatologistas —, a economia mundial sofreria um rombo de US$ 1,7 trilhão.

Entre os meios de destruição mais comuns ligados às mudanças climáticas estão o aumento do nível do mar — que afeta principalmente setores da economia atuantes na zona costeira —, além de secas e tempestades, capazes de interromper atividades de diferentes ramos do mercado.

A pesquisa concentrou-se principalmente em investimentos ligados a petróleo, carvão e gás, recursos que serão perdidos se os países insistirem na adoção de combustíveis fósseis, em de vez de optar por energias sustentáveis.

De acordo com o Instituto de Pesquisa Grantham sobre Mudanças Climáticas, que elaborou o estudo, seus cálculos são a primeira estimativa do impacto causado pelo aquecimento global sobre ativos financeiros.

As projeções, realizadas com o uso de modelos matemáticos, foram baseados em um valor estimado de US$ 143,3 trilhões em ativos não bancários globais em 2013, valor determinado por economistas.

Considerando as atuais emissões de gases-estufa, os climatologistas indicam que o planeta está a caminho de um aquecimento global equivalente ou superior a 4 graus Celsius. Se as nações cumprirem as metas que apresentaram na Conferência do Clima em Paris, no fim do ano passado, o aumento da temperatura global chegará a 3 graus Celsius.

As mudanças climáticas devem ser encaradas com preocupação para setores e investidores que exercem a atividade pensando a longo prazo, como os fundos de pensão e reguladores financeiros.

Diretor do programa de finanças sustentáveis da Universidade de Oxford, no Reino Unido, Ben Caldecott ressalta que os impactos financeiros das mudanças climáticas são um risco de grande escala.

— Os investidores podem fazer muito para diferenciar entre as empresas mais ou menos expostas e, assim, conseguirem ajudar a reduzir os riscos para a economia global, apoiando ações ambientais sobre as mudanças climáticas.

MAIS GRAVE QUE POLIOMIELITE

Ontem, um relatório divulgado na Casa Branca alertou que as mudanças climáticas representam uma grave ameaça para a saúde pública — em muitos aspectos, pior do que a poliomielite — e atacará especialmente gestantes, crianças, pessoas de baixa renda, negros, asiáticos e hispânicos.

O documento “Os impactos das mudanças climáticas na saúde humana nos EUA: uma avaliação científica”, adverte sobre os riscos arrebatadores para a saúde pública do aumento da temperatura nas próximas décadas, que também levaria a mais mortes e doenças por insolação, insuficiência respiratória e doenças como o vírus do Nilo Ocidental.

Aumento do nível do mar ameaça inundar estação da Nasa (O Globo)

05/04/2016, por O Globo

Lançamento de foguete em Cano Canaveral: centro tecnológico é vulnerável a aumento do nível do mar– John Raoux/AP/18-11-2013

RIO — Um dos maiores e mais sofisticados centros de tecnologia do mundo, a base de lançamento de foguetes da Nasa em Cabo Canaveral, na Flórida, corre risco de ser inundada. O aumento do nível do mar, em consequência das mudanças climáticas, ameaça a infraestrutura da agência espacial ao longo da costa de 115 km. Os riscos já levaram a agência espacial americana a estudar a remoção das instalações.

Em todo o país, cerca de dois terços das instalações da Nasa estão em regiões de altitude inferior a 4,8 metros, e a maior parte se localiza em zonas costeiras, onde as agitadas correntes oceânicas já contribuem para a erosão dos equipamentos.

— Estamos tremendamente ligados à água — alerta Kim Toufectis, estrategista da agência espacial americana.

De acordo com um estudo publicado semana passada na revista “Nature”, o aquecimento global pode aumentar o nível do mar entre 1,5 metro e 1,8 metro até o fim do século. Um grupo de trabalho da Nasa estima que o aumento do nível do mar de 12 centímetros para mais de 60 centímetros até 2050 pode levar a problemas em cinco estações costeiras da agência:

“Os centros da Nasa que já estão sob risco de inundação devem se tornar mais vulneráveis no futuro”, previa o grupo em um relatório em 2014.

Com a ameaça do clima, a Nasa tem como alternativa a instalação de barreiras e outras estruturas que contenham o aumento do nível do mar e os efeitos de tempestades e inundações. Em locais onde a adaptação não for possível, uma alternativa será o “recuo estratégico” — uma medida bem mais cara, na casa dos bilhões de dólares.

Além de exigir muito dinheiro, a remoção das instalações envolve a construção de edifícios, traslado de equipamentos e deslocamento de equipes, e por isso ainda deve demorar.

Leading Climate Scientists: ‘We Have A Global Emergency,’ Must Slash CO2 ASAP (Think Progress)

 MAR 22, 2016 2:38 PM

CREDIT: AP/DENNIS COOK

James Hansen and 18 leading climate experts have published a peer-reviewed version of their 2015 discussion paper on the dangers posed by unrestricted carbon pollution. The study adds to the growing body of evidence that the current global target or defense line embraced by the world — 2°C (3.6°F) total global warming — “could be dangerous” to humanity.

That 2°C warming should be avoided at all costs is not news to people who pay attention to climate science, though it may be news to people who only follow the popular media. The warning is, after all, very similar to the one found in an embarrassingly underreported report last year from 70 leading climate experts, who had been asked by the world’s leading nations to review the adequacy of the 2°C target.

Specifically, the new Hansen et al study — titled “Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 C global warming could be dangerous” — warns that even stabilizing at 2°C warming might well lead to devastating glacial melt, multimeter sea level rise and other related catastrophic impacts. The study is significant not just because it is peer-reviewed, but because the collective knowledge about climate science in general and glaciology in particular among the co-authors is quite impressive.

Besides sea level rise, rapid glacial ice melt has many potentially disastrous consequences, including a slowdown and eventual shutdown of the key North Atlantic Ocean circulation and, relatedly, an increase in super-extreme weather. Indeed, that slowdown appears to have begun, and, equally worrisome, it appears to be supercharging both precipitation, storm surge, and superstorms along the U.S. East Coast (like Sandy and Jonas), as explained here.

It must be noted, however, that the title of the peer-reviewed paper is decidedly weaker than the discussion paper’s “Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2°C global warming is highly dangerous.” The switch to “could be dangerous” is reminiscent of the switch (in the opposite direction) from the inaugural 1965 warning required for cigarette packages, “Caution: Cigarette Smoking May Be Hazardous to Your Health” to the 1969 required label “Warning: The Surgeon General Has Determined that Cigarette Smoking Is Dangerous to Your Health.”

And yes I’m using the analogy to suggest readers should not be sanguine about the risks we face at 2°C warning. Based on both observations and analysis, the science is clearly moving in the direction that 2°C warming is not “safe” for humanity. But as Hansen himself acknowledged Monday on the press call, the record we now have of accelerating ice loss in both Greenland and West Antarctica is “too short to infer accurately” whether the current exponential trend will continue through the rest of the century.

Hansen himself explains the paper’s key conclusions and the science underlying them in a new video:

The fact that 2°C total warming is extremely likely to lock us in to sea level rise of 10 feet or more has been obvious for a while now. The National Science Foundation (NSF) itself issued a news release back in 2012 with the large-type headline, “Global Sea Level Likely to Rise as Much as 70 Feet in Future Generations.” The lead author explained, “The natural state of the Earth with present carbon dioxide levels is one with sea levels about 70 feet higher than now.” Heck, a 2009 paper in Science found the same thing.

What has changed is our understanding of just how fast sea levels could rise. In 2014 and 2015, a number of major studies revealed that large parts of the Antarctic and Greenland ice sheets are unstable and headed toward irreversible collapse — and some parts may have already passed the point of no return. Another 2015 study found that global sea level rise since 1990 has been speeding up even faster than we knew.

The key question is how fast sea levels can rise this century and beyond. In my piece last year on Hansen’s discussion draft, I examined the reasons the Intergovernmental Panel on Climate Change (IPCC) and scientific community have historically low-balled the plausible worst-case for possible sea level rise by 2100. I won’t repeat that all here.

The crux of the Hansen et al. forecast can be found in this chart on ice loss from the world’s biggest ice sheet:

Antarctic ice mass change

Antarctic ice mass change from GRACE satallite data (red) and surface mass balance method (MBM, blue). Via Hansen et al.

Hansen et al. ask the question: if the ice loss continues growing exponentially how much ice loss (and hence how much sea level rise) will there be by century’s end? If, for instance, the ice loss rate doubles every 10 years for the rest of the century (light green), then we would see multi-meter sea level rise before 2100? On the other hand, it is pretty clear just from looking at the chart that there isn’t enough data to make a certain projection for the next eight decades.

The authors write, “our conclusions suggest that a target of limiting global warming to 2°C … does not provide safety.” On the one hand, they note, “we cannot be certain that multi-meter sea level rise will occur if we allow global warming of 2 C.” But, on the other hand, they point out:

There is a possibility, a real danger, that we will hand young people and future generations a climate system that is practically out of their control.
We conclude that the message our climate science delivers to society, policymakers, and the public alike is this: we have a global emergency. Fossil fuel CO2 emissions should be reduced as rapidly as practical.

I have talked to many climate scientists who quibble with specific elements of this paper, in particular whether the kind of continued acceleration of ice sheet loss is physically plausible. But I don’t find any who disagree with the bold-faced conclusions.

Since there are a growing number of experts who consider that 10 feet of sea level rise this century is a possibility, it would be unwise to ignore the warning. That said, on our current emissions path we already appear to be headed toward the ballpark of four to six feet of sea level rise in 2100 — with seas rising up to one foot per decade after that. That should be more than enough of a “beyond adaptation” catastrophe to warrant strong action ASAP.

The world needs to understand the plausible worst-case scenario for climate change by 2100 and beyond — something that the media and the IPCC have failed to deliver. And the world needs to understand the “business as usual” set of multiple catastrophic dangers of 4°C if we don’t reverse course now. And the world needs to understand the dangers of even 2°C warming.

So kudos to all of these scientists for ringing the alarm bell: James Hansen, Makiko Sato, Paul Hearty, Reto Ruedy, Maxwell Kelley, Valerie Masson-Delmotte, Gary Russell, George Tselioudis, Junji Cao, Eric Rignot, Isabella Velicogna, Blair Tormey, Bailey Donovan, Evgeniya Kandiano, Karina von Schuckmann, Pushker Kharecha, Allegra N. Legrande, Michael Bauer, and Kwok-Wai Lo.

Risk of multiple tipping points should be triggering urgent action on climate change (Science Daily)

To avoid multiple climate tipping points, policy makers need to act now to stop global CO2 emissions by 2050 and meet the Paris Agreement’s goal of limiting global warming to 1.5 °C above pre-industrial levels, a new study has said

Date:
March 21, 2016
Source:
University of Exeter
Summary:
Pioneering new research shows that existing studies have massively under-valued the risk that ongoing carbon dioxide emissions pose of triggering damaging tipping points.

Detailed view of Earth from space. Credit: Elements of this image furnished by NASA; © timothyh / Fotolia

To avoid multiple climate tipping points, policy makers need to act now to stop global CO2 emissions by 2050 and meet the Paris Agreement’s goal of limiting global warming to 1.5 °C above pre-industrial levels, a new study has said.

Pioneering new research, carried out by the Universities of Exeter, Zurich, Stanford and Chicago, shows that existing studies have massively under-valued the risk that ongoing carbon dioxide emissions pose of triggering damaging tipping points.

The collaborative study suggests that multiple interacting climate tipping points could be triggered this century if climate change isn’t tackled — leading to irreversible economic damages worldwide.

Using a state-of-the-art model, the researchers studied the effects of five interacting tipping points on the global economy — including a collapse of the Atlantic overturning circulation, a shift to a more persistent El Nino regime, and a dieback of the Amazon rainforest.

The study showed that the possibility of triggering these future tipping points increased the present ‘social cost of carbon’ in the model by nearly eightfold — from US$15 per tonne of carbon dioxide emitted, to US$116/tCO2.

Furthermore, the model suggests that passing some tipping points increases the likelihood of other tipping points occurring to such an extent that the social cost of carbon would further increase abruptly.

The recommended policy therefore involves an immediate, massive effort to reduce CO2 emissions, stopping them completely by the middle of the century, in order to stabilize climate change at less than 1.5 °C above pre-industrial levels.

Professor Tim Lenton, from the University of Exeter and one of the authors of the study said: “Irreversible tipping points are one of the biggest risks we face if we carry on changing the climate. Our work shows that taking that risk seriously radically changes policy recommendations. We need to act urgently and globally to meet the most ambitious targets agreed in Paris last December and reduce the risk of future tipping points.”


Journal Reference:

  1. Yongyang Cai, Timothy M. Lenton, Thomas S. Lontzek. Risk of multiple interacting tipping points should encourage rapid CO2 emission reductionNature Climate Change, 2016; DOI: 10.1038/nclimate2964

Global warming pushes wines into uncharted terroir (Science Daily)

Heat has decoupled French grapes from old weather patterns

Date:

March 21, 2016

Source:

The Earth Institute at Columbia University

Summary:

In much of France and Switzerland, the best wine years are traditionally those with an exceptionally hot summer and late-season drought. Now, a study out this week shows that warming climate has largely removed the drought factor from the centuries-old early-harvest equation. It is only the latest symptom that global warming is affecting biological systems and agriculture.


Wine grapes in an experimental vineyard in the Vaucluse region of France, June 2014. Credit: Elizabeth Wolkovich

Many factors go into making good wine: grape variety, harvesting practices, a vineyard’s slope and aspect, soil, climate and so on–that unique combination that adds up to a wine’s terroir. Year-to-year weather also matters greatly. In much of France and Switzerland, the best years are traditionally those with abundant spring rains followed by an exceptionally hot summer and late-season drought. This drives vines to put forth robust, fast-maturing fruit, and brings an early harvest. Now, a study out this week in the journal Nature Climate Change shows that warming climate has largely removed the drought factor from the centuries-old early-harvest equation. It is only the latest symptom that global warming is affecting biological systems and agriculture.

Temperature is the main driver of grape-harvest timing, and in the last 30 years, progressive warming has pushed harvest dates dramatically forward across the globe, from California to Australia, South America and Europe. In France, where records go back centuries, since 1980 harvest dates have advanced two weeks over the 400-year mean. These earlier harvests have meant some very good years. But existing studies suggest that regions here and elsewhere will eventually become too hot for traditionally grown grapes. Vineyards may then have to switch to hotter-climate varieties, change long-established methods, move or go out of business. The earth is shifting, and terroirs with it.

In the new study, scientists analyzed 20th and 21st-century weather data, premodern reconstructions of temperature, precipitation and soil moisture, and vineyard records and going back to 1600. They showed that in the relatively cool winemaking areas of France and Switzerland, early harvests have always required both above-average air temperatures and late-season drought. The reason, they say: in the past, droughts helped heighten temperature just enough to pass the early-harvest threshold. Basic physics is at work: normally, daily evaporation of moisture from soil cools earth’s surface. If drought makes soils dryer, there will be less evaporation–and thus the surface will get hotter. The authors say that up to the 1980s, the climate was such that without the extra kick of heat added by droughts, vineyards could not get quite hot enough for an early harvest. That has now changed; the study found that since then, overall warming alone has pushed summer temperatures over the threshold without the aid of drought. On the whole, France warmed about 1.5 degrees Celsius (2.7 Fahrenheit) during the 20th century, and the upward climb has continued.

“Now, it’s become so warm thanks to climate change, grape growers don’t need drought to get these very warm temperatures,” said lead author Benjamin Cook, a climate scientist at Columbia University’s Lamont-Doherty Earth Observatory and NASA’s Goddard Institute for Space Studies. “After 1980, the drought signal effectively disappears. That means there’s been a fundamental shift in the large-scale climate under which other, local factors operate.”

The regions affected include familiar names: among them, Alsace, Champagne, Burgundy, Languedoc. These areas grow Pinot Noirs, Chardonnays and other fairly cool-weather varieties that thrive within specific climate niches, and turn out exceptionally after an early harvest. Study coauthor Elizabeth Wolkovich, an ecologist at Harvard University, said that the switch has not hurt the wine industry yet. “So far, a good year is a hot year,” she said. However, she pointed out that the earliest French harvest ever recorded–2003, when a deadly heat wave hit Europe and grapes were picked a full month ahead of the once-usual time — did not produce particularly exceptional wines. “That may be a good indicator of where we’re headed,” she said. “If we keep pushing the heat up, vineyards can’t maintain that forever.”

Across the world, scientists have found that each degree Centigrade (1.8 degrees Fahrenheit) of warming pushes grape harvests forward roughly six or seven days. With this effect projected to continue, a 2011 study by Lamont-Doherty climate scientist Yves Tourre suggests that a combination of natural climate variability and human-induced warming could force finicky Pinot Noir grapes completely out of many parts of Burgundy. Other reports say Bordeaux could lose its Cabernets and Merlots. A widely cited though controversial 2013 study projects that by 2050, some two-thirds of today’s wine regions may no longer have climates suitable for the grapes they now grow. But other regions might beckon. Grapes no longer viable in California’s Napa Valley may find suitable homes in Washington or British Columbia. Southern England may become the new Champagne; the hills of central China the new Chile. Southern Australia’s big wineries may have to land further south, in Tasmania. “If people are willing to drink Italian varieties grown in France and Pinot Noir from Germany, maybe we can adapt,” said Wolkovich.

However, this begs the question of whether vineyards, or for that matter anything can just be picked up and moved. The earth is increasingly crowded with agriculture and infrastructure, and land may or may not be available for wine grapes. If it is, the soils, slopes and other exact conditions of old vineyards would be difficult or impossible duplicate. And, grape harvests are only one of many biological cycles already being affected by warming climate, with uncertain results. Many insects, plants, and marine creatures are rapidly shifting their ranges poleward. No one yet knows whether many species or entire ecosystems can survive such rapid changes, and the same almost certainly goes for wine grapes.

Liz Thach, a professor of management and wine business at Sonoma State University, said the study is telling growers what they already know. “Some people may still be skeptical about global warming, but not anyone in the wine industry,” she said. “Everyone believes it, because everyone sees it year by year–it’s here, it’s real, it’s not going away.”


Journal Reference:

  1. Benjamin I. Cook, Elizabeth M. Wolkovich. Climate change decouples drought from early wine grape harvests in FranceNature Climate Change, 2016; DOI: 10.1038/NCLIMATE2960

On the anthropology of climate change (Eurozine)

Thomas Hylland EriksenDasa Licen

Original in English
First published in Razpotja 22 (2015)

Contributed by Razpotja
© Thomas Hylland Eriksen, Dasa Licen / Razpotja
© Eurozine

A conversation with Thomas Hylland Eriksen

Mainstream literature on globalization tends not to take the uniqueness of each locality seriously enough, says Thomas Hylland Eriksen. He explains how the anthropology of climate change is responding to the need for an analysis of the global situation seen from below.

Dasa Licen: You have a blog, a vlog where you report on your fieldwork, where you look a bit like Indiana Jones. On top of that, you write popular articles and essays. You seem to believe that media are very important for anthropology.

Thomas Hylland Eriksen: I think anthropologists should be more conscious about how they are perceived in the wider public. Unfortunately, for decades now, there has in many places been a certain withdrawal of anthropology from the public sphere. There are many burning issues, from climate change to identity politics to debates on human nature, where anthropologists are not present the way they could be. This was not always the case.

If you go back a few generations, there were many anthropologists who were also engaged public intellectuals. They were visible, well known, they wrote popular books, took part in political debates, and so on. Think of a scholar like Margaret Mead back in the 1960s: her research was controversial, but she succeeded in placing anthropology on the map by being engaged in important debates. Nowadays, there are important discussions where anthropologists would have a lot to offer, yet they are more or less absent.

An obvious example is identity politics, but you can also take the debates on human nature. In many western countries, these have been monopolized by evolutionary biologists or psychologists. The things anthropologists say about human nature are quite different, and while we are rather good at criticizing sociobiology and evolutionary perspectives amongst ourselves, we rarely go out and present our nuanced message to a wider public. It is a striking fact that the most famous anthropologists today is not an anthropologists. He is an ornithologist and physiologist called Jared Diamond who has written bestsellers about where we come from and where we are going. His latest book called The World until Yesterday is a sort of anthropological treatise about other cultures, traditional peoples, and about the kind of wisdom they contribute to the modern world. His book has not been very well received by anthropologists, because he gets a lot of things nearly right. Although he has not been trained as an anthropologist, he uses anthropological sources and asks the kind of questions we do. But he manages to do it in a way that makes people want to read his book. We should learn from these examples.

DL: We all know the case of the doctor who is walking down the street and sees an injured person: he must offer to help. Do you think something similar applies to anthropologists in the face of global crises?

THE: I do think so. In my own work, I try to address two big lumps of questions. One of them is the extent to which we can apply anthropology as a tool to understand the contemporary world. This is what my project “Overheating” is about. The second is a more general question: what is it to be human? There are two groups of answers, one of them says, well a human being is a small twig on a branch on the big tree of life: that’s the story of evolution and while it generates some important some insight, it leaves aside a different set of questions about human subjectivity and emotions. I am talking about the complexities of life, all the existential struggles that human beings are confronted with. This perspective generates an entirely different set or answers, which are at the basis of what we do as anthropologists. By addressing them, we can contribute to a more nuanced view to what it is to be a human.

We are not only homo economics, merely maximizing creatures, and although instincts can be important for understanding our behaviour, we are not driven by them but immersed in a network of additional aspects. We are also not just social animals… Clifford Geertz insisted that human beings are primarily self-defining animals. Such a perspective enables not only a better understanding of the realities of human lives, but it also has its moral implications.

DL: Which ones?

THE: Let me give you an example. One of my PhD students works in rural Sierra Leone. It is an overheated place, in the sense that the Chinese and other foreign investors are coming in, opening up mines, new roads are being built… For many people this means opportunities, for many others it means misery. My student asks a guy, “so how do you explain these changes taking place in your community in the last years?”, and this guy would just shrug and say, “well you know man, it’s the global”. We have to try to find out what exactly he means when he says “it’s the global”.

DL: Is this the aim of the Overheating project which you mentioned?

THE: What we are trying to do with Overheating is to fill a gap in the literature on globalization: we are trying to say something general about what I call the clash of scales, the dichotomy between the large and local. The large scale is the world of global capitalism, of the environment and of nation-states; on the other hand, there are the lives people live in their own communities. We are a group of researchers who’ve done fieldwork in lots of locations around the world and we try to produce ethnographic material that is comparable, so that we can use our material to create, if I can be a bit pretentious, an anthropological history of the early twenty-first century. So we are working very hard to create an analysis of the global situation seen from below.

DL: Your project seems so wide that it almost looks like the anthropology of everything…

THE: Not quite. It is the anthropology of global crisis as perceived locally. Say you live somewhere in Australia and all of a sudden a mining company arrives next door and disrupts the ecosystem, and you ask yourself, “who can I blame and what can I do”? It’s the kind of question that many people ask when confronted with changes on the large scale that affect their local community. Our informants do not distinguish between the environment, the economy, identity as they all interact and effect local life. What we are interested in is the anthropology of local responses to global changes.

DL: So, you are trying to advance an anthropological understanding of globalization?

THE: Yes. I think one of the shortcomings of the mainstream literature on globalization is that the uniqueness of each locality is not taken seriously enough: the local is present mostly in the form of anecdotes from people’s lives. The problem of anthropological studies of globalization has often been the opposite: you go really deeply into one place and you neglect the wider perspective. We are trying to feel the gap in both approaches. The metaphor I often use is that of a social scientist who sits in a helicopter with a pair of binoculars and looks at the world. This would be the case of authors like Anthony Giddens or Manuel Castells. On the other hand, you have the person who works with a magnifying glass. We are trying to bring these two levels closer.

DL: The seriousness of global warming has been neglected by anthropologists, indeed by all social sciences for a long time.

THE: This is changing. The anthropology of climate change has become one of the big growth industries in academia, just as ethnicity and nationalism were big in the 1970s and 1980s. You are from Slovenia, you know the breakup of Yugoslavia, which came as a shock to us and we needed to understand what was happening. The genocide in Rwanda happened around the same time, Hindu nationalists came to power in India, contradicting everything we thought we knew about the country, controversies emerged around migration, multiculturalism, diversity, Islam in western Europe. After the turn of the century, the issue of climate change came to be understood as another layer on top of these issues.

DL: When did you develop your interest in climate change?

THE: It must have been many years ago but it took a while before I got the opportunity to look at these interconnected issues more closely. We are not geophysicists, we do not know much about CO2, we cannot predict the temperature of the world. What we can do is study how people respond, how they react, how they talk about it and what they do.

Summit camp on top of the Austfonna Ice Cap in Svalbard (Norwegian Arctic). Photo: NASA Goddard Space Flight Center / Thorben Dunse, University of Oslo. Source: Flickr

The dangerous thing about climate changes is that it has deep consequences, and yet it is hard to find anybody to blame. Think about it: say you are in small town or village in the Andes in Peru and you notice there is something odd with the water. It is not the way it used to be, you notice the glaciers are melting, and then you know that mining company has opened an operation venue nearby. You think the mining company must be to blame, because they probably pumped out all the water and they destabilized the local climate, and so you march up to them telling them “look, you are taking away our water, we need compensation”, and they come out and they say “I’m sorry but it is not us, it is global climate change”. Where do you go to address that question? Do you write to Obama, do you write a letter to the Chinese?

The concern with climate change can be very serious in the sense that it creates a sense of powerlessness. We just have to let things happen. For this reason I have been interested in how environmental engagement begins with things that are within your reach. I probably can’t do anything about world climate, but maybe I can save some trees, or the dolphins in the harbour. That’s how engagement begins.

DL: Do you feel such helplessness when you talk about global warming and they ask you, “so what is your solution”?

THE: Good question. I guess we all have to find the best way of acting where we are. It is not as if you or I have the responsibility to save to planet, or that you will fail if you have not been able to save it. I remember that as a schoolboy I had a devout Christian teacher who was raised by missionaries in Japan. Being a Christian missionary in Japan can be very difficult because the people are generally not very interested in evangelization. She told us about a fellow Christian who had spend his entire life as a missionary in Japan and succeeded in converting one person, which made his life feel worthwhile. He felt saving one soul was well worth 50 years of hard work. We should not be overambitious regarding what we are able to achieve. We can take part in public debates, add one drop of complexity, a drop of doubt. Maybe sometimes it is enough or rather, it is all we can do.

DL: As an anthropologist you are not allowed to pass judgment on people, however sometimes it is extremely hard to avoid judgment, for example when we are confronted with obtuse forms of climate change denial.

THE: Traditionally, anthropologists have not been too good at thinking of themselves as engaged subjects, we have been taught not to pass judgment, to just lay out the facts and say, well this is what the world looks like and this is why this makes sense to those people and not to those people, and I believe that this paradigm, this kind of relative paradigm has collapsed. Such an approach can no longer function precisely for the reasons I was suggesting: we are now all in the same boat. So there is no good reason anymore to make sharp distinctions between scholarship and the wider public, because we are facing the same radical challenges. We are all part of the same moral space and sometimes we have to take an ethical or political stance, anything else would be irresponsible. But we have to strike a balance between that kind of engagement and our credibility as researchers.

Back to your question: when I study people who deny the reality of climate change I have to take their view of world seriously. Many of them really believe in the paradigm or progress, industrialism and so on. This to me is a key double bind in contemporary civilization: there is no easy way out, between economic growth and the ecological sustainability. There is no reason that anybody should have the answer. When people ask me what to do, I have to say: “Sorry, I am trying to work this out together with you. I do not have the answer.”

DL: You probably know Slavoj Zizek, he is more famous than Slovenia. He has had an ongoing dispute with Dipesh Chakrabarty on a related issue: should we first do something about global warming or engage in revolutionary struggle? Zizek believes climate change cannot be addressed outside the struggle for global emancipation, Chakrabarty on the other hand insists on the need to strike a historical compromise on a global level. What is your stance in this polemics?

THE: That is a very interesting question. On the one hand, I see the biggest tension in contemporary civilization is that between economic growth, which for two hundred years has been based on fossil fuels, and sustainability. Fossil fuels have been a blessing for humanity. They have created the foundations for modern life. Yet they are now becoming a damnation, a threat to civilization. This is hard to see from the viewpoint of a classical progressivist perspective.

This is strongly linked to another contradiction, the tension between a class based politics and green politics. What is more important, to do something about inequality or to save the world climate? Sometimes you just cannot pursue both aims. I worked in Australia, in a place where virtually everybody works directly or indirectly in industry. They have a huge power station, a cement factory, it is an industrial hub. Very few people have any environmental engagement to talk of. There is nothing about climate change in the local newspaper. It is all about industrial growth and job security. Being an environment activist in that place is very hard because your neighbours are not going to like it, but they have a very strong union-based socialist movement in that town. Those people see green politics as something that is a kind of a middle class thing. They associate it with cappuccino-sipping do-gooder students in Sydney and Melbourne, whereas us, the hard working industrial employees are the ones actually producing the cappuccino, the tablets, and they are not aware of where their wealth comes from. There is a widespread feeling of the hypocrisy of green politics.

Where do I stand? I think saving the climate is the main issue. But it should be pursued with concern for social justice. The first priority has to be to create sustainable jobs. If you take away a million jobs, you have to reproduce those jobs somewhere else. This leads me to what I think could have been an answer, had Zizek been aware of it, namely the anthropological school called human economy. There is a very creative English anthropologist who works in South Africa called Keith Hart who works from this perspective. David Graeber is sort of within the same world, looking at feasible economic alternatives to global neoliberalism. We are not talking about state socialism here: you are from Slovenia, you are too young to remember it, but state socialism did not make people too happy and it was not good for the environment either.

The point is that we need to talk about the economy in terms of human needs. The goal of economy is to satisfy human needs; not just material needs but also the need to something meaningful, to be useful for others, to see the results of what you are doing. The point of economy is not only to generate profits, but to try to fight alienation.

DL: You wrote somewhere that the Left lacks an understanding of multiculturalism and knowledge of the environment, and it tends to neglect these two fields that are extremely important right now. Isn’t that a surprising statement given that in the West, these issues have become almost synonymous with leftism?

THE: Things are indeed changing. That is probably one of the reasons Slavoj Zizek gets so angry sometimes, because he identifies with the Left, but the Left has abandoned his positions. I think many of us have the same feeling of being ideologically homeless. For 200 hundred years, the Left was quite good at promoting equality and social justice, presuming that economic growth will continue indefinitely. Then, in the 1980s multiculturalism emerged. The Left tried to appropriate it, tried to promote diversity, but it has not succeeded, because leftist movements have been good at promoting equality but not difference. Then environmental issues came as another factor complicating the picture. What do you do when you have to choose between class politics and green politics? You probably stick with class politics, but then you realize it is part of the problem, especially if you live in a rich country, as I do, where the working class flies to southern Europe all the time, going on holiday, driving cars, eating imported meat and so on. There is a big dilemma here. Again I must insist I don’t have the final answer, but at least if we identify the problem we make small steps in the right direction.

By the way, I very strongly disagree with what Zizek says about multiculturalism. Whenever he makes jokes about it, he produces a caricature of multiculturalism, rather than a parody which is arguably his aim. He does not really know what he is talking about. He knows a lot of things, but multiculturalism is not one of his strong points.

DL: Zizek has advanced a positive interpretation of the Judeo-Christian tradition from a leftist perspective. Do you think that this tradition, which sees the Earth as ultimately doomed, poses a problem for environmentalism?

THE: Good question. Probably there is something about the way in which many people talk about climate change that resembles these Judeo-Christian ideas about the end of time. We are approaching the end, we are approaching the final phase. Think about the popularity of post-apocalyptic films in science fiction. It started already in the early 1980s with Mad Max films, and there has been a series of Hollywood and other movies about the world after the apocalypse. There is a real thirst for this sort of narratives. In the text I am writing now I just quoted T. S. Eliot who writes famously that the world ends not with a bomb but with a whimper. There is no before and after. Many of the communist revolutionaries held similar chiliastic ideas: things are going to get worse and worse and worse, and then after the revolution everything is going to be fine. But we have some 200 years of experience with revolutions, and we know they tend to reproduce many of the problems they were meant to solve, and on top of that they create new ones. Take the Arab spring in North Africa and the Middle East. I think it is very dangerous to behave as if the history has a direction.

DL: This is somewhat connected to the wider issue of the role of human civilization in the environmental history of the planet. You use the term Anthropocene, yet some find it inappropriate as it puts humans in the centre, not only as the source of the trouble we are facing but also as more important than anything else on the planet. How do you feel about that?

THE: Some scientists want to have it both ways. Some think in terms of the changes that characterize the Anthropocene and at the same time they emphasize that humans and non-humans are really in a symbiotic relationship. I do not have a lot of patience for that kind of argument, especially if you think of the state of the world in times of climate change, with huge extractive industries, the global mining boom as the result of the growing Chinese and Indian economies, the upsurge of fracking which seems to have provided us with an almost indefinite supply of fossil fuels. I feel it is irresponsible to question the responsibility of humanity. And yet, however much I may love my cat and acknowledge that humans and domestic animals have coevolved, we must realize that human beings are special. There is no chimpanzee or the smartest of dolphins able to say, “well my dad was poor but at least he was honest”. Only human beings can create that sentence: our sense of moral responsibility is unique and we must live up to it.

DL: Speaking of moral responsibility: I understand you had an important role in the coming to terms with the Breivik tragedy…

THE: Yes, I spent about three weeks after the terrorist attack and doing little other than talking to foreign journalist and writing articles for foreign newspapers. They contacted me not only because I have been writing about identity politics and nationalism, but also because Breivik had a sort of soft spot for me. He sees me as a symbol of everything that has gone wrong in Norway, a sort of spineless effeminate cosmopolitan middle class multiculturalist Muslim lover. There has been a hardening; polarization is much more strong now than it was only 20 years.

In the 1990s, people who had said things like I do about cultural diversity would perhaps have been accused of being naive, whereas in the last few years we are increasingly being accused of being traitors – which is different. Breivik quoted me about 15 times in his manifesto and his YouTube film. You might say he had a mild obsession with me. Eventually, I was called in as a witness in the trial by the defence. Originally, the psychiatrists who examined Breivik concluded he was insane. He should have received psychiatric treatment, and thus could not be punished for what he did. Of course, at the certain level one has to be insane to kill so many innocent young people. But his ideas are not the result of mental illness, they are quite widely shared. We have websites in Norway, with 20,000 unique visits every week, that were among his favourite websites. The defence wanted to call me in as a witness to testify that although he may be a murderer, his ideas are very common, they are shared by thousands of others. Which is true, but in the end I did not have to go because they had a long list of witnesses and they only used some of them.

DL: Were you scared by this kind of exposure?

THE: Not really. But in the first few weeks after the terrorist attack when everybody in Norway was in a state of shock, I noticed that some people at the university whom I hardly knew would come over to me and were behaving unusually nicely. I realized they probably thought that was the last time they see of me because I was probably next on the dead list. Then things went back to normal. You can never feel entirely safe. Breivik reminds us that even a handful of people can do immense harm, just like the terrorist attack in United States in 2001. It has probably made society a little bit less trusting, a bit more worried. But I do not think about my own person security. About the security of my family, yes, but not mine. You cannot. That would be allowing the other people to win.

DL: Would you say that Norway has learnt anything from this tragedy?

THE: Unfortunately not. There was a chance that we could have, and many of us were hoping that an attack like that should make us understand that the idea of ethnic purity is absurd, crazy and not feasible in this century. We hoped that we could now get together to sit down and discuss these issues in a more measured, serious, balanced way, but it did not happen. It took only a couple of weeks for the usual political polarization to return. If anything, people who were against immigration became even more aggressive than before. We missed an opportunity there.

DL: You are coming to Ljubljana to a convention with the provocative title, Why the world needs anthropologists. But isn’t it a bit pretentious to suggest that the world needs us at all?

THE: That is an excellent question. I do not know whether the world needs novelists, but it probably does not does need poets. It can easily manage without them. And yet, the human need for meaning is just as powerful as the need for food and shelter. The kind of meaning sensitive and intelligent people can provide is especially important, when we need to reformulate the main questions.

I sometimes think about students of mine who are never going to work as anthropologist, they will find jobs elsewhere, but studying anthropology enables them to lead a better life because they understand more of themselves and of the world. I even think that doing anthropology makes you a better person: just like reading novels, it enables you to identify with others. When you then see the refugees in the Mediterranean, at least you know, it could have been me. You think that because you relate to people in all parts of the world. I think the main sort of moral message of anthropology perhaps is that all human lives have value, no matter how alien no matter how strange it might appear. So yes, I think world needs anthropologists, just as it needs novelists and poets.

Livro traz relato sóbrio e claro sobre aquecimento global (Folha de S.Paulo)

Denis Russo Burgierman

19/03/2016

Quer um conselho sobre o mercado imobiliário? Não compre terreno baixo em frente ao mar : você vai pagar caro hoje e ele vai deixar de existir qualquer dia desses. Mas a verdade é que o traçado da costa não é a única coisa que vai mudar profundamente no mundo nos próximos anos por causa do clima. Quase tudo vai mudar: nenhuma história é tão importante quanto essa para o nosso futuro. Daí a importância de ler “A Espiral da Morte”.

O livro é resultado de 15 anos de trabalho do jornalista Claudio Angelo, ao longo dos quais ele fez cinco viagens às regiões polares das duas pontas do mundo, andando no gelo com cientistas do clima, voando com pesquisadores da Nasa, navegando com militantes do Greenpeace, conversando com caçadores de urso-polar.

Claudio é um sujeito comprometido com os temas que cobre: é o único repórter que já conheci que julgou importante tomar aulas de tupi. E ele tem vocação trágica: se apaixona por esses assuntos terríveis, essas tragédias de aparência irremediável (índios, clima…).

Claro que o resto de nós está ocupado demais com nossos Facebooks, com as campanhas do nosso time na Libertadores, com os roteiros rocambolescos da disputa política. Não temos tempo de ficar nos preocupando com o destino dos índios, dos ursos polares, dos icebergs, das baleias.

Divulgação
Larsen B, geleira que se rompeu em 2002
Larsen B, geleira que se rompeu em 2002

O que a maioria de nós nem suspeita é que essa história que A Espiral da Morte conta vai afetar profundamente a nossa vida – já está afetando. E também a vida dos nossos filhos, e a dos tataranetos dos tataranetos dos nossos filhos, e a dos nossos descendentes 40 mil anos no futuro.

O livro não é um manifesto para que juntos salvemos a natureza, nem uma profecia sombria do apocalipse que nos aguarda. É um relato sóbrio, tranquilo, claro, e com algum humor (negro) de tudo o que sabemos sobre o que está acontecendo neste exato momento nos lugares mais frios da Terra.

Enquanto damos like nuns posts e bloqueamos outros, bilhões de toneladas de gelo socado acumulado ao longo de milênios lentamente derretem nos extremos norte e sul do planeta, e vão ficando a cada dia mais escorregadios.

Não é muito fácil prever exatamente como o gelo vai derreter, como qualquer um que já bebeu uma dose de uísque sabe, mas já está absolutamente claro que está derretendo. Claudio sabe bem disso: ele ouviu o barulho (o estrondo de cachoeira vindo de debaixo do chão de uma geleira).

Um dia desses, pedações do tamanho de países inteiros começarão a despencar no mar como pingões de chuva, na Groenlândia e na Antártida. E aí o oceano do mundo vai subir, talvez vários metros. Em muitos lugares o ar vai secar. Tufões e furacões vão ficar cada vez mais frequentes, assim como epidemias espalhadas por mosquitos.

Enfim, não é exatamente uma leitura leve para levantar o astral – como aliás Claudio cuidou de deixar bem claro já no título. Mas, ainda assim, espero que muita gente leia.

Afinal, é meio assustador que algo tão enormemente importante, que definirá tão profundamente o destino de nossa espécie, seja tão pouco compreendido por nós humanos vivendo sobre a Terra.

É assustador que todos os grandes partidos políticos do Brasil façam projetos de grandes obras ignorando completamente o fato consumado de que o clima está mudando. É assustador que o desenho de nossas cidades, nosso modelo produtivo e nossa matriz energética continuem extremamente desorganizados, despreparados para a crise ambiental que já começou a chegar.

Eu estava lendo o catatau de quase 500 páginas anteontem, quando minha filha de 3 anos, decidida a evitar que eu cumprisse o prazo desta resenha para a Folha, entrou no meu quarto e pediu para eu contar a história do livro para ela. Quando ela viu a capa – um massivo iceberg groenlandês flutuando na água verde-esmeralda –, comentou: “que lindo, papai”. Sorri e olhei para ela. Subitamente, me dei conta de algo que nunca havia me ocorrido: talvez chegue um dia na vida dela em que será muito difícil encontrar uma única praia para ela se deitar ao sol.
DENIS RUSSO BURGIERMAN é diretor de Redação da revista “Superinteressante”

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A ESPIRAL DA MORTE
AUTOR Claudio Angelo
EDITORA Companhia das Letras
PREÇO R$ 59,90 (496 págs.)
AVALIAÇÃO Muito bom

Sociedade civil integrará Comissão de REDD+ (MMA)

JC 5369, 8 de março de 2016

Seleção será nesta sexta-feira (11/03), em Brasília, durante reunião ampliada do Fórum Brasileiro de Mudanças Climáticas

Serão selecionados, nesta sexta-feira (11/03), os dois representantes da sociedade civil que participarão da Comissão Nacional para Redução das Emissões de Gases de Efeito Estufa Provenientes do Desmatamento e da Degradação Florestal, Conservação dos Estoques de Carbono Florestal, Manejo Sustentável de Florestas e Aumento de Estoques de Carbono Florestal – REDD+ (CONAREDD).

A seleção ocorrerá em reunião ampliada do Fórum Brasileiro de Mudanças Climáticas (FBMC), marcada para ocorrer no Ministério do Meio Ambiente (MMA), em Brasília. A expectativa é que a seleção contemple a participação dos diversos setores interessados na implantação de REDD+ pelo Brasil, em especial comunidades tradicionais e povos indígenas. O encontro incluirá a escolha de dois suplentes para a comissão.

Estratégia

O Decreto no 8.576, de 26 de novembro de 2015, instituiu a CONAREDD, que tem a responsabilidade de coordenar, acompanhar e monitorar a implantação da Estratégia Nacional para REDD+. A comissão também tem a finalidade de coordenar a elaboração dos requisitos para o acesso a pagamentos por resultados de políticas e ações de REDD+ no Brasil, reconhecidos pela Convenção-Quadro das Nações Unidas sobre Mudança do Clima.

De acordo com o decreto, a CONAREDD contará com dois representantes titulares e dois suplentes da sociedade civil organizada brasileira. Conforme determinação do MMA, caberá ao o FBMC nominar esses representantes, buscando assegurar o maior grau possível de representatividade entre os diversos segmentos da sociedade civil.

SERVIÇO:

Reunião do Fórum Brasileiro de Mudanças Climáticas (FBMC)

Data: Sexta-feira, 11 de março, às 10h

Local: Auditório do Edifício Anexo do Ministério do Meio Ambiente – SEPN 505, Bloco B, Edifício Marie Prendi Cruz, Asa Norte, Brasília-DF.

Programação:

– Discussão da implantação da Comissão Nacional para REDD+;

– Mapeamento do perfil necessário à representação da sociedade civil na CONAREDD;

– Indicação de dois representantes titulares e dois suplentes da sociedade civil organizada brasileira de acordo com o Decreto no 8.576.

Ascom/MMA

Nasa aims to move Earth (The Guardian)

Scientists’ answer to global warming: nudge the planet farther from Sun

Special report: global warming

, science editor

Sunday 10 June 2001 Last modified on Friday 1 January 2016 


Scientists have found an unusual way to prevent our planet overheating: move it to a cooler spot.

All you have to do is hurtle a few comets at Earth, and its orbit will be altered. Our world will then be sent spinning into a safer, colder part of the solar system.

This startling idea of improving our interplanetary neighbourhood is the brainchild of a group of Nasa engineers and American astronomers who say their plan could add another six billion years to the useful lifetime of our planet – effectively doubling its working life.

‘The technology is not at all far-fetched,’ said Dr Greg Laughlin, of the Nasa Ames Research Center in California. ‘It involves the same techniques that people now suggest could be used to deflect asteroids or comets heading towards Earth. We don’t need raw power to move Earth, we just require delicacy of planning and manoeuvring.’

The plan put forward by Dr Laughlin, and his colleagues Don Korycansky and Fred Adams, involves carefully directing a comet or asteroid so that it sweeps close past our planet and transfers some of its gravitational energy to Earth.

‘Earth’s orbital speed would increase as a result and we would move to a higher orbit away from the Sun,’ Laughlin said.

Engineers would then direct their comet so that it passed close to Jupiter or Saturn, where the reverse process would occur. It would pick up energy from one of these giant planets. Later its orbit would bring it back to Earth, and the process would be repeated.

In the short term, the plan provides an ideal solution to global warming, although the team was actually concerned with a more drastic danger. The sun is destined to heat up in about a billion years and so ‘seriously compromise’ our biosphere – by frying us.

Hence the group’s decision to try to save Earth. ‘All you have to do is strap a chemical rocket to an asteroid or comet and fire it at just the right time,’ added Laughlin. ‘It is basic rocket science.’

The plan has one or two worrying aspects, however. For a start, space engineers would have to be very careful about how they directed their asteroid or comet towards Earth. The slightest miscalculation in orbit could fire it straight at Earth – with devastating consequences.

There is also the vexed question of the Moon. As the current issue of Scientific American points out, if Earth was pushed out of its current position it is ‘most likely the Moon would be stripped away from Earth,’ it states, radically upsetting out planet’s climate.

These criticisms are accepted by the scientists. ‘Our investigation has shown just how delicately Earth is poised within the solar system,’ Laughlin admitted. ‘Nevertheless, our work has practical implications. Our calculations show that to get Earth to a safer, distant orbit, it would have to pass through unstable zones and would need careful nurturing and nudging. Any alien astronomers observing our solar system would know that something odd had occurred, and would realise an intelligent lifeform was responsible.

‘And the same goes for us. When we look at other solar systems, and detect planets around other suns – which we are now beginning to do – we may see that planet-moving has occurred. It will give us our first evidence of the handiwork of extraterrestrial beings.’

Oxford’s Halley Professor on How the Climate Challenge Could Derail a Brilliant Human Destiny (Dot Earth/NYT)

By 

FEBRUARY 15, 2016 9:04 AM February 15, 2016 9:04 am

Updated, 11:51 p.m. | Sustained large investments in fundamental science paid off in a big way last week, as Dennis Overbye so beautifully reported in The Times’s package on confirmation of Einstein’s 1916 conclusion that massive moving objects cause ripples in spacetime — gravitational waves.

Raymond Pierrehumbert, a climate scientist and the Halley Professor of Physics at Oxford University.

Raymond Pierrehumbert, a climate scientist and the Halley Professor of Physics at Oxford University. Credit Eva Dalin, Stockholm University

This finding, and the patient investments and effort through which it was produced, came up in the context of humanity’s global warming challenge in an email exchange a few days ago with Raymond T. Pierrehumbert, a veteran climate scientist who was recently appointed the Halley Professor of Physics at Oxford University.*

The common context is the importance of sustained engagement on a big challenge — whether it is intellectual, as in revealing spacetime ripples, or potentially existential, as in pursuing ways to move beyond energy choices that are reshaping Earth for hundreds of generations to come.

I reached out to Pierrehumbert because he is one of many authors of “Consequences of twenty-first-century policy for multi-millennial climate and sea-level change,” an important new Nature Climate Change analysis reinforcing past work showing a very, very, very long impact (tens of millenniums) on the Earth system — climatic, coastal and otherwise — from the carbon dioxide buildup driven by the conversion, in our lifetimes, of vast amounts of fossil fuels into useful energy.

The core conclusion:

This long-term view shows that the next few decades offer a brief window of opportunity to minimize large-scale and potentially catastrophic climate change that will extend longer than the entire history of human civilization thus far. [Read the Boston College news release for even more.]**

summary from Columbia University’s Lamont-Doherty Earth Observatory captures the basic findings:

Humans have been burning fossil fuels for only about 150 years, yet that has started a cascade of profound changes that at their current pace will still be felt 10,000 years from now.

Here’s a snippet from a figure in the paper showing how arguments about the pace of coastal change between now and 2100 distract from a profoundly clear long-term reality — that there will be no new “normal” coastal for millenniums, even with aggressive action to curb emissions:

Photo

A detail from a figure in a new paper shows the projected possible rise in sea levels over the next 10,000 years from today under four levels of emissions of heat-trapping greenhouse gases. The highest blue line at right is 50 meters (164 feet) above today’s sea level. Even the lowest scenario eventually floods most of today’s coastal cities.<br /><br />The darker line to the left of today marks sea levels over the last 10,000 years — a geological epoch called the Holocene. The figures below show ice amounts on Greenland and Antarctica today and if humans burn most known fossil fuels. <a href="http://www.nature.com/nclimate/journal/vaop/ncurrent/fig_tab/nclimate2923_F2.html">The full figure and legend is here.</a>
A detail from a figure in a new paper shows the projected possible rise in sea levels over the next 10,000 years from today under four levels of emissions of heat-trapping greenhouse gases. The highest blue line at right is 50 meters (164 feet) above today’s sea level. Even the lowest scenario eventually floods most of today’s coastal cities.

The darker line to the left of today marks sea levels over the last 10,000 years — a geological epoch called the Holocene. The figures below show ice amounts on Greenland and Antarctica today and if humans burn most known fossil fuels. The full figure and legend is here.Credit Nature Climate Change

I’d asked Pierrrehumbert to reflect on the time-scale conundrum laid out in the Nature Climate Change paper in the context of another important and provocative proposal by Princeton’s Robert Socolow, published in the Bulletin of the Atomic Scientists in December, proposing a new field of inquiry — Destiny Studies — to examine the tough intersection of ethics, risk perception and science. His essay is titled, “Climate change and Destiny Studies: Creating our near and far futures.” Here’s the abstract:

Climate change makes stringent demands on thinking about our future. We need two-sided reasoning to contend equitably with the risks of climate change and the risks of “solutions.” We need to differentiate the future 500 years from now and 50 years from now. This essay explores three pressing climate change issues, using both the 500-year and the 50-year time frames: sea level rise, the nuclear power “solution,” and fossil carbon abundance.

Here’s Pierrehumbert’s “Your Dot” contribution, tying together these elements:

The day of the release of the spectacular LIGO gravitational wave discovery is a good time to be pondering human destiny, the great things we can achieve as a species if only we don’t do ourselves in, and the responsibility to provide a home for future generations to flourish in. It is beyond awesome that we little lumps of protoplasm squinting out at the Universe from our shaky platform in the outskirts of an insignificant galaxy can, after four decades of indefatigable effort, detect and characterize a black hole merger over a billion light years away.

This is just one of the most dramatic examples of what we are capable of, given the chance to be our best selves. In science, I’d rate the revolution in detecting and characterizing exoplanets way up there as well. There’s no limit to what we can accomplish as a species.

But we have to make it through the next two hundred years first, and this will be a crucial time for humanity. This is where Destiny Studies and our paper on the Anthropocene come together. The question of why we should care about the way we set the climate of the Anthropocene is far better answered in terms of our vision for the destiny of our species than it is in terms of the broken calculus of economics and discounting.

For all we know, we may be the only sentience in the Galaxy, maybe even in the Universe. We may be the only ones able to bear witness to the beauty of our Universe, and it may be our destiny to explore the miracle of sentience down through billions of years of the future, whatever we may have turned into by that time. Even if we are not alone, it is virtually certain that every sentient species will bring its own unique and irreplaceable perspectives to creativity and the understanding of the Universe around us.

Thinking big about our destiny, think of this: the ultimate habitability catastrophe for Earth is when the Sun leaves the main sequence and turns into a Red Giant. That happens in about 4 billion years. However, long before that — in only about 500 million years — the Sun gets bright enough to trigger a runaway greenhouse effect and turn us into Venus, sterilizing all life on Earth. We waste half the main sequence lifetime of the Sun.

However, if we last long enough, technology will make it easy to block enough sunlight to save the Earth from a runaway, buying us another 4 billion years of habitability. That’s the only kind of albedo-modification geoengineering I could countenance, and by the time that is needed, presumably we’ll have the wisdom to deploy it safely and the technology to make it robust.

But we have to make it through the next 200 years first.

If we do what humanity has always done in the past, we’re likely to burn all the fossil fuels, and then have a hard landing at a time of high population, with an unbearable climate posing existential risks, at just the time when we’re facing the crisis fossil fuels running out. That will hardly make for ideal conditions under which to decarbonize, and there is a severe risk civilization will collapse, leaving our descendants with few resources to deal with the unbearable environment we will have bequeathed them.

It’s been pointed out that fossil fuels came in just about when we had run out of whale oil, but the whales had been hunted to the brink of extinction when that happened. If we do the same with coal, it’s not going to make for a pretty transition. With regard to the Anthropocene, it’s true that given a thousand years or so — if technological civilization survives — it becomes likely that we would develop ways to remover CO2 from the atmosphere and accelerate the recovery to more livable conditions. But if things get bad enough in the next two hundred years, we may never have that chance.

The alternative future is one where we decide to make the transition to a carbon-free economy before we’re forced into it by the depletion of fossil fuels. We’re going to run out anyway, and will need to learn to do without fossil fuels, so why not get weaned early, before we’ve trashed the climate? If we do that, we might not just buy ourselves a world, but a whole Universe.

Shorthand summary: Can we do better than bacteria smeared on agar?

This passage from a 2011 post, “Confronting the Anthropocene,” conveys my sense of the core focus of “destiny studies”:

We’re essentially in a race between our potency, our awareness of the expressed and potential ramifications of our actions and our growing awareness of the deeply embedded perceptual and behavioral traits that shape how we do, or don’t, address certain kinds of risks [or time scales].

Another author of the Nature Climate Change paper, Daniel Schrag of Harvard, gave a highly relevant talk at the Garrison Institute a couple of years ago in which he raised, but did not answer, a question I hope you’ll all ponder:

Is there a moral argument for some threshold of environmental conditions that we must preserve for future generations?

This would be a cornerstone question in destiny studies. I moderated a conversation on this question and the rest of the lecture with Schrag and Elke U. Weber of Columbia University. I hope you can spare some time to watch.

There are plenty of efforts to build such a field, including Oxford’s Future of Humanity Institute, the Frederick S. Pardee Center for the Study of the Longer-Range Future at Boston University and the Arizona State University effort I described in this post: “Building Visions of Humanity’s Climate Future – in Fiction and on Campus.”

Here are other relevant past pieces:

2015 – “Avoiding a Climate Inferno

2013 – “Could Climate Campaigners’ Focus on Current Events be Counterproductive?

2011 – “Pedal to the Metal

2010 – “Which Comes First – Peak Everything or Peak Us?

2009 – “Puberty on the Scale of a Planet

Updated, 11:50 p.m. | David Roberts at Vox today put the Nature Climate Change paper in political context when he wrote: “The U.S. presidential election will matter for 10,000 years.” Read the rest here.

Footnotes |

** This excerpt from the paper was added at 1:36 p.m.

*Pierrehumbert has contributed valuable insights here in the past, writes on Slate on occasion and is a fine accordion player. He contributed sensitively wrought parts on a song on my first album.

O painel do clima quer falar com você (Observatório do Clima)

15/02/2016

O australiano John Cook, editor do site Skeptical Science, fala durante encontro do IPCC em Oslo. Foto: Claudio Angelo/OC

O australiano John Cook, editor do site Skeptical Science, fala durante encontro do IPCC em Oslo. Foto: Claudio Angelo/OC

IPCC faz sua primeira reunião sobre comunicação disposto a mudar a cultura do segredo e a linguagem arcana de seus relatórios – mas esbarra numa estrutura de governança conservadora.

Por Claudio Angelo, do OC, em Oslo –

Luís Bernardo Valença, protagonista do romance Equador, do português Miguel de Souza Tavares, recebe do rei de Portugal uma missão virtualmente impossível: assumir o governo de São Tomé e Príncipe para convencer os compradores ingleses de cacau de que não existe trabalho escravo nas ilhas – e, ao mesmo tempo, garantir que o sistema de trabalho escravo não mude, de forma a não prejudicar a economia local.

A história guarda uma analogia com o momento pelo qual passa o IPCC, o painel do clima da ONU, que na semana passada realizou em Oslo, na Noruega, a primeira reunião de sua história dedicada à comunicação. O comitê internacional de cientistas, agraciado com o Prêmio Nobel da Paz em 2007, reconhece que a forma como se comunica com seus diversos públicos precisa mudar: os sumários de seus relatórios de avaliação são indecifráveis para leigos e para os próprios formuladores de políticas públicas a quem supostamente se dedicam; as decisões são tomadas em reuniões fechadas, o que alimenta rumores de que o painel é ora uma conspiração de ambientalistas para distorcer a ciência, ora uma vítima de ações de governos para aguar conclusões impactantes sobre a gravidade das mudanças do clima; a maneira como a incerteza e o risco são expressos pelo painel é bizantina.

A vontade de abrir-se mais ao público, porém, esbarra no conservadorismo do próprio painel, que preserva um modo de operação da década de 1990, quando lançou seu primeiro relatório de avaliação). Os métodos, as regras e os rituais do IPCC precisam permanecer os mesmos – e seus líderes parecem não querer abrir mão disso. Ao mesmo tempo, eles mesmos pedem mais transparência e mais acessibilidade. Qual é a chance de isso dar certo?

O próprio encontro de Oslo pode ser um termômetro. Foram convidados a participar cerca de 50 especialistas em comunicação do mundo inteiro e mais duas dezenas de autoridades do próprio painel. A reunião foi a primeira em toda a história do IPCC a ser transmitida ao vivo pela internet. Mas isso que só aconteceu depois da cobrança de algumas personalidades da área, como o jornalista americano Andrew Revkin. Ela foi aberta também pela internet pelo presidente do painel, o sul-coreano Hoesung Hwang. Os co-presidentes dos três grupos de trabalho que cuidam de avaliar os três grandes aspectos da mudança do clima (a base física, impactos e vulnerabilidades e mitigação) estiveram presentes o tempo todo, assim como dois dos três vice-presidentes, a americana Ko Barrett e o malês Youba Sokona. Cientistas que coordenaram a produção do AR5, o quinto relatório do IPCC, também estiveram nos dois dias de encontro.

Um consenso importante formado em Oslo foi que a comunicação precisa integrar o processo de produção dos relatórios desde o início. O modelo atual seguido pelo IPCC consiste em preparar primeiro os relatórios e então divulgá-los aos diversos públicos – tomadores de decisão, imprensa e o público geral. É o que Paul Lussier, especialista em mídia da Universidade Yale, chamou de “passar batom num porco” durante sua apresentação.

Enfeitar o suíno, até aqui, tem sido a receita para o fiasco de comunicação do painel. Isso foi mais ou menos matematicamente demonstrado pelo cientista ambiental português Suraje Dessai, professor da Universidade de Leeds, no Reino Unido, e coautor do AR5 (Quinto Relatório de Avaliação do IPCC, publicado entre 2013 e 2014). Uma análise dos sumários do IPCC conduzida por Dessai e colegas com a ajuda de softwares que olham simplicidade e legibilidade foi publicada no ano passado no periódico Nature Climate Change. O trabalho mostrou que não apenas o IPCC é menos legível do que outras publicações científicas, como também o grau de compreensibilidade dos sumários despencou de 1990 para cá.

Uma das recomendações feitas ao final do encontro, e que serão encaminhadas à plenária do IPCC em abril, é para que se incorporem comunicadores profissionais, jornalistas de ciência, psicólogos e antropólogos desde a chamada fase de “definição do escopo” dos relatórios. Isso começaria no AR6, o Sexto Relatório de Avaliação do IPCC, que deverá ser publicado em algum momento entre 2020 e 2022. Essa própria definição, que hoje é feita pelas autoridades do painel e pelos governos, poderá vir a ser realizada numa espécie de consulta pública – na qual diferentes atores, desde a sociedade civil até empresários e mesmo crianças, digam o que querem que o painel avalie sobre a mudança climática. Tamanha abertura seria uma revolução no IPCC, rompendo a lógica professoral que impera hoje na definição das perguntas às quais os relatórios tentam responder.

Outra sugestão, apresentada por um grupo que discutiu as relações entre o IPCC e os meios de comunicação, foi para que os rascunhos dos sumários executivos sejam abertos para o público antes da aprovação final pelos governos. Cada sumário passa por uma série de rascunhos até chegar ao formato final de revisão, que é enviado aos governos para comentários. Os sumários são aprovados por governos e cientistas na plenária do IPCC, onde recebem alterações finais. A regra é que os governos modifiquem muito o texto, mas – e este é um “mas” importante, porque é o que define a credibilidade do IPCC – a palavra final é sempre dos cientistas.

Os rascunhos hoje não são públicos, mas qualquer pessoa pode solicitar ao IPCC fazer parte do comitê de revisores – e ganham, assim, acesso aos documentos. Em 2013, um negacionista do clima vazou em seu blog uma versão do AR5, alegando que o painel estava escondendo evidências de que o aquecimento global se devia a raios cósmicos (não estava). A proposta apresentada em Oslo foi para que os rascunhos de revisão fossem tornados públicos, de forma a minimizar o impacto de vazamentos e a conter desinformação na imprensa.

Outras recomendações feitas em Oslo vão de dar ao site do IPCC uma nova interface pública até produzir infográficos animados da ciência avaliada pelos relatórios.

Na prática, porém, a teoria é outra: um dos dogmas do IPCC é que ele não pode produzir prescrições políticas, ou seja, precisa se limitar a dizer aos países o que acontece com o mundo em cada cenário de emissões e o que é preciso fazer para atingir níveis de emissão x, y ou z no futuro. A rigor, o painel do clima não pode incitar as pessoas a combater a mudança climática – isso seria uma posição de militância. Pior, entre os mais de 150 governos que integram o IPCC e de fato mandam nele (daí a sigla significar Painel Intergovernamental sobre Mudanças Climáticas) há os que não querem resolver o problema, porque vivem da sua causa – os combustíveis fósseis. Essas são amarras importantes à comunicação.

Outro problema é que o IPCC ainda vive no século XX, num sentido bem real. Enquanto a comunicação hoje é digital, o painel do clima decidiu, por consenso, que seus relatórios são aprovados linha por linha pelos governos – e isso significa caneta e papel. Não há nem sequer método para submeter um infográfico animado à plenária, caso alguém ache que é o caso usar esse tipo de recurso no AR6. Sugestões de ter uma equipe de vídeo acompanhando o “making of” dos relatórios foram rejeitadas no passado, porque algumas pessoas no painel não queriam que ninguém ficasse “espionando” seu trabalho. E por aí vai.

O IPCC foi criado em 1988, mas só ganhou uma estratégia de comunicação em 2012. Tem um longo aprendizado pela frente e precisa começar de algum lugar. Pessoas com quem conversei em Oslo disseram duvidar que a maior parte das recomendações seja acatada. Mas é auspicioso, num momento em que o mundo se prepara para implementar o Acordo de Paris, que o templo do conhecimento climático esteja disposto a embarcar na tarefa da comunicação. Ela é mais necessária do que nunca agora. (Observatório do Clima/ #Envolverde)

* O jornalista viajou a convite do IPCC.

** Publicado originalmente no site Observatório do Clima.

Impact of human activity on local climate mapped (Science Daily)

Date: January 20, 2016

Source: Concordia University

Summary: A new study pinpoints the temperature increases caused by carbon dioxide emissions in different regions around the world.


This is a map of climate change. Credit: Nature Climate Change

Earth’s temperature has increased by 1°C over the past century, and most of this warming has been caused by carbon dioxide emissions. But what does that mean locally?

A new study published in Nature Climate Change pinpoints the temperature increases caused by CO2 emissions in different regions around the world.

Using simulation results from 12 global climate models, Damon Matthews, a professor in Concordia’s Department of Geography, Planning and Environment, along with post-doctoral researcher Martin Leduc, produced a map that shows how the climate changes in response to cumulative carbon emissions around the world.

They found that temperature increases in most parts of the world respond linearly to cumulative emissions.

“This provides a simple and powerful link between total global emissions of carbon dioxide and local climate warming,” says Matthews. “This approach can be used to show how much human emissions are to blame for local changes.”

Leduc and Matthews, along with co-author Ramon de Elia from Ouranos, a Montreal-based consortium on regional climatology, analyzed the results of simulations in which CO2 emissions caused the concentration of CO2 in the atmosphere to increase by 1 per cent each year until it reached four times the levels recorded prior to the Industrial Revolution.

Globally, the researchers saw an average temperature increase of 1.7 ±0.4°C per trillion tonnes of carbon in CO2 emissions (TtC), which is consistent with reports from the Intergovernmental Panel on Climate Change.

But the scientists went beyond these globally averaged temperature rises, to calculate climate change at a local scale.

At a glance, here are the average increases per trillion tonnes of carbon that we emit, separated geographically:

  • Western North America 2.4 ± 0.6°C
  • Central North America 2.3 ± 0.4°C
  • Eastern North America 2.4 ± 0.5°C
  • Alaska 3.6 ± 1.4°C
  • Greenland and Northern Canada 3.1 ± 0.9°C
  • North Asia 3.1 ± 0.9°C
  • Southeast Asia 1.5 ± 0.3°C
  • Central America 1.8 ± 0.4°C
  • Eastern Africa 1.9 ± 0.4°C

“As these numbers show, equatorial regions warm the slowest, while the Arctic warms the fastest. Of course, this is what we’ve already seen happen — rapid changes in the Arctic are outpacing the rest of the planet,” says Matthews.

There are also marked differences between land and ocean, with the temperature increase for the oceans averaging 1.4 ± 0.3°C TtC, compared to 2.2 ± 0.5°C for land areas.

“To date, humans have emitted almost 600 billion tonnes of carbon,” says Matthews. “This means that land areas on average have already warmed by 1.3°C because of these emissions. At current emission rates, we will have emitted enough CO¬2 to warm land areas by 2°C within 3 decades.”


Journal Reference:

  1. Martin Leduc, H. Damon Matthews, Ramón de Elía. Regional estimates of the transient climate response to cumulative CO2 emissionsNature Climate Change, 2016; DOI: 10.1038/nclimate2913

Derretimento do Ártico atingiu nível recorde (O Globo)

Por Renato Grandelle, 16/12/2015

Embarcação atravessa geleira em setembro: nova rota marítima facilita comércio entre países – Divulgação/Greenland Travel

RIO – Maior vitrine do aquecimento global, o Ártico viu uma elevação recorde de seus termômetros nos últimos meses. A temperatura do ar na região entre outubro de 2014 e setembro de 2015 foi de 1,3 grau Celsius acima da média desde 1900, quando começaram os registros. O aumento total da temperatura neste período foi de 3 graus Celsius.

De acordo com o levantamento “Arctic Report Card 2015”, divulgado ontem pela Administração Nacional de Oceanos e Atmosfera dos EUA (Noaa), a expansão máxima do gelo no Ártico ocorreu em 25 de fevereiro, duas semanas antes do normal. Sua extensão foi a menor desde o início dos registros, em 1979.

O gelo remanescente mudou de perfil. É cada vez mais “novo”, e, por isso, fino e vulnerável ao aquecimento. Sua porção que tem menos de um ano de idade é duas vezes maior do que a vista há 30 anos. Em algumas regiões do Alasca e da Groenlândia, a temperatura da superfície do mar aumenta cerca de 0,5 grau Celsius por década desde 1982.

— Não sabemos por que a extensão do gelo ocorreu tão cedo desta vez — admite Martin Jeffries, pesquisador de Previsão Global e do Ártico no Programa de Pesquisa Naval de Arlington, na Virgínia (EUA), e um dos autores do relatório, assinado por 70 cientistas de dez países — Veremos cada vez mais mudanças nos ecossistemas da região, que serão transformados pelo aumento da temperatura do ar.

A Noaa alerta que o Ártico está aquecendo duas vezes mais rápido do que outras partes do mundo. Se a temperatura do planeta avançar 2 graus Celsius — o máximo considerado tolerável pelos cientistas —, os termômetros naquela região se elevariam entre 4 e 5 graus Celsius.

No relatório, o órgão americano afirma que o aumento da temperatura do Ártico tem implicações em áreas como segurança global, clima e comércio. Por isso, é necessário formular projetos de fornecimento de informações para o poder público, a indústria e a sociedade civil.

No auge do verão, mais da metade da superfície da camada de gelo da Groenlândia derreteu — 22 de suas 45 maiores geleiras encolheram, em relação aos registros do ano passado.

— As geleiras perdem massa conforme a água escorre para o oceano — conta Jeffries. — Seu derretimento, mesmo que seja parcial, vai contribuir para a elevação do nível do mar e será uma ameaça global para as comunidades costeiras e diversos ecossistemas.

O permafrost — como é conhecido o gelo permanente sobre o solo — também começa a ceder, especialmente no Canadá e na Sibéria, liberando mais metano e gás carbônico para a atmosfera.

Coordenador-geral do Instituto Nacional de Ciência e Tecnologia da Universidade Federal do Rio Grande do Sul, Jefferson Cardia Simões avalia que o levantamento da Noaa é um retrato do “novo Ártico”:

— Nunca estes fenômenos adversos ocorreram tão rapidamente — alerta. — A mudança principal é a retração do mar congelado durante o verão. Em 20 anos, a extensão mínima do gelo passou de sete milhões para 4,5 milhões de quilômetros quadrados.

Quando há menos gelo marinho, o oceano absorve mais energia solar. Seu aquecimento afeta zooplânctons e fitoplânctons, a base da cadeia alimentar.

Jeffries destaca que espécies maiores, como peixes e morsas, também já sofrem com a mudança da temperatura:

— As morsas são grandes mamíferos marinhos que usam o gelo do mar para o acasalamento, locomoção e abrigo contra tempestades e predadores. Agora, estas atividades estão seriamente prejudicadas — alerta. — Nos últimos anos, um grande número de espécimes teve de se deslocar por terra até o Alasca. Houve problemas como a superlotação e a dificuldade para encontrar alimentos.

Os peixes de regiões temperadas, como o bacalhau e o cantarilho, estão migrando para o Norte, competindo por alimentos com outras espécies que habitam o Ártico.

A migração contínua de peixes para o Norte poderia ser mais um dos motivos para conflito dos países ao redor do Ártico. O derretimento do gelo abriu espaço para cada vez mais atividades econômicas na região, como a pesca oceânica, a extração de petróleo e gás e a navegação.

— O aumento da temperatura do Ártico pode desencadear uma série de questões geopolíticas — assinala Simões. — O mar aberto no verão criou uma nova rota para navegações dos EUA e Europa para a Ásia. Até a China, que não é um país da região, quer se aproveitar deste caminho, o que provoca ressalvas da Rússia. As nações também tentam expandir sua zona econômica exclusiva, para que possam explorar com liberdade os recursos minerais locais. Há mudanças de estratégias militares e questionamentos de soberania.

CONSEQUÊNCIAS NO BRASIL

As consequências climáticas, políticas e econômicas do aquecimento do Ártico atraem países distantes do gelo. O Brasil participou este ano pela primeira vez de uma reunião da ONG Arctic Cicle, financiada pelo governo da Islândia. Simões integrou a delegação nacional:

— Recomendamos que o Brasil monitore como será o futuro da região. O Ártico pode ser palco de muitas transformações que abalarão todos nós. A economia global, por exemplo, será alterada se for viável explorar gás e óleo na região. E ainda devemos estudar se o aquecimento registrado lá pode afetar os trópicos. É possível que haja uma relação entre o desaparecimento do gelo e o regime de chuvas no Brasil.

Para Simões, os relatórios do Painel Intergovernamental sobre Mudanças Climáticas foram “conservadores” ao abordar o que pode acontecer com o Ártico.

— Considerando o modo como ele se aquece, e as metas insuficientes estabelecidas por cada país durante a Conferência do Clima, o Ártico pode não congelar mais no verão até 2040 — lamenta. — Muitas alterações atuais ainda são desconhecidas. Mas já vemos que a circulação de ventos está alterada e provoca ondas de frio intensas no Hemisfério Norte.

Acordo de Paris é uma nova Revolução Industrial, diz especialista (Agência Brasil)

O texto final do acordo estabelece o objetivo de manter o aumento da temperatura média global abaixo de 2 graus Celsius em relação aos níveis pré-industriais e garantir esforços para limitar o aumento da temperatura a 1,5ºC

“É como se fosse uma nova Revolução Industrial”, disse o coordenador do Sistema de Estimativa de Emissões de Gases de Efeito Estufa do Observatório do Clima, Tasso Azevedo, na segunda-feira, 14, ao falar sobre o Acordo de Paris, primeiro acordo global sobre o clima, aprovado no último sábado (12) na 21ª Conferência das Partes das Nações Unidas sobre Mudanças Climáticas (COP21), na capital francesa, por 195 países e a União Europeia, para entrar em vigor em 2020.

“Começamos uma nova era onde as pessoas estão alinhadas sabendo para onde ir. Isso faz com que os investimentos comecem a ser feitos nessa direção e provavelmente daqui a 30 ou 40 anos, vamos lembrar esse final de ano como o momento em que mudamos a forma de se desenvolver. É como se fosse uma nova Revolução Industrial, agora com um objetivo atrelado a um desenvolvimento e tecnologia, que é a sustentabilidade e um clima seguro para todos”, afirmou.

O texto final do acordo estabelece o objetivo de manter o aumento da temperatura média global abaixo de 2 graus Celsius (ºC) em relação aos níveis pré-industriais e garantir esforços para limitar o aumento da temperatura a 1,5ºC.

Segundo Azevedo, entretanto, as metas atuais levam a um aumento de cerca de 3ºC, mas também definem, claramente, uma direção de trabalho. “O que é importante é que, em Paris, se definiu um modo de operar que faz com que se faça uma revisão, progressivamente, em ciclos de cinco em cinco anos para que os países possam ir aprofundando as metas de forma que nos próximos ciclos possamos caminhar no sentido de limitar a 2ºC”, disse.

As Contribuições Nacionalmente Determinadas Pretendidas (INDCs) apresentadas pelos países também foram importantes para o sucesso do acordo, segundo os especialistas. “É um acordo aprovado por unanimidade, ninguém deixou de ser escutado. As contribuições foram voluntárias e é aquilo que foi apresentado voluntariamente que se torna, então, obrigatório”, disse Tasso Azevedo.

“Grande parte do sucesso desta COP21 se deve a questões de procedimento. A estratégia das INDCs ajudou a romper a lógica binária de negociações entre países desenvolvidos versus países em desenvolvimento”, diz, em nota, o diretor de Políticas Públicas do WWF-Brasil, Henrique Lian.

Em vídeo divulgado pelas redes sociais, o diretor-presidente do Instituto Ethos, Jorge Abrahão, disse que as empresas privadas também assumiram posições importantes para redução de emissões, mas que ainda existem desafios. Entre eles estão a adaptação, que é uma oportunidade muito grande para as empresas, segundo ele; a questão dos acessos aos financiamentos; a transparência; e a construção de políticas públicas, “é algo que o governo deixa claro, a importância das empresas estarem construindo conjuntamente as políticas públicas”, afirmou.

Segundo Abrahão, entretanto, há outro tema, pouco tratado, que é o estilo de vida da população. “Nosso modo de viver é algo que nos traz desafios, seja do ponto de vista individual, seja do ponto de vista das empresas”, disse.

Para Tasso Azevedo, do Observatório do Clima, as ações do dia a dia são importantes para redução das emissões, quando, por exemplo, as pessoas escolhem andar de transporte coletivo, usar o aquecedor solar ou consumir produtos de origem sustentável. Ele diz ainda que o País pode implementar ações imediatas, como o desmatamento zero, o investimento forte na agricultura de baixo carbono e na recuperação de pastagens degradadas e o investimento em energias renováveis.

Principais pontos do Acordo de Paris, segundo Ministério do Meio Ambiente:

– Fortalece a implementação da Convenção-Quadro das Nações Unidas sobre Mudança do Clima (UNFCCC) sob os seus princípios.

– Busca limitar o aumento da temperatura média global a bem abaixo de 2ºC em relação aos níveis pré-industriais e empreender esforços para limitar o aumento da temperatura a 1,5ºC.

– Promove o financiamento coletivo de um piso de US$ 100 bilhões por ano para países em desenvolvimento, considerando suas necessidades e prioridades.

– Estabelece processo que apresenta as contribuições nacionalmente determinadas (INDCs), com metas individuais de cada país para a redução de emissões de gases de efeito estufa.

– Cria um mecanismo de revisão a cada cinco anos dos esforços globais para frear as mudanças do clima.

Agência Brasil

Aquecimento global: um estranho evento em Paris (Outras Palavras)

POR GEORGE MONBIOT

Derretimento de glaciares, cada vez mais comum em diversas partes do mundo. Para Monbiot, Um aquecimento máximo de 1,5ºC, alvo improvável a que agora se aspira, era plenamente realizável quando da primeira conferência sobre mudança climática da ONU em Berlim, em 1995

Cúpula do Clima foi, ao mesmo tempo, avanço e desastre. Formou-seconsenso inédito sobre gravidade da ameaça. Mas lobbies bloquearam as medidas indispensáveis para enfrentá-la

Por George Monbiot | Tradução: Inês Castilho

Comparado com aquilo que poderia ter sido, é um milagre. Comparado com o que deveria ter sido, é um desastre.

Dentro dos estreitos limites em que se deram as negociações, o desenho do acordo sobre o clima na ONU, em Paris, é um grande sucesso. O alívio e autocongratulação com que o texto final foi saudado reconhece o fracasso em Copenhague, há seis anos, quando as negociações correram descontroladamente durante algum tempo, até desmoronar. O acordo de Paris ainda espera a adoção formal, mas sua aspiração ao limite de 1,5ºC para o aquecimento global, depois de tantos anos de rejeição dessa meta, pode ser vista no quadro de uma vitória retumbante. Nesse e em outros sentidos, o texto final é mais forte do que foi antecipado pela maioria das pessoas.

Fora desse quadro, contudo, ele parece outra coisa. Duvido que qualquer um dos negociadores acredite que, como resultado desse acordo, o aquecimento global não irá superar 1,5ºC. Como o preâmbulo do documento reconhece, em vista das débeis promessas que os governos levaram a Paris, mesmo 2ºC seria loucamente ambicioso. Ainda que algumas nações tenham negociado de boa fé, é provável que os resultados reais nos levem a níveis de colapso climático que serão perigosos para todos e letais para alguns. Os governos falam em não onerar as futuras gerações com dívidas. Mas acabam de concordar em sobrecarregar nossos filhos e netos com um legado muito mais perigoso: o dióxido de carbono produzido pela queima contínua de combustíveis fósseis, e os impactos de longo prazo que isso irá exercer sobre o clima global.

Com 2ºC de aquecimento, grandes partes da superfície do mundo irão se tornar menos habitáveis. Os habitantes dessas regiões provavelmente enfrentarão extremos climáticos selvagens: secas piores em alguns lugares, enchentes mais devastadoras em outros, tempestades mais fortes e, potencialmente, graves impactos no abastecimento de alimentos. Ilhas e cidades costeiras correm o risco de desaparecer sob as ondas, em muitas partes do mundo.

A combinação de mares acidificados, morte de corais e derretimento do Ártico pode significar o colapso de toda a cadeia alimentar marinha. Em terra, as florestas tropicais tendem a ser reduzidas, os rios podem minguar e os desertos, aumentar. Extinção em massa será provavelmente a marca da nossa era. Essa é a cara do que os alegres delegados à conferência de Paris enxergaram como sucesso.

Os próprios termos do documento final poderão fracassar? Também é possível. Embora os primeiros rascunhos especificassem datas e percentuais, o texto final visa apenas “alcançar o pico global de emissão de gases de efeito de estufa o mais rápido possível”. É algo que pode significar qualquer coisa e nada.

Para ser justo, o fracasso não deve ser debitado às conversações de Paris, mas a todo o processo. Um aquecimento máximo de 1,5ºC, meta improvável a que agora se aspira, era plenamente realizável quando da primeira conferência sobre mudança climática da ONU em Berlim, em 1995. Houve duas décadas de procrastinação, causadas por lobbies – abertos, encobertos e frequentemente sinistros. Além disso, os governos relutaram em explicar a seus eleitorados que a fixação pelo curto prazo tem custos a longo prazo. O resultado é que três quartos da janela de oportunidade agora se fecharam. As negociações de Paris são as melhores que jamais tivemos. E isso é um sinal terrível.

O resultado, avançado em comparação a todos os anteriores, deixa-nos com um acordo quase comicamente distorcido. Enquanto as negociações sobre quase todos os outros riscos globais buscam enfrentar ambos os lados do problema, o processo climático da ONU preocupa-se inteiramente com consumo de combustíveis fósseis, enquanto ignora sua produção.

Em Paris, os delegados concordaram solenemente em cortar a demanda de petróleo e carvão, mas em casa busca-se maximizar a oferta. O governo do Reino Unido impôs até mesmo a obrigação legal de “maximizar a recuperação econômica” do petróleo e gás do país, com a Lei de Infraestrutura de 2015. A extração de combustíveis fósseis é um fato duro. Mas não faltam fatos suaves ao acordo de Paris: promessas escorregadias e que podem ser desfeitas. Até que resolvam manter os combustíveis no solo, os governos continuarão a sabotar o acordo que acabam de fazer.

É o melhor que se poderia conseguir, nas condições atuais. Nos EUA, nenhum provável sucessor de Barack Obama demonstrará o mesmo compromisso. Em países como o Reino Unido, grandes promessas no exterior são minadas por orçamentos domésticos esquálidos. Seja o que for que aconteça agora, não seremos bem-vistos pelas gerações que nos sucederem.

Então está bem, deixe que os delegados se congratulem por um acordo melhor do que poderia ser esperado. E que o temperem com um pedido de desculpas a todos aqueles a quem a conferência irá trair.

Nations Approve Landmark Climate Accord in Paris (New York Times)

LE BOURGET, France — With the sudden bang of a gavel Saturday night, representatives of 195 nations reached a landmark accord that will, for the first time, commit nearly every country to lowering planet-warming greenhouse gas emissions to help stave off the most drastic effects of climate change.

The deal, which was met with an eruption of cheers and ovations from thousands of delegates gathered from around the world, represents a historic breakthrough on an issue that has foiled decades of international efforts to address climate change.

Traditionally, such pacts have required developed economies like the United States to take action to lower greenhouse gas emissions, but they have exempted developing countries like China and India from such obligations.

The accord, which United Nations diplomats have been working toward for nine years, changes that dynamic by requiring action in some form from every country, rich or poor.

Scientists and leaders said the talks here represented the world’s last, best hope of striking a deal that would begin to avert the most devastating effects of a warming planet.

Mr. Ban said there was “no Plan B” if the deal fell apart. The Eiffel Tower was illuminated with that phrase Friday night.

The new deal will not, on its own, solve global warming. At best, scientists who have analyzed it say, it will cut global greenhouse gas emissions by about half enough as is necessary to stave off an increase in atmospheric temperatures of 2 degrees Celsius or 3.6 degrees Fahrenheit. That is the point at which, scientific studies have concluded, the world will be locked into a future of devastating consequences, including rising sea levels, severe droughts and flooding, widespread food and water shortages and more destructive storms.

But the Paris deal could represent the moment at which, because of a shift in global economic policy, the inexorable rise in planet-warming carbon emissions that started during the Industrial Revolution began to level out and eventually decline.

“The world finally has a framework for cooperating on climate change that’s suited to the task,” said Michael Levi, an expert on energy and climate change policy at the Council on Foreign Relations. “Whether or not this becomes a true turning point for the world, though, depends critically on how seriously countries follow through.”

Just five years ago, such a deal seemed politically impossible. A similar 2009 climate change summit meeting in Copenhagen collapsed in acrimonious failure after countries could not unite around a deal.

Unlike in Copenhagen, Foreign Minister Laurent Fabius of France said on Saturday, the stars for this assembly were aligned.

The changes that led to the Paris accord came about through a mix of factors, particularly major shifts in the domestic politics and bilateral relationships of China and the United States, the world’s two largest greenhouse gas polluters.

Since the Copenhagen deal collapsed, scientific studies have confirmed that the earliest impacts of climate change have started to sweep across the planet. While scientists once warned that climate change was a problem for future generations, recent scientific reports have concluded that it has started to wreak havoc now, from flooding in Miami to droughts and water shortages in China.

In a remarkable shift from their previous standoffs over the issue, senior officials from both the United States and China praised the Paris accord on Saturday night.

Representatives of the “high-ambition coalition,” including Foreign Minister Tony de Brum of the Marshall Islands, left, wore lapel pins made of dried coconut fronds, a symbol of Mr. de Brum’s country.CreditJacky Naegelen/Reuters 

Secretary of State John Kerry, who has spent the past year negotiating behind the scenes with his Chinese and Indian counterparts in order to help broker the deal, said, “The world has come together around an agreement that will empower us to chart a new path for our planet.”

Xie Zhenhua, the senior Chinese climate change negotiator, said, “The agreement is not perfect, and there are some areas in need of improvement.” But he added, “This does not prevent us from marching forward with this historic step.” Mr. Xie called the deal “fair and just, comprehensive and balanced, highly ambitious, enduring and effective.”

Negotiators from many countries have said that a crucial moment in the path to the Paris accord came last year in the United States, when Mr. Obama enacted the nation’s first climate change policy — a set of stringent new Environmental Protection Agency regulations designed to slash greenhouse gas pollution from the nation’s coal-fired power plants. Meanwhile, in China, the growing internal criticism over air pollution from coal-fired power plants led President Xi Jinping to pursue domestic policies to cut coal use.

In November 2014 in Beijing, Mr. Obama and Mr. Xi announced that they would jointly pursue plans to cut domestic greenhouse gas emissions. That breakthrough announcement was seen as paving the way to the Paris deal, in which nearly all the world’s nations have jointly announced similar plans.

The final language did not fully satisfy everyone. Representatives of some developing nations expressed consternation. Poorer countries had pushed for a legally binding provision requiring that rich countries appropriate a minimum of at least $100 billion a year to help them mitigate and adapt to the ravages of climate change. In the final deal, that $100 billion figure appears only in a preamble, not in the legally binding portion of the agreement.

Despite the historic nature of the Paris climate accord, its success still depends heavily on two factors outside the parameter of the deal: global peer pressure and the actions of future governments.

The core of the Paris deal is a requirement that every nation take part. Ahead of the Paris talks, governments of 186 nations put forth public plans detailing how they would cut carbon emissions through 2025 or 2030.

Those plans alone, once enacted, will cut emissions by half the levels required to stave off the worst effects of global warming. The national plans vary vastly in scope and ambition — while every country is required to put forward a plan, there is no legal requirement dictating how, or how much, countries should cut emissions.

Thus, the Paris pact has built in a series of legally binding requirements that countries ratchet up the stringency of their climate change policies in the future. Countries will be required to reconvene every five years, starting in 2020, with updated plans that would tighten their emissions cuts.

Countries will also be legally required to reconvene every five years starting in 2023 to publicly report on how they are doing in cutting emissions compared to their plans. They will be legally required to monitor and report on their emissions levels and reductions, using a universal accounting system.

That hybrid legal structure was explicitly designed in response to the political reality in the United States. A deal that would have assigned legal requirements for countries to cut emissions at specific levels would need to go before the United States Senate for ratification. That language would have been dead on arrival in the Republican-controlled Senate, where many members question the established science of human-caused climate change, and still more wish to thwart Mr. Obama’s climate change agenda.

So the individual countries’ plans are voluntary, but the legal requirements that they publicly monitor, verify and report what they are doing, as well as publicly put forth updated plans, are designed to create a “name-and-shame” system of global peer pressure, in hopes that countries will not want to be seen as international laggards.

That system depends heavily on the views of the future world leaders who will carry out those policies. In the United States, every Republican candidate running for president in 2016 has publicly questioned or denied the science of climate change, and has voiced opposition to Mr. Obama’s climate change policies.

In the Senate, Mitch McConnell, the Republican leader, who has led the charge against Mr. Obama’s climate change agenda, said, “Before his international partners pop the champagne, they should remember that this is an unattainable deal based on a domestic energy plan that is likely illegal, that half the states have sued to halt, and that Congress has already voted to reject.”

There were few of those concerns at the makeshift negotiations center here in this suburb north of Paris. The delegates rose to their feet in applause to thank the French delegation, which drew on the finest elements of the country’s longstanding traditions of diplomacy to broker a deal that was acceptable to all sides.

France’s European partners recalled the coordinated Nov. 13 terrorist attacks in Paris, which killed 130 people and threatened to cast a shadow over the negotiations. But, bound by a collective good will toward France, countries redoubled their efforts.

“This demonstrates the strength of the French nation and makes us Europeans all proud of the French nation,” said Miguel Arias Cañete, the European Union’s commissioner for energy and climate action.

Yet amid the spirit of success that dominated the final hours of the negotiations, Mr. Arias Cañete reminded delegates that the accord was the beginning of the real work. “Today, we celebrate,” he said. “Tomorrow, we have to act. This is what the world expects of us.”

Correction: December 12, 2015. An earlier version of this article misstated part of the name of the agency for which Michael Levi works. It is the Council on Foreign Relations, not the Center on Foreign Relations.

Sewell Chan, Melissa Eddy, Justin Gillis and Stanley Reed contributed reporting.