Arquivo da tag: ciência

New Study Shows Yoga Has Healing Powers (National Geographic)

Student Nicola Protetch ( 17) does the bow posture with a smile as she takes part in a yoga class.

Yoga practitioners, like these students in the bow posture, could experience reduced stress and better sleep.

PHOTOGRAPH BY RENE JOHNSTON, GETTY IMAGES

Susan Brink

for National Geographic

PUBLISHED FEBRUARY 7, 2014

The more we learn about yoga, the more we realize the benefits aren’t all in the minds of the 20 million or so devotees in the U.S. Yoga helps people to relax, making the heart rate go down, which is great for those with high blood pressure. The poses help increase flexibility and strength, bringing relief to back pain sufferers.

Now, in the largest study of yoga that used biological measures to assess results, it seems that those meditative sun salutations and downward dog poses can reduce inflammation, the body’s way of reacting to injury or irritation.

That’s important because inflammation is associated with chronic diseases including heart disease, diabetes, and arthritis. It’s also one of the reasons that cancer survivors commonly feel fatigue for months, even years, following treatment.

Researchers looked at 200 breast cancer survivors who had not practiced yoga before. Half the group continued to ignore yoga, while the other half received twice-weekly, 90-minute classes for 12 weeks, with take-home DVDs and encouragement to practice at home.

According to the study, which was led by Janice Kiecolt-Glaser, professor of psychiatry and psychology at Ohio State University, and published in the Journal of Clinical Oncology, the group that had practiced yoga reported less fatigue and higher levels of vitality three months after treatment had ended.

Laboratory Proof

But the study didn’t rely only on self-reports. Kiecolt-Glaser’s husband and research partner, Ronald Glaser of the university’s department of molecular virology, immunology, and medical genetics, went for stronger, laboratory proof. He examined three cytokines, proteins in the blood that are markers for inflammation.

Blood tests before and after the trial showed that, after three months of yoga practice, all three markers for inflammation were lower by 10 to 15 percent. That part of the study offered some rare biological evidence of the benefits of yoga in a large trial that went beyond people’s own reports of how they feel.

No one knows exactly how yoga might reduce inflammation in breast cancer survivors, but Kiecolt-Glaser lays out some research-based suggestions. Cancer treatment often leaves patients with high levels of stress and fatigue, and an inability to sleep well. “Poor sleep fuels fatigue, and fatigue fuels inflammation,” she says. Yoga has been shown to reduce stress and help people sleep better.

Other smaller studies have shown, by measuring biological markers, that expert yoga practitioners had lower inflammatory responses to stress than novice yoga practitioners did; that yoga reduces inflammation in heart failure patients; and that yoga can improve crucial levels of glucose and insulin in patients with diabetes.

Yoga for Other Stresses

Cancer is an obvious cause of stress, but recent research has pointed to another contributing factor: living in poverty. Maryanna Klatt, an associate professor of clinical family medicine at Ohio State University, has taken yoga into the classrooms of disadvantaged children. In research that has not yet been published, she found that 160 third graders in low-income areas who practiced yoga with their teacher had self-reported improvements in attention.

“Their teachers liked doing it right before math, because then the kids focused better on the math work,” she says. “Telling a kid to sit down and be quiet doesn’t make sense. Have them get up and move.”

While it would be too complicated and intrusive to measure biological responses to yoga in schoolchildren, Klatt has done similar research on surgical nurses, who are under the daily stress of watching suffering and death. She said she found a 40 percent reduction in their salivary alpha amylase, a measure of the fight-or-flight response to stress.

And she’s about to begin teaching yoga to garbage collectors in the city of Columbus before they head out on their morning shift. At the moment, her arrangement with the city is not part of a study. She just hopes to make their lives less stressful. And she does not plan to check their inflammatory response, though she admits she’d love to.

U.S. Plan to Lift Wolf Protections in Doubt After Experts Question Science (Science)

8 February 2014 10:45 am

Canis lupus

Wikimedia/USFWS. Canis lupus

The ongoing battle over a proposal to lift U.S. government protections for the gray wolf (Canis lupus) across the lower 48 states isn’t likely to end quickly. An independent, peer-review panel yesterday gave a thumbs-down to the U.S. Fish and Wildlife Service’s (USFWS’s) plan to delist the wolf. Although not required to reach a consensus, the four researchers on the panel were unanimous in their opinion that the proposal “does not currently represent the ‘best available science.’ ”

“It’s stunning to see a pronouncement like this—that the proposal is not scientifically sound,” says Michael Nelson, an ecologist at Oregon State University, Corvallis, who was not one of the reviewers. Many commentators regard it as a major setback for USFWS, which stumbled last year in a previous attempt to get the science behind its proposal reviewed.

USFWS first released its plan for removing the gray wolf from the endangered species list in June 2013. The plan also called for adding the Mexican gray wolf, a subspecies that inhabits the southwest, to the protected list. At the time, there were approximately 6000 wolves in some Western and upper midwestern states; federal protections were removed from the gray wolf in six of those states in 2011. More than 1 million people have commented on the plan. But regulations also require that the agency invite researchers outside of the agency to assess the proposal’s scientific merit.

At its core, the USFWS proposal relies on a monograph written by its own scientists. They asserted that a different (and controversial) species, the eastern wolf (Canis lupus lycaon) and not the gray wolf, had inhabited the Midwest and Northeast. If correct, then the agency would not need to restore the gray wolf population in 22 eastern states, where gray wolves are no longer found.

But the four reviewers, which included specialists on wolf genetics, disagreed with USFWS’s idea of a separate eastern wolf, stating that the notion “was not universally accepted and that the issue was ‘not settled’ ”—an opinion shared by other researchers. “The designation of an ‘eastern wolf’ is not well-supported,” says Carlos Carroll, a conservation biologist at the Klamath Center for Conservation Research in Orleans, California, who was not a member of the review panel.

Overall, the agency’s “driving goal seemed to be to identify the eastern wolf as a separate species, and to use that taxonomic revision to delist the gray wolf,” says Robert Wayne, a conservationist geneticist at the University of California (UC), Los Angeles, and one of the reviewers. If that were to happen, he says, it would be the first time that a species was removed from the federal endangered species list via taxonomy. “It should happen when a species is fully recovered,” Wayne says, “and the gray wolf is not. It’s not in any of those 22 eastern states—that’s why it’s endangered there.”

The panel’s statements will make it difficult, outside observers say, for USFWS to move forward with its proposal. The Endangered Species Act requires that decisions to remove a species from federal protection be based on the “best available science.”  And because the reviewers have concluded this is not the case, “you’ve got to think that the [service] must go back to the drawing board,” says Andrew Wetzler, director of land and wildlife programs for the Natural Resources Defense Council in Chicago, Illinois, an organization that advocates for continued federal protections for the wolf.

Gray wolves were exterminated across most of the lower 48 states in the last century. They were placed on the endangered species list in 1975, and successfully reintroduced into Yellowstone National Park and Idaho in 1995. Gray wolves also made a comeback in the Great Lakes region, where they now can be legally hunted. Idaho, Wyoming, and Montana also have wolf hunting and trapping seasons. Smaller gray wolf populations that aren’t legally hunted are found in Washington and Oregon.

The agency’s reaction to the peer-review comments has been somewhat muted. In a press statement, it thanked the National Center for Ecological Analysis and Synthesis at UC Santa Barbara for conducting the review. USFWS Director Dan Ashe noted that “[p]eer review is an important step in our efforts to assure that the final decision on our proposal to delist the wolf is based on the best available scientific and technical information,” and that the panel’s comments will be incorporated in the ongoing process of reaching a decision on the fate of the gray wolves.

The peer-review report is now available online. USFWS will reopen the public comment period on its delisting proporal on 10 February, and will accept comments through 27 March.

Casa Branca anuncia a criação de sete centros climáticos (O Globo)

JC e-mail 4890, de 07 de fevereiro de 2014

Núcleos ajudarão agricultores a evitarem a ocorrência de eventos extremos, como seca, incêndios e enchentes

Na esteira da aprovação no Senado americano de uma nova lei agrícola, conhecida como Farm Bill, a Casa Branca anunciou esta quarta-feira a criação de sete “centros climáticos” para ajudar os agricultores e comunidades rurais a responderem aos riscos de mudanças climáticas, inclusive secas, ocorrência de pestes, incêndios e enchentes.
Os centros climáticos serão nos estados de Iowa, New Hampshire, Carolina do Norte, Oklahoma, Oregon, Colorado e Novo México.

Autoridades do governo americano descreveram a iniciativa como uma das ações executivas que o presidente Barack Obama tomará para atacar as mudanças climáticas sem um movimento do Congresso.

A criação de centros climáticos é considerado um passo limitado, mas é parte de uma campanha mais ampla do Executivo para usar sua autoridade, onde for possível, em políticas ligadas às mudanças do clima.

O governo tenta, também, ganhar apoio político para engajar-se em outros projetos, principalmente na elaboração de uma forte regulamentação que determine cortes de emissões de carbono em usinas do país. A criação do programa está sendo debatida na Agência de Proteção Ambiental.

A criação dos centros climáticos foi anunciada pelo secretário de Agricultura, Tom Villsack. A intenção do governo é que o programa ajude agricultores de cada região a adaptarem-se às mudanças climáticas, antes da elaboração de um projeto mais ambicioso.

– As mudanças climáticas são um desafio novo e complexo enfrentado pelos agricultores, e seus impactos são sentidos nas florestas e nas áreas de cultivo.

(Carol Davenport do New York Times/O Globo)
http://oglobo.globo.com/ciencia/casa-branca-anuncia-criacao-de-sete-centros-climaticos-11526131#ixzz2se5UT4FG

Nature can, selectively, buffer human-caused global warming, say scientists (Science Daily)

Date: February 2, 2014

Source: Hebrew University of Jerusalem

Summary: Can naturally occurring processes selectively buffer the full brunt of global warming caused by greenhouse gas emissions resulting from human activities? Yes, says a group of researchers in a new study.

As the globe warms, ocean temperatures rise, leading to increased water vapor escaping into the atmosphere. Water vapor is the most important greenhouse gas, and its impact on climate is amplified in the stratosphere. Credit: © magann / Fotolia

Can naturally occurring processes selectively buffer the full brunt of global warming caused by greenhouse gas emissions resulting from human activities?

Yes, find researchers from the Hebrew University of Jerusalem, Johns Hopkins University in the US and NASA’s Goddard Space Flight Center.

As the globe warms, ocean temperatures rise, leading to increased water vapor escaping into the atmosphere. Water vapor is the most important greenhouse gas, and its impact on climate is amplified in the stratosphere.

In a detailed study, the researchers from the three institutions examined the causes of changes in the temperatures and water vapor in the tropical tropopause layer (TTL). The TTL is a critical region of our atmosphere with characteristics of both the troposphere below and the stratosphere above.

The TTL can have significant influences on both atmospheric chemistry and climate, as its temperature determines how much water vapor can enter the stratosphere. Therefore, understanding any changes in the temperature of the TTL and what might be causing them is an important scientific question of significant societal relevance, say the researchers.

The Israeli and US scientists used measurements from satellite observations and output from chemistry-climate models to understand recent temperature trends in the TTL. Temperature measurements show where significant changes have taken place since 1979.

The satellite observations have shown that warming of the tropical Indian Ocean and tropical Western Pacific Ocean — with resulting increased precipitation and water vapor there — causes the opposite effect of cooling in the TTL region above the warming sea surface. Once the TTL cools, less water vapor is present in the TTL and also above in the stratosphere.

Since water vapor is a very strong greenhouse gas, this effect leads to a negative feedback on climate change. That is, the increase in water vapor due to enhanced evaporation from the warming oceans is confined to the near- surface area, while the stratosphere becomes drier. Hence, this effect may actually slightly weaken the more dire forecasted aspects of an increasing warming of our climate, the scientists say.

The researchers are Dr. Chaim Garfinkel of the Fredy and Nadine Herrmann Institute of Earth Sciences at the Hebrew University and formerly of Johns Hopkins University, Dr. D. W. Waugh and Dr. L. Wang of Johns Hopkins, and Dr. L. D. Oman and Dr. M. M. Hurwitz of the Goddard Space Flight Center. Their findings have been published in theJournal of Geophysical Research: Atmospheres, and the research was also highlighted in Nature Climate Change.

Journal References:

  1. C. I. Garfinkel, D. W. Waugh, L. D. Oman, L. Wang, M. M. Hurwitz. Temperature trends in the tropical upper troposphere and lower stratosphere: Connections with sea surface temperatures and implications for water vapor and ozoneJournal of Geophysical Research: Atmospheres, 2013; 118 (17): 9658 DOI: 10.1002/jgrd.50772
  2. Qiang Fu. Ocean–atmosphere interactions: Bottom up in the tropicsNature Climate Change, 2013; 3 (11): 957 DOI: 10.1038/nclimate2039

A dura realidade (Ciência Hoje)

[Uso generalizante, e portanto improdutivo, do conceito de “mito”]

Criação de mitos formaliza o desejo inconsciente de tranquilizar nossas mentes. História da ciência reúne vários exemplos do que parece ser uma necessidade humana: a produção de heróis.

Por: Franklin Rumjanek

Publicado em 28/01/2014 | Atualizado em 29/01/2014

A dura realidade

Há uma tendência de exacerbar o papel de certos personagens, como no caso de Fleming: não bastou descobrir a penicilina; atribui-se a ele sua produção em larga escala, o que foi feito por Howard Florey. (foto: Wikimedia Commons – CC BY SA 3.0)

A criação de mitos parece ser uma necessidade humana, algo que formaliza, em palavras ou em crenças, o desejo inconsciente de preencher algum recanto intranquilo de nossas mentes. A criação de heróis é um exemplo típico. Se eles não realizaram de fato certos feitos, o imaginário popular trata de preencher, de modo convincente, essa lacuna. Assim, os mitos duram até que alguém decida investigar a veracidade dos relatos.

Em interessante comentário na revista científica Nature (v. 502, nº 7.469, p. 32, 2013), Heloise Dufour e Sean Carroll abordam essa tendência de exacerbar o papel histórico de certos personagens, focando em Joseph Meister, Alexander Fleming e John Snow (ver ‘História da ciência e mitos’ em Ciência Hoje n° 309, disponível para assinantes no Acervo Digital).

Por vezes os mitos são impessoais e, nesse caso, têm funções variadas, desde validar preconceitos até trazer a esperança de uma vida longa e de qualidade

A participação de cada um deles em eventos que tangenciaram a ciência foi amplificada. No caso de Fleming, por exemplo, não bastou a descoberta da penicilina: atribui-se a ele a produção do medicamento em grandes quantidades, o que, na verdade, foi feito por Howard Florey. Este, sim, calcula-se, salvou mais de 80 milhões de vidas. Fleming teria também salvo a vida de Sir Winston Churchill duas vezes. Uma de afogamento e outra com a penicilina. Pura lenda urbana.

Por vezes os mitos são impessoais e, nesse caso, têm funções variadas, desde validar preconceitos até trazer a esperança de uma vida longa e de qualidade. O ressurgimento de pesquisas que abordam a relação entre o DNA e o comportamento, tema tratado aqui em várias colunas, é um exemplo da necessidade humana de, com base na ciência, reforçar não necessariamente a curiosidade que deve nortear os caminhos da investigação, mas o ideário previamente implantado em nossas mentes.

Níveis de tabu

Em outro trabalho, na mesma edição da Nature, Erika C. Hayden avalia os níveis de tabu gerados por tipos diferentes de trabalhos científicos em genética. Os que envolvem a pesquisa do chamado quociente de inteligência (QI) atingem, segundo a autora, ‘alto nível’ de tabu, superado apenas por qualquer projeto que envolva o estudo de raças humanas (‘nível muito alto’).

Em contraste, estudos sobre a herança genética da violência, ou da orientação sexual, merecem ‘nível moderado’, talvez porque o atual convívio cotidiano com ambas as manifestações ajude a diluí-las. Hayden acrescenta que esse tipo de mito é reforçado com cada vez mais força por conta da doutrina de que a genética é sinônimo de destino. Apesar de contarmos hoje com a sofisticada tecnologia que destrincha os genomas em pouco tempo e que, sistematicamente, mostra-se incapaz de fornecer subsídios que sustentem os projetos do tipo tabu, a noção de que somos todos escravos do DNA não esmorece.

Algo semelhante acontece com a informática. Possivelmente como resultado da grande influência desta em nossas vidas, cresce o contingente dos que precisam acreditar que o mundo virtual terá um papel importante na conquista da longevidade do cérebro. Embora tenha sido mostrado, já em 2010, que não há correlação entre bom desempenho mental e a prática de jogos de computador, a lenda recrudesce.

NeuroRacerA tentativa de manter idosos jogando o NeuroRacer para melhorar sua capacidade de realizar multitarefas busca o endosso científico, mas ainda não sobrevive a um exame mais rigoroso. (foto: YouTube.com)

A nova tentativa de manter idosos horas a fio diante de computadores jogando o NeuroRacer, para melhorar sua capacidade de realizar multitarefas, é o tema de Alison Abbott, também na Nature (v. 501, nº 7.465, p. 18, 2013). Essa prática contemporânea de transformar-nos a todos em malabares mentais busca o endosso científico, mas ainda não sobrevive a um exame mais rigoroso. Abbott alerta que neurocientistas e psicólogos acreditam que tanto o poder de concentração quanto a capacidade de memória são parâmetros fixos, que não se modificam, seja qual for o estímulo. Esses cientistas, porém, confrontam-se não apenas com os fabricantes de jogos de computador, mas também com o poder da mitologia, do desejo coletivo. De fato, é muito difícil convencer nossos pares de que somos mortais e que nossos últimos dias serão cercados de senescência.

Franklin Rumjanek
Instituto de Bioquímica Médica
Universidade Federal do Rio de Janeiro
Texto originalmente publicado na CH 310 (dezembro de 2013).

Projeto que proíbe o uso de animais em testes de cosméticos poderá ter votação mais rápida (Agência Câmara)

JC e-mail 4881, de 27 de janeiro de 2014

O objetivo é que a matéria seja votada ainda neste ano

O autor de projeto que proíbe o uso de animais em testes de produtos cosméticos (PL 6602/13), deputado Ricardo Izar (PSD-SP), pediu ao presidente da Câmara, Henrique Eduardo Alves, que seu projeto seja desvinculado (desapensado) de outro mais antigo que institui o Código Federal de Bem-Estar Animal (PL 215/07). O objetivo é que a matéria seja votada ainda neste ano.

O projeto de Izar proíbe a utilização de animais em atividades de ensino, pesquisas e testes laboratoriais com substâncias para o desenvolvimento de produtos de uso cosmético em humanos e aumenta os valores de multa nos casos de violação de seus dispositivos.

O debate sobre o uso de animais em testes e pesquisas de cosméticos ganhou força após o caso do Instituto Royal. Em outubro de 2013, 178 beagles e sete coelhos usados em pesquisas foram retirados por ativistas e moradores de São Roque, no interior paulista, de uma das sedes do instituto.

Ricardo Izar participou de Comissão Externa da Câmara para acompanhar o caso. Ele considera que o Brasil está atrasado neste aspecto. “Não só moralmente por causa do respeito aos animais, mas mercadologicamente. Hoje, as empresas que produzem cosméticos não podem exportar para a Comunidade Europeia porque lá é proibida a comercialização de produtos cosméticos que usaram animais em testes ou nos seus ingredientes. Então, mercadologicamente, nós também estamos atrasados.”

Legislação de SP
São Paulo é o primeiro estado do Brasil a adotar uma legislação que veta o uso de animais em testes laboratoriais de produtos estéticos em desenvolvimento. Testes com animais envolvendo questões de saúde ainda poderão ser feitos. A medida ainda será regulamentada, mas empresas que desobedecerem ficarão sujeitas à multa de cerca de R$ 1 milhão por animal usado em teste. O estabelecimento terá a suspensão temporária do alvará de funcionamento e, em casos de reincidência, a multa dobra e a suspensão será definitiva.

O Conselho Nacional de Controle de Experimentação Animal (Concea) ainda avalia as propostas de legislação e não adotou posição oficial. O coordenador do órgão, Mauro Granjeiro, antecipa que a proibição adotada em São Paulo pode representar risco para população por impedir uma fiscalização adequada dos órgãos de vigilância sanitária. “Ela impede completamente a realização de qualquer teste in vivo com cosméticos. Isso acaba impactando em potenciais análises dos laboratórios oficiais de toxicologia que porventura tenham necessidade de verificar a toxicidade de um produto cosmético que tenha ido ao mercado e provocado reações adversas na população. Nós não temos ainda no mundo capacidade de substituir completamente os ensaios em animais.”

Mauro Granjeiro lembra ainda que a Europa proibiu os testes em animais após mais de dez anos de adaptação dos laboratórios.

Há 21 projetos em discussão na Câmara que tratam do assunto, todos tramitando em conjunto. As propostas devem ser analisadas por uma comissão especial.
Íntegra da proposta:

(Geórgia Moraes/Agência Câmara – 24/01)

IPCC: próximos 15 anos serão vitais para frear aquecimento global (CarbonoBrasil)

20/1/2014 – 12h54

por Jéssica Lipinski , do CarbonoBrasil

secawiki 300x204 IPCC: próximos 15 anos serão vitais para frear aquecimento global

Foto: Wikimedia commons

Rascunho do novo relatório da entidade afirma que evitar as piores consequências das mudanças climáticas custará até 4% da produção econômica mundial, valor que aumentará se demorarmos para agir.

Diversos veículos da imprensa internacional divulgaram nos últimos dias dados do próximo relatório do Painel Intergovernamental sobre Mudanças Climáticas (IPCC), que será publicado oficialmente apenas em abril.

De acordo com essas informações, o que o IPCC destaca é que a menos que o mundo aja agora para frear as emissões de gases do efeito estufa (GEEs), os efeitos negativos do aquecimento global representarão enormes desafios para a humanidade ainda neste século, tornando-se cada vez mais caros e difíceis de serem resolvidos.

Segundo o documento, manter o aquecimento global dentro de limites considerados toleráveis, algo perto de dois graus Celsius, vai exigir investimentos bilionários, grandes reduções nas emissões de GEEs e soluções tecnológicas caras e complexas para retirar tais gases da atmosfera.

Tudo isso deve ser feito nos próximos 15 anos, caso contrário será ainda mais difícil lidar com a questão. “Adiar a mitigação até 2030 aumentará os desafios… e reduzirá as opções”, alerta o sumário do relatório.

O estudo aponta que uma das principais razões para o aumento das emissões é o crescimento econômico baseado na queima de fontes de energia fóssil, como o carvão e o petróleo, atividade que estima-se que deve crescer nas próximas décadas.

Por isso, a pesquisa indica que as emissões de dióxido de carbono devem ser reduzidas de 40% a 70% até 2050 para que a meta de dois graus Celsius de aquecimento estipulada pela ONU seja atendida.

Isso significa que os governos terão que apoiar e utilizar uma série de tecnologias para retirar o CO2 da atmosfera, como a captura e armazenamento de carbono (CCS) e o plantio de mais florestas.

O relatório também sugere que, para limitar o aquecimento global de forma significativa, serão necessários investimentos da ordem de US$ 147 bilhões por ano até 2029 em fontes de energia alternativa, como eólica, solar e nuclear.

Ao mesmo tempo, investimentos em energias fósseis teriam que cair em US$ 30 bilhões por ano, enquanto bilhões de dólares anuais teriam que ser gastos na melhoria da eficiência energética em setores importantes como transporte, construção e indústria.

O documento, contudo, afirma que o caminho para mitigar as mudanças climáticas não será nada fácil, visto que vai em direção contrária do que está acontecendo atualmente. De acordo com o estudo, as emissões globais subiram, em média, 2,2% ao ano entre 2000 e 2010, quase o dobro em relação ao ritmo do período de 1970 a 2000, que era de 1,3% ao ano.

“A crise econômica global em 2007-2008 reduziu as emissões temporariamente, mas não mudou a tendência”, diz o relatório.

Além disso, o combate ao aquecimento global custaria 4% da produção econômica mundial, e exigiria uma diminuição gradativa no consumo de bens e serviços: entre 1% e 4% até 2030, entre 2% e 6% até 2050 e entre 2% e 12% até 2100.

“Sem esforços explícitos para reduzir as emissões de gases do efeito estufa, os fatores fundamentais do crescimento das emissões devem persistir”, afirma o estudo.

Outro problema que a pesquisa aponta é que as emissões de países desenvolvidos estão sendo transferidas para nações emergentes, ou seja, a suposta redução de emissões de alguns países ricos é na verdade menor do que se imagina.

Desde 2000, as emissões de carbono para China e outras economias emergentes mais do que dobrou para quase 14 gigatoneladas por ano, mas destas, cerca de duas gigatoneladas foram da produção de bens para a exportação.

“Uma parcela crescente das emissões de CO2 da queima de combustíveis fósseis em países em desenvolvimento é liberada da produção de bens e serviços exportados, principalmente de países de renda média-alta para países de renda alta”, colocou o documento.

Esse estudo é o terceiro documento da quinta avaliação do IPCC sobre o que se sabe sobre as causas, efeitos e futuro das mudanças climáticas.

Em setembro de 2013, o painel divulgou a primeira parte da avaliação, que confirma com 95% de certeza a influência humana sobre o aquecimento global.

O segundo relatório, sobre os impactos das mudanças climáticas, será concluído e divulgado em março, no Japão. Este terceiro será finalizado e divulgado em abril, na Alemanha. Um documento final, sintetizando as três partes, deve ser lançado em outubro deste ano.

Os cientistas do painel concordaram em comentar o estudo assim que ele estiver finalizado. “É um trabalho em progresso, e estamos ansiosos para discuti-lo quando ele for finalizado, em abril”, observou Jonathan Lynn, porta-voz do IPCC, em uma entrevista por telefone à Bloomberg.

* Publicado originalmente no site CarbonoBrasil.

Climate Change Research Is Globally Skewed (Science Daily)

Jan. 22, 2014 — The supply of climate change knowledge is biased towards richer countries — those that pollute the most and are least vulnerable to climate change — and skewed away from the poorer, fragile and more vulnerable regions of the world. That creates a global imbalance between the countries in need of knowledge and those that build it. This could have implications for the quality of the political decisions countries and regions make to prevent and adapt to climate change, warn the researchers behind the study from the University of Copenhagen.

Climate change research, shown here by number of publications, primarily concerns countries that are less vulnerable to climate change and have a higher emission of CO2. The countries are also politically stable, less corrupt, and have a higher investment in education and research. (Credit: Image courtesy of University of Copenhagen)

“80 % of all the climate articles we examined were published by researchers from developed countries, although these countries only account for 18 % of the world’s population. That is of concern because the need for climate research is vital in developing countries. It could have political and societal consequences if there are regional shortages of climate scientists and research to support and provide contextually relevant advice for policy makers in developing countries,” says Professor Niels Strange from the Center for Macroecology, Evolution and Climate, University of Copenhagen, which is supported by the Danish National Research Foundation.

Climate change research, shown here by number of publications, primarily concerns countries that are less vulnerable to climate change and have a higher emission of CO2. The countries are also politically stable, less corrupt, and have a higher investment in education and research.

Together with PhD student Maya Pasgaard from the Department of Food and Resource Economics at the University of Copenhagen, Niels Strange analysed over 15,000 scientific papers on climate research from 197 countries. The analysis clearly shows that the research is biased towards countries that are wealthier, better educated, more stable and less corrupt, emit the most carbon, and are less vulnerable to climate change.

As an example, the study shows that almost 30 % of the total number of publications concerns the United States of America, Canada and China, while India is the only highly vulnerable country in the top 10 list. However, Greenland and small island states like the Seychelles and the Maldives that are generally considered vulnerable, also find their way into the top 10 list if it is calculated per capita.

The content of climate studies is also skewed

The study shows that not only the authorship, but also the choice of topic in climate research, is geographically skewed:

Articles from Europe and North America are more often biased towards issues of climate change mitigation, such as emission reductions, compared with articles from the southern hemisphere. In contrast, climate research from Africa and South and Latin America deals more with issues of climate change adaptation and impacts such as droughts and diseases compared to Europe.

“The tendency is a geographical bias where climate knowledge is produced mainly in the northern hemisphere, while the most vulnerable countries are found in the southern hemisphere. The challenge for the scientific community is to improve cooperation and knowledge sharing across geographical and cultural barriers, but also between practitioners and academics. Ultimately, it will require financial support and political will, if we as a society are to address this imbalance in the fight against climate change,” says Maya Pasgaard. The study was recently published online in the journal Global Environmental Change.

Journal Reference:

  1. M. Pasgaard, N. Strange. A quantitative analysis of the causes of the global climate change research distributionGlobal Environmental Change, 2013; 23 (6): 1684 DOI: 10.1016/j.gloenvcha.2013.08.013

Scientists: Americans are becoming weather wimps (AP)

By SETH BORENSTEIN

— Jan. 9, 2014 5:33 PM EST

Deep Freeze Weather Wimps

FILE – In this Sunday, Jan. 5, 2014, file photo, a person struggles to cross a street in blowing and falling snow as the Gateway Arch appears in the distance, in St. Louis. The deep freeze that gripped much of the nation this week wasn’t unprecedented, but with global warming we’re getting far fewer bitter cold spells, and many of us have forgotten how frigid winter used to be. (AP Photo/Jeff Roberson, File)

WASHINGTON (AP) — We’ve become weather wimps.

As the world warms, the United States is getting fewer bitter cold spells like the one that gripped much of the nation this week. So when a deep freeze strikes, scientists say, it seems more unprecedented than it really is. An Associated Press analysis of the daily national winter temperature shows that cold extremes have happened about once every four years since 1900.

Until recently.

When computer models estimated that the national average daily temperature for the Lower 48 states dropped to 17.9 degrees on Monday, it was the first deep freeze of that magnitude in 17 years, according to Greg Carbin, warning meteorologist for the National Oceanic and Atmospheric Administration.

That stretch — from Jan. 13, 1997 to Monday — is by far the longest the U.S. has gone without the national average plunging below 18 degrees, according to a database of daytime winter temperatures starting in January 1900.

In the past 115 years, there have been 58 days when the national average temperature dropped below 18. Carbin said those occurrences often happen in periods that last several days so it makes more sense to talk about cold outbreaks instead of cold days. There have been 27 distinct cold snaps.

Between 1970 and 1989, a dozen such events occurred, but there were only two in the 1990s and then none until Monday.

“These types of events have actually become more infrequent than they were in the past,” said Carbin, who works at the Storm Prediction Center in Norman, Okla. “This is why there was such a big buzz because people have such short memories.”

Said Jeff Masters, meteorology director of the private firm Weather Underground: “It’s become a lot harder to get these extreme (cold) outbreaks in a planet that’s warming.”

And Monday’s breathtaking chill? It was merely the 55th coldest day — averaged for the continental United States — since 1900.

The coldest day for the Lower 48 since 1900 — as calculated by the computer models — was 12 degrees on Christmas Eve 1983, nearly 6 degrees chillier than Monday.

The average daytime winter temperature is about 33 degrees, according to Carbin’s database.

There have been far more unusually warm winter days in the U.S. than unusually cold ones.

Since Jan. 1, 2000, only two days have ranked in the top 100 coldest: Monday and Tuesday. But there have been 13 in the top 100 warmest winter days, including the warmest since 1900: Dec. 3, 2012. And that pattern is exactly what climate scientists have been saying for years, that the world will get more warm extremes and fewer cold extremes.

Nine of 11 outside climate scientists and meteorologists who reviewed the data for the AP said it showed that as the world warms from heat-trapping gas spewed by the burning of fossil fuels, winters are becoming milder. The world is getting more warm extremes and fewer cold extremes, they said.

“We expect to see a lengthening of time between cold air outbreaks due to a warming climate, but 17 years between outbreaks is probably partially due to an unusual amount of natural variability,” or luck, Masters said in an email. “I expect we’ll go far fewer than 17 years before seeing the next cold air outbreak of this intensity.

And the scientists dismiss global warming skeptics who claim one or two cold days somehow disproves climate change.

“When your hands are freezing off trying to scrape the ice off your car, it can be all too tempting to say, ‘Where’s global warming now? I could use a little of that!’ But you know what? It’s not as cold as it used to be anymore,” Texas Tech University climate scientist Katharine Hayhoe said in an email.

The recent cold spell, which was triggered by a frigid air mass known as the polar vortex that wandered way south of normal, could also be related to a relatively new theory that may prove a weather wild card, said Rutgers University climate scientist Jennifer Francis. Her theory, which has divided mainstream climate scientists, says that melting Arctic sea ice is changing polar weather, moving the jet stream and causing “more weirdness.”

Ryan Maue, a meteorologist with the private firm Weather Bell Analytics who is skeptical about blaming global warming for weather extremes, dismisses Francis’ theory and said he has concerns about the accuracy of Carbin’s database. Maue has his own daily U.S. average temperature showing that Monday was colder than Carbin’s calculations.

Still, he acknowledged that cold nationwide temperatures “occurred with more regularity in the past.”

Many climate scientists say Americans are weather weenies who forgot what a truly cold winter is like.

“I think that people’s memory about climate is really terrible,” Texas A&M University climate scientist Andrew Dessler wrote in an email. “So I think this cold event feels more extreme than it actually is because we’re just not used to really cold winters anymore.”

Animal Cells Can Communicate by Reaching Out, Touching, Study Shows (Science Daily)

Jan. 2, 2014 — In a finding that directly contradicts the standard biological model of animal cell communication, UCSF scientists have discovered that typical cells in animals have the ability to transmit and receive biological signals by making physical contact with each other, even at long distance.

Stock photo. A major reason that animal cell cytonemes had not been observed or studied previously is because these structures are too fragile to survive traditional laboratory methods of preparing cells for imaging. “During the last decade or so, though, there have been fantastic technical advances, including new techniques in genetic engineering, new microscopes that improve the resolution and sensitivity for imaging living cells and the development of fluorescent marker proteins that we can attach to proteins of interest,” the lead researcher explains. (Credit: © Kurhan / Fotolia)

The mechanism is similar to the way neurons communicate with other cells, and contrasts the standard understanding that non-neuronal cells “basically spit out signaling proteins into extracellular fluid and hope they find the right target,” said senior investigator Thomas B. Kornberg, PhD, a professor of biochemistry with the UCSF Cardiovascular Research Institute.

The paper was published on January 2, 2014 in Science.

Working with living tissue from Drosophila — fruit flies — Kornberg and his team demonstrated that cells send out long, thin tubes of cytoplasm called cytonemes, which Kornberg said “can extend across the length of 50 or 100 cells” before touching the cells they are targeting. The point of contact between a cytoneme and its target cell acts as a communications bridge between the two cells.

“It’s long been known that neurons communicate in a similar way — by transferring signals at points of contact called synapses, and transmitting the response over long distances in long tubes called axons,” said Kornberg. “However, it’s always been thought that this mode of signaling was unique to neurons. We have now shown that many types of animal cells have the same ability to reach out and synapse with one another in order to communicate, using signaling proteins as units of information instead of the neurotransmitters and electrical impulses that neurons use.”

In fact, said Kornberg, “I would argue that the only strong experimental data that exists today for a mechanism by which these signaling proteins move from one cell to another is at these points of contact and via cytonemes.”

However, he noted, “There are 100 years worth of work and thousands of scientific papers in which it has been simply assumed that these proteins move from one cell to another by moving through extracellular fluid. So this is a fundamentally different way of considering how signaling goes on in tissues.”

Working with cells in the Drosophila wing that produce and send the signaling protein Decapentaplegic (Dpp), Kornberg and his team showed that Dpp transfers between cells at the sites where cytonemes form a connection, and that cytonemes are the conduits that move Dpp from cell to cell.

The scientists discovered that the sites of contact have characteristics of synapses formed by neurons. They demonstrated that in flies that had been genetically engineered to lack synapse-making proteins, cells are unable to form synapses or signal successfully.

“In the mutants, the signals that are normally taken up by target cells are not taken up, and signaling is prevented,” said Kornberg. “This demonstrates that physical contact is required for signal transfer, signal uptake and signaling.”

Kornberg said that a major reason that animal cell cytonemes had not been observed or studied previously is because these structures are too fragile to survive traditional laboratory methods of preparing cells for imaging. “During the last decade or so, though, there have been fantastic technical advances, including new techniques in genetic engineering, new microscopes that improve the resolution and sensitivity for imaging living cells and the development of fluorescent marker proteins that we can attach to proteins of interest.”

Using these new technologies, Kornberg and his team have captured vivid images, and even movies, of fluorescent signaling proteins moving through fluorescently marked cytonemes.

“We are not saying that cells always use cytonemes for signaling,” Kornberg cautioned. “Hormones, for example, are another method of long distance cell signaling. A cell that takes up insulin does not care where that insulin came from — a pancreas or an intravenous injection. But there are signals of a specialized type, such as those that pass between stem cells and the cells around them, or signals that determine tissue growth, patterning and function, where the identity of the communicating cells must be precisely defined. It’s important that these signals are received in the context of the cells that are making them.”

Kornberg noted that other research teams have made observations that suggest that cytoneme-based signaling may also occur “between stem cells and the cells that instruct them on what they are going to do and where they are going to go.” Cancer cells may also use this method to communicate with their neighbors, he said.

The discovery of animal cell cytonemes and the critical role they play in long distance signaling “opens up a wonderful biology of which we have very little understanding at this point,” said Kornberg. “For example, how do these cytonemes find their targets? How do they know when they have found them? These are some of the questions that we are pursuing.”

Journal Reference:

  1. S. Roy, H. Huang, S. Liu, T. B. Kornberg. Cytoneme-Mediated Contact-Dependent Transport of the Drosophila Decapentaplegic Signaling ProteinScience, 2014; DOI: 10.1126/science.1244624

Solar Activity Not a Key Cause of Climate Change, Study Shows (Science Daily)

Dec. 22, 2013 — Climate change has not been strongly influenced by variations in heat from the sun, a new scientific study shows.

Solar flare on the sun. Climate change has not been strongly influenced by variations in heat from the sun, a new scientific study shows. (Credit: NASA/SDO/AIA)

The findings overturn a widely held scientific view that lengthy periods of warm and cold weather in the past might have been caused by periodic fluctuations in solar activity.

Research examining the causes of climate change in the northern hemisphere over the past 1000 years has shown that until the year 1800, the key driver of periodic changes in climate was volcanic eruptions. These tend to prevent sunlight reaching Earth, causing cool, drier weather. Since 1900, greenhouse gases have been the primary cause of climate change.

The findings show that periods of low sun activity should not be expected to have a large impact on temperatures on Earth, and are expected to improve scientists’ understanding and help climate forecasting.

Scientists at the University of Edinburgh carried out the study using records of past temperatures constructed with data from tree rings and other historical sources. They compared this data record with computer-based models of past climate, featuring both significant and minor changes in the sun.

They found that their model of weak changes in the sun gave the best correlation with temperature records, indicating that solar activity has had a minimal impact on temperature in the past millennium.

The study, published in Nature GeoScience, was supported by the Natural Environment Research Council.

Dr Andrew Schurer, of the University of Edinburgh’s School of GeoSciences, said: “Until now, the influence of the sun on past climate has been poorly understood. We hope that our new discoveries will help improve our understanding of how temperatures have changed over the past few centuries, and improve predictions for how they might develop in future. Links between the sun and anomalously cold winters in the UK are still being explored.”

Journal Reference:

  1. Andrew P. Schurer, Simon F. B. Tett, Gabriele C. Hegerl.Small influence of solar variability on climate over the past millenniumNature Geoscience, 2013; DOI:10.1038/ngeo2040

Guaranis desmentem livros e revelam nova história (A Nova Democracia)

Ano VI, nº 40, fevereiro de 2008

Rosana Bond

Os guaranis, que por muito tempo observaram o passado de seu povo ser escrito e deturpado pela ideologia das classes dominantes, decidiram dar um basta e tomar nas mãos a tarefa de desmentir os livros e contar sua própria História.

http://anovademocracia.com.br/40/22b.jpg

— Chegou a hora de a sociedade não-indígena do Brasil conhecer a verdade, ninguém pode continuar pensando que perdemos a memória — afirma Werá Tupã (Leonardo), da aldeia do Morro dos Cavalos, SC, tido como um dos mais destacados intelectuais indígenas do sul do país.Ele faz parte de um grupo de guaranis que vem pesquisando fatos históricos e episódios lendários com o objetivo de reapresentá-los ao povo brasileiro de um modo diferente daquele com que foi narrado pelo pensamento reacionário. Um dos temas, cujo estudo demorou anos e ainda não está totalmente concluído, é a verdadeira história de Sepé Tiarajú.

Sepé foi um dos maiores guerreiros indígenas do sul do país, líder da resistência dos Sete Povos das Missões (RS) contra tropas espanholas e portuguesas, na chamada Guerra Guaranítica, de 1753 a 1756. Essa guerra foi abordada (de maneira fantasiosa e truncada) no filme A Missão, com Robert de Niro e Jeremy Irons, em 1986. Tal rebelião foi consequência do Tratado de Madri, pelo qual Portugal e Espanha trocaram entre si os Sete Povos das Missões, sob domínio espanhol, pela Colônia do Sacramento, sob domínio lusitano. O acordo obrigava os 30 mil guaranis e os jesuítas das sete reduções a abandonarem o Rio Grande do Sul e passarem ao território castelhano, no outro lado do rio Uruguai.

A Companhia de Jesus, chefia jesuíta na Europa, ordenou a mudança, mas os guaranis não aceitaram. Sepé liderou a resistência e em carta à Coroa de Espanha deu o famoso aviso: “Esta terra tem dono!”.

ARMAS DE CANA BRAVA

Sepé articulou uma espécie de Confederação Guaranítica, criando inovadoras táticas militares para a época, nas quais priorizava a guerrilha e evitava grandes batalhas. Chegou a idealizar e construir quatro peças de artilharia, confeccionadas com cana brava. Foi assassinado numa emboscada, por soldados espanhóis e portugueses, nos campos de Caiboaté, às margens da Sanga da Bica, em 7 de fevereiro de 1756.

O bravo e exemplar Sepé Tiarajú transformou-se num símbolo para os gaúchos. Há um rio e um município com seu nome e, em Santo Ângelo, uma estátua no centro da cidade. Os guaranis não vêem problema nisso, mas há uma questão de fundo que parece lhes desgostar e incomodar há muito tempo. Que é a “desindianização” de Sepé.
A História escrita pela cartilha das classes exploradoras e da igreja católica apossou-se da figura heróica, metamorfoseando-a quase num branco que era índio por acaso.

Os livros falam que ele “abraçou a doutrina cristã” e foi “o mais ardoroso defensor da obra dos jesuítas”; que “seus mestres foram os padres”; que ele lutou “sugestionado pelos religiosos”; que “era índio missioneiro, provavelmente já cristão de terceira geração”; que alguns padres foram “os principais estrategistas da resistência”; que, órfão de pai e mãe, “foi criado pelos jesuítas”; Werá Tupã discorda de tudo isso. Os livros erram até numa informação básica, sobre sua origem. Numa revelação inédita e surpreendente, Werá diz que Sepé não era guarani. E sim pertencia a “um outro povo indígena que não conseguimos identificar. Ele foi adotado pelos guaranis e criado como um dos nossos”.

A pesquisa a respeito de Sepé baseou-se na história oral, preservada na memória de índios centenários que viveram no Rio Grande do Sul, entre eles a velha xamã Tatãty Yva Rete (Maria Candelária Garay), apontada por antropólogos da Universidade Federal de Santa Catarina (UF SC) e PUC de São Paulo como uma das lideranças femininas mais importantes e respeitadas da tribo. Nascida aproximadamente em 1874, Tatãty foi avó adotiva de Werá Tupã.

A verdadeira história de Sepé Tiarajú

[ele] não era um cristão mesmo, como dizem, porque na verdade ele respeitava mais a religião do avô, a religião do nosso povo. Karaí Djekupé foi e continua sendo um grande herói dos guaranis

O AND foi escolhido pelos guaranis para ser o primeiro órgão de comunicação dos djuruá (não-índios) a tomar conhecimento do conteúdo do estudo, que poderá se transformar em breve num livro. Eis um resumo, contado por Werá Tupã:

“Ao contrário do que se diz, Sepé não era guarani. Ele nasceu em outro povo indígena, que não conseguimos identificar. Quando ele tinha dois anos de idade, sua aldeia, que ficava no Rio Grande do Sul, foi atacada por portugueses ou espanhóis. Os guaranis correram para ajudar, mas o lugar já tinha sido invadido e quase todos tinham sido massacrados.

Os guaranis salvaram o menino e o levaram para uma aldeia nossa, perto da missão de São Miguel. Um casal adotou ele. O avô da família era um pajé muito poderoso e o menino adorava ele. Uma coisa que quase ninguém sabe é que o nome certo dele não era Sepé Tiarajú. Esse era o jeito que os padres das missões entenderam e escreveram.

Seu nome era Djekupé A Djú, que significava “Guardião de Cabelo Amarelo”. “Guardião” porque era um guerreiro e “cabelo amarelo” porque não tinha o cabelo bem preto como os guaranis, era meio castanho. Mas era índio mesmo, não mestiço.

Quando o menino começou a crescer, pensaram que ia ser um pajé, um religioso, e ele começou a ser preparado para isso. Mas seu outro lado, de guerreiro, foi mais forte e aí mudou o seu destino. Recebeu nome de guerreiro, Djekupé A Djú. E também era chamado pelos guaranis de Karaí Djekupé, “Senhor Guardião”.

O destino de guerreiro foi porque ele era revoltado com os brancos e tinha gratidão pelos guaranis. Queria lutar pelos guaranis. É que, na aldeia, nunca esconderam dele a sua história, tudo que tinha acontecido no ataque.

Os jesuítas não criaram ele, mas ia sempre nas missões porque os padres davam apoio na defesa e ele ficava uns tempos lá. Foi assim que aprendeu a língua espanhola.

Os padres não treinaram ele, foi preparado sim pelo grande exército guarani, os “kereymba” [pronuncia-se “krimbá”]. Era um ótimo guerreiro.

Além do mais, tinha facilidade para conversar com os homens brancos, uma coisa que os outros guerreiros não tinham aptidão para fazer. Djekupé A Djú lutava, fazia de tudo para que as aldeias guaranis não fossem perturbadas. Principalmente porque ele pensava no seu avô, não queria que nada atrapalhasse a preparação espiritual do seu avô [Werá não entrou em detalhes, mas é possível supor que, de acordo com a tradição, o velho pajé se preparava espiritualmente para “viajar” à Terra Sem Mal, a Yvy Mara Ey, uma espécie de paraíso, que segundo o mito pode ser alcançado em vida ou após a morte].

Por aí se vê que Djekupé A Djú podia se relacionar com os jesuítas, mas não era um cristão mesmo, como dizem, porque na verdade ele respeitava mais a religião do avô, a religião do nosso povo. Karaí Djekupé foi e continua sendo um grande herói dos guaranis e esta é a sua verdadeira história”.

Estudos históricos e antropológicos vêm indicando, cada vez mais, que a falada conversão dos guaranis ao cristianismo, nas reduções jesuíticas, foi talvez mais aparente que real. Esses indígenas não se recusavam ao batismo e às missas, muitas vezes por apreciarem a estética dos rituais e para não desgostarem os padres.

Um sinal disso pode ser a não permanência da religião. O número de guaranis católicos, hoje, é ínfimo. Tem havido “ataques” de seitas protestantes às aldeias e muitos frequentam os cultos. Mas ainda não se pode avaliar a verdadeira dimensão do prejuízo cultural, pois os guaranis parecem possuir uma auto-defesa eficiente, baseada no ato de “desviar-se”, com extrema diplomacia, que ilude inteligentemente os desavisados.

Geoengineering Approaches to Reduce Climate Change Unlikely to Succeed (Science Daily)

Dec. 5, 2013 — Reducing the amount of sunlight reaching the planet’s surface by geoengineering may not undo climate change after all. Two German researchers used a simple energy balance analysis to explain how Earth’s water cycle responds differently to heating by sunlight than it does to warming due to a stronger atmospheric greenhouse effect. Further, they show that this difference implies that reflecting sunlight to reduce temperatures may have unwanted effects on Earth’s rainfall patterns.

Heavy rainfall events can be more common in a warmer world. (Credit: Annett Junginger, distributed via imaggeo.egu.eu)

The results are now published in Earth System Dynamics, an open access journal of the European Geosciences Union (EGU).

Global warming alters Earth’s water cycle since more water evaporates to the air as temperatures increase. Increased evaporation can dry out some regions while, at the same time, result in more rain falling in other areas due to the excess moisture in the atmosphere. The more water evaporates per degree of warming, the stronger the influence of increasing temperature on the water cycle. But the new study shows the water cycle does not react the same way to different types of warming.

Axel Kleidon and Maik Renner of the Max Planck Institute for Biogeochemistry in Jena, Germany, used a simple energy balance model to determine how sensitive the water cycle is to an increase in surface temperature due to a stronger greenhouse effect and to an increase in solar radiation. They predicted the response of the water cycle for the two cases and found that, in the former, evaporation increases by 2% per degree of warming while in the latter this number reaches 3%. This prediction confirmed results of much more complex climate models.

“These different responses to surface heating are easy to explain,” says Kleidon, who uses a pot on the kitchen stove as an analogy. “The temperature in the pot is increased by putting on a lid or by turning up the heat — but these two cases differ by how much energy flows through the pot,” he says. A stronger greenhouse effect puts a thicker ‘lid’ over Earth’s surface but, if there is no additional sunlight (if we don’t turn up the heat on the stove), extra evaporation takes place solely due to the increase in temperature. Turning up the heat by increasing solar radiation, on the other hand, enhances the energy flow through Earth’s surface because of the need to balance the greater energy input with stronger cooling fluxes from the surface. As a result, there is more evaporation and a stronger effect on the water cycle.

In the new Earth System Dynamics study the authors also show how these findings can have profound consequences for geoengineering. Many geoengineering approaches aim to reduce global warming by reducing the amount of sunlight reaching Earth’s surface (or, in the pot analogy, reduce the heat from the stove). But when Kleidon and Renner applied their results to such a geoengineering scenario, they found out that simultaneous changes in the water cycle and the atmosphere cannot be compensated for at the same time. Therefore, reflecting sunlight by geoengineering is unlikely to restore the planet’s original climate.

“It’s like putting a lid on the pot and turning down the heat at the same time,” explains Kleidon. “While in the kitchen you can reduce your energy bill by doing so, in the Earth system this slows down the water cycle with wide-ranging potential consequences,” he says.

Kleidon and Renner’s insight comes from looking at the processes that heat and cool Earth’s surface and how they change when the surface warms. Evaporation from the surface plays a key role, but the researchers also took into account how the evaporated water is transported into the atmosphere. They combined simple energy balance considerations with a physical assumption for the way water vapour is transported, and separated the contributions of surface heating from solar radiation and from increased greenhouse gases in the atmosphere to obtain the two sensitivities. One of the referees for the paper commented: “it is a stunning result that such a simple analysis yields the same results as the climate models.”

Journal Reference:

  1. A. Kleidon, M. Renner. A simple explanation for the sensitivity of the hydrologic cycle to global climate changeEarth System Dynamics Discussions, 2013; 4 (2): 853 DOI: 10.5194/esdd-4-853-2013

“Scientists are…” (Slate)

DEC. 4 2013 8:00 AM

By 

Phil Plait writes Slate’s Bad Astronomy blog and is an astronomer, public speaker, science evangelizer, and author of Death from the Skies!

A lot of tech is so ubiquitous you don’t even notice it anymore; it would be like a fish noticing the water in which it swims.

Google certainly fits that category; it’s not very often a company name becomes a verb. It’s second nature now to fire up a browser and type in a few words when I need some help pinning down a word or phrase, or to just get more info on a topic.

A while back, Google introducedautocomplete; if you start typing words into the search engine text field, it’ll make suggestions for words even before you’re done typing. I don’t find this feature particularly useful since I generally have a pretty good idea what I’m looking for when I’m searching. But I can certainly see its utility.

The suggestions are based on previous searches by users as well as page content, so the most common things people type in (weighted with with highly-ranked sites) are what Google offers up as helpful phrases. That makes sense; using the most common searches is statistically likely to match what you might need.

It’s not hard to imagine a downside to this, though. It can focus searching to a few popular sites, and can reinforce false information, since those pages may not be vetted for accuracy.

I was alerted to this when Lindacska126 on Twitter sent me the following tweet:

@BadAstronomer Have you seen what happens when you Google “Scientists are”?pic.twitter.com/xWf7hoKd4W

The link goes to a screengrab showing Google’s suggestions to her. I typed “Scientists are” into Google and got essentially the same results:

Scientists are...
Scientists are what now?

Ouch. That doesn’t seem to fare well for what people think of scientists.

I’ll admit, most scientists are liberal, or perhaps better described as progressive. In general that’s to be expected of someone who has an open mind, is ready for open inquiry, and willing to change their views based on evidence. But only in general; I know many conservative scientists who are quite brilliant. I’ve been labeled as liberal myself many times, which makes me chuckle; my views on most topics are a bit more subtle than can be assumed from such a blanket label.

But the “scientists are stupid” and “scientists are liars” suggestions are troubling. Can it be that most people really think this?

I decided to follow through, and see what pages are actually recommended by Google if you use these suggestions. What I found is that yes, many of the pages linked do make these accusations — and they come from the usual suspects, such as fundamentalist religion sites, or climate change deniers. No surprise there. And some are satirical pages, clearly meant as parody. But it’s not hard to find page after page, site after site, sincerely making these claims about scientists.

What do we make of this? Is all hope lost?

This is troubling, to be sure, but I don’t know just how bad it is. After all, we don’t know why people are using these terms. I search for things I know are wrong all the time, for instance, so I type weird things into Google every day. Of course, I tend to be looking for people making claims that are, um, not as reality-based as they could be, so maybe I’m not the best example.

I can think of a few other ways this may not be so bad, but I keep coming back to the fact that in the United States, roughly 45% of people outright deny evolution. Climate change denial is on the wane, but still, something like a third of people in the US deny that humans have played a role in it. And it’s not hard at all to find media pundits who froth and rail against science, as long as it doesn’t have the ideological stance they cleave unto.

Scientists need a better rep. Science is everywhere, all around you, all the time. You’re soaking in it. I can make all manners of arguments of why it’s important philosophically — and I have — but it’s also absolutely critical economically; our way of life in the United States, and the world, depends absolutely on scientific achievements. From better agriculture to medicine to communication to mitigating global disasters, science plays a fundamental role in each.

So what to do? In my opinion, there are two things that will help. One is to not let broad and ridiculous accusations about science and scientists go unchecked. I do that here quite often, of course.

The other, though, is if you love science, tell people. Write about it, talk about it, sing about it if you can (and Gawker? You’re not helping; we should be encouragingpeople to look up the definition of “science”, not making fun of them).

And if I may, let me suggest simply being a better person. I get this idea from my friend George Hrab, who has a segment on his podcast where he answers questions from listeners. Many times, he is asked by someone who is nonreligious how their reputation can be improved. George tells them to lead by example: be friendly, help out, do charity work. Then, later, if someone finds out you’re not a believer, it won’t color their opinion as much. In fact, it may change their mind about an entire group of people they otherwise would have written off.

I suspect the same can be done for science. If so many people truly think scientists are liars, scientists are stupid, then we need to show them otherwise. Don’t lecture; teach (or better yet, converse). Don’t insult or belittle; enlighten. Admit your mistakes, show where you learn from them. Talk about the joy and wonder and awe of truly understanding the Universe as it actually is!

Isn’t that why we love science in the first place?

My hope is that we can change Google’s algorithm, so that one day it will produce this:

scientists-are-good
Ah. That’s better.

 

Lawsuits Could Turn Chimpanzees Into Legal Persons (Science)

2 December 2013 1:00 pm

Property or person? A series of lawsuits could free U.S. chimpanzees from captivity.

© Martin Harvey/Corbis. Property or person? A series of lawsuits could free U.S. chimpanzees from captivity.

This morning, an animal rights group known as the Nonhuman Rights Project (NhRP) filed a lawsuit in a New York Supreme Court in an attempt to get a judge to declare that chimpanzees are legal persons and should be freed from captivity. The suit is the first of three to be filed in three New York counties this week. They target two research chimps at Stony Brook University and two chimps on private property, and are the opening salvo in a coordinated effort to grant “legal personhood” to a variety of animals across the United States.

If NhRP is successful in New York, it could be a significant step toward upending millennia of law defining animals as property and could set off a “chain reaction” that could bleed over to other jurisdictions, says Richard Cupp, a law professor at Pepperdine University in Malibu, California, and a proponent of focusing on animal welfare rather than animal rights. “But if they lose it could be a significant step backward for the movement. They’re playing with fire.”

The litigation has been in the works since 2007, when animal rights attorney Steven Wise founded NhRP, an association of about 60 lawyers, scientists, and policy experts. The group argues that cognitively advanced animals like chimpanzees and dolphins are so self-aware that keeping them in captivity—whether a zoo or research laboratory—is tantamount to slavery. “It’s a terrible torture we inflict on them, and it has to stop,” Wise says. “And all of human law says the way things stop is when courts and legislatures recognize that the being imprisoned is a legal person.”

NhRP spent 5 years researching the best legal strategy—and best jurisdiction—for its first cases. The upshot: a total of three lawsuits to be filed in three New York trial courts this week on behalf of four resident chimpanzees. One, named Tommy, lives in Gloversville in a “used trailer lot … isolated in a cage in a dark shed,” according to an NhRP press release. Another, Kiko, resides in a cage on private property in Niagara Falls, the group says. The final two, Hercules and Leo, are research chimps at Stony Brook University. Wise says that 11 scientists have filed affidavits in support of the group’s claims; most of them, including Jane Goodall, have worked with nonhuman primates.

In each case, NhRP is petitioning judges with a writ of habeas corpus, which allows a person being held captive to have a say in court. In a famous 1772 case, an English judge allowed such a writ for a black slave named James Somerset, tacitly acknowledging that he was a person—not a piece of property—and subsequently freed him. The case helped spark the eventual abolition of slavery in England and the United States. Wise is hoping for something similar for the captive chimps. If his group wins any of the current cases, it will ask that the animals be transferred to a chimpanzee sanctuary in Florida. Any loss, he says, will immediately be appealed.

Regardless of what happens, NhRP is already preparing litigation for other states, and not all of it involves chimpanzees. “Gorillas, orangutans, elephants, whales, dolphins—any animal that has these sorts of cognitive capabilities, we would be comfortable bringing suit on behalf of,” Wise says. Some would be research animals; others would be creatures that simply live in confined spaces, such as zoos and aquariums. “No matter how these first cases turn out, we’re going to move onto other cases, other states, other species of animals,” he says. “We’re going to file as many lawsuits as we can over the next 10 or 20 years.”

Frankie Trull, the president of the National Association for Biomedical Research in Washington, D.C., says her organization will fight any attempts at personhood in the courts. Chimpanzees, she notes, are important models for behavioral research, as well as for developing vaccines against viruses like hepatitis C. “Assigning rights to animals akin to what humans have would be chaotic for the research community.”

Anatomist Susan Larson, who studies the Stony Brook chimpanzees to shed light on the origin of bipedalism in humans, says she is “very shocked and upset” by the lawsuit. She says the chimps live in an indoor enclosure comprised of three rooms—“about the size of an average bedroom”—plus another room where they can climb, hang, and jump from ladders and tree trunks. “Everything I do with these animals I’ve done on myself,” she says. “I understand that animal rights activists don’t want these animals mistreated, but they’re hampering our ability to study them before they become extinct.”

The more immediate threat to Larson’s research isn’t NhRP, however—it is the National Institutes of Health (NIH). In June, NIH announced plans to retire all but 50 of its 360 research chimpanzees and phase out much of the chimp research it supports. The U.S. Fish and Wildlife Service, meanwhile, has recommended that captive chimps be listed as endangered, which would limit any research that isn’t in their best interest. “Soon, the type of work I do will no longer be possible,” Larson says. “They have effectively ended my research program.”

Stephen Ross, the director of the Lester E. Fisher Center for the Study and Conservation of Apes at the Lincoln Park Zoo in Chicago, Illinois, wonders if there’s a compromise. Ross, who has studied chimpanzees for more than 20 years and played a role in crafting NIH’s new policy, advocates ending private ownership of chimps and invasive research. All other chimpanzees, he says, whether located at zoos or universities, should live in large enclosures, with access to the outside, and in group sizes of at least seven individuals. “You don’t need personhood to do that,” he says. “I think we share a common philosophy,” he says of NhRP. “We want to make things better for chimps. We just disagree on how to get there.”

 

A more detailed version of this story will appear in the 6 December issue of Science.

*Clarification, 2 December, 4 p.m.: This item has been updated to reflect Richard Cupp’s position on animal rights.

No Qualms About Quantum Theory (Science Daily)

Nov. 26, 2013 — A colloquium paper published inThe European Physical Journal D looks into the alleged issues associated with quantum theory. Berthold-Georg Englert from the National University of Singapore reviews a selection of the potential problems of the theory. In particular, he discusses cases when mathematical tools are confused with the actual observed sub-atomic scale phenomena they are describing. Such tools are essential to provide an interpretation of the observations, but cannot be confused with the actual object of studies.

The author sets out to demystify a selected set of objections targeted against quantum theory in the literature. He takes the example of Schrödinger’s infamous cat, whose vital state serves as the indicator of the occurrence of radioactive decay, whereby the decay triggers a hammer mechanism designed to release a lethal substance. The term ‘Schrödinger’s cat state’ is routinely applied to superposition of so-called quantum states of a particle. However, this imagined superposition of a dead and live cat has no reality. Indeed, it confuses a physical object with its description. Something as abstract as the wave function − which is a mathematical tool describing the quantum state − cannot be considered a material entity embodied by a cat, regardless of whether it is dead or alive.

Other myths debunked in this paper include the provision of proof that quantum theory is well defined, has a clear interpretation, is a local theory, is not reversible, and does not feature any instant action at a distance. It also demonstrates that there is no measurement problem, despite the fact that the measure is commonly known to disturb the system under measurement. Hence, since the establishment of quantum theory in the 1920s, its concepts are now clearer, but its foundations remain unchanged.

Journal Reference:

  1. Berthold-Georg Englert. On quantum theoryThe European Physical Journal D, 2013; 67 (11) DOI: 10.1140/epjd/e2013-40486-5

Engineering Education May Diminish Concern for Public Welfare Issues (Science Daily)

Nov. 20, 2013 — Collegiate engineering education may foster a “culture of disengagement” regarding issues of public welfare, according to new research by a sociologist at Rice University.

imagesFor the first-of-its-kind study, the researcher used survey data from four U.S. colleges to examine how students’ public-welfare beliefs change during their college engineering education and whether the curricular emphases of their engineering programs are related to students’ beliefs about public welfare. The study found that engineering students leave college less concerned about public welfare than when they entered.

Study author Erin Cech, an assistant professor of sociology who has B.S. degrees in both electrical engineering and sociology, said that many people inside and outside engineering have emphasized the importance of training ethical, socially conscious engineers, but she wonders if engineering education in the U.S. actually encourages young engineers to take seriously their professional responsibility to public welfare.

“There’s an overarching assumption that professional engineering education results in individuals who have a deeper understanding of the public welfare concerns of their profession,” Cech said. “My study found that this is not necessarily the case for the engineering students in my sample.”

Cech said that as part of their education, engineering students learn the profession’s code of ethics, which includes taking seriously the safety, health and welfare of the public. However, she said, it appears that there is something about engineering education that results in students becoming more cynical and less concerned with public policy and social engagement issues.

“The way many people think about the engineering profession as separate from social, political and emotional realms is not an accurate assessment,” Cech said. “People have emotional and social reactions to engineered products all the time, and those products shape people’s lives in deep ways; so it stands to reason that it is important for engineers to be conscious of broader ethical and social issues related to technology.”

Cech said that this “culture of disengagement” is rooted in how engineering education frames engineering problem-solving.

“Issues that are nontechnical in nature are often perceived as irrelevant to the problem-solving process,” Cech said. “There seems to be very little time or space in engineering curricula for nontechnical conversations about how particular designs may reproduce inequality — for example, debating whether to make a computer faster, more technologically savvy and expensive versus making it less sophisticated and more accessible for customers.”

Cech said ignoring these issues does a disservice to students because practicing engineers are required to address social welfare concerns on a regular basis, even if it involves a conflict of interest or whistleblowing.

“If students are not prepared to think through these issues of public welfare, then we might say they are not fully prepared to enter the engineering practice,” Cech said.

Cech became interested in this research topic as an undergraduate electrical engineering student.

“Because I went through engineering education myself, I care deeply about this topic,” she said. “I want to advance the conversation about how engineering education can be the best it can possibly be.”

The study included more than 300 students who entered engineering programs as freshmen in 2003 at four U.S. universities in the Northeast. Rice students were not included in the study. Participants were surveyed in the spring of each year and at 18 months after graduation. In the surveys, students were asked to rate the importance of professional and ethical responsibilities and their individual views on the importance of improving society, being active in their community, promoting racial understanding and helping others in need. In addition, the students were asked how important the following factors are to their engineering programs: ethical and/or social issues, policy implications of engineering, and broad education in humanities and social sciences.

“Culture of Disengagement in Engineering Education?” will appear in an upcoming issue of the journal Science, Technology and Human Values. The research was funded by the National Science Foundation.

Something Is Rotten at the New York Times (Huff Post)

By Michael E. Mann

Director of Penn State Earth System Science Center; Author of ‘Dire Predictions’ and ‘The Hockey Stick and the Climate Wars’

Posted: 11/21/2013 7:20 pm

Something is rotten at the New York Times.

When it comes to the matter of human-caused climate change, the Grey Lady’s editorial page has skewed rather contrarian of late.

A couple months ago, the Intergovernmental Panel on Climate Change (IPCC) publishedits 5th scientific assessment, providing the strongest evidence to date that climate change is real, caused by us, and a problem.

Among other areas of the science where the evidence has become ever more compelling, is the so-called “Hockey Stick” curve — a graph my co-authors and I published a decade and a half ago showing modern warming in the Northern Hemisphere to be unprecedented for at least the past 1000 years. The IPCC further strengthened that original conclusion, finding that recent warmth is likely unprecedented over an even longer timeframe.

Here was USA Today on the development:

The latest report from the Intergovernmental Panel on Climate Change, the internationally accepted authority on the subject, concludes that the climate system has warmed dramatically since the 1950s, and that scientists are 95% to 100% sure human influence has been the dominant cause. In the Northern Hemisphere, 1983 to 2012 was likely the warmest 30-year period of the past 1,400 years, the IPCC found.

And here was the Washington Post:

The infamous “hockey stick” graph showing global temperatures rising over time, first slowly and then sharply, remains valid.

And the New York Times? Well we instead got this:

The [Hockey Stick] graph shows a long, relatively unwavering line of temperatures across the last millennium (the stick), followed by a sharp, upward turn of warming over the last century (the blade). The upward turn implied that greenhouse gases had become so dominant that future temperatures would rise well above their variability and closely track carbon dioxide levels in the atmosphere….I knew that wasn’t the case.

Huh?

Rather than objectively communicating the findings of the IPCC to their readers, the New York Times instead foisted upon them the ill-informed views of Koch Brothers-fundedclimate change contrarian Richard Muller, who used the opportunity to deny the report’s findings.

In fact, in the space of just a couple months now, the Times has chosen to grant Muller not just one, but two opportunities to mislead its readers about climate change and the threat it poses.

The Times has now published another op-ed by Muller wherein he misrepresented the potential linkages between climate change and extreme weather–tornadoes to be specific, which he asserted would be less of a threat in a warmer world. The truth is that the impact of global warming on tornadoes remains uncertain, because the underlying science is nuanced and there are competing factors that come into play.

The Huffington Post published an objective piece about the current state of the science earlier this year in the wake of the devastating and unprecedented Oklahoma tornadoes.

That piece accurately quoted a number of scientists including myself on the potential linkages. I pointed out to the journalist that there are two key factors: warm, moist air is favorable for tornadoes, and global warming will provide more of it. But important too is the amount of “shear” (that is, twisting) in the wind. And whether there will, in a warmer world, be more or less of that in tornado-prone regions, during the tornado season, depends on the precise shifts that will take place in the jet stream–something that is extremely difficult to predict even with state-of-the-art theoretical climate models. That factor is a “wild card” in the equation.

So we’ve got one factor that is a toss-up, and another one that appears favorable for tornado activity. The combination of them is therefore slightly on the “favorable” side, and if you’re a betting person, that’s probably what you would go with. And this is the point that I made in the Huffington Post piece:

Michael Mann, a climatologist who directs the Earth System Science Center at Pennsylvania State University, agreed that it’s too early to tell.

“If one factor is likely to be favorable and the other is a wild card, it’s still more likely that the product of the two factors will be favorable,” said Mann. “Thus, if you’re a betting person — or the insurance or reinsurance industry, for that matter — you’d probably go with a prediction of greater frequency and intensity of tornadoes as a result of human-caused climate change.”

Now watch the sleight of hand that Muller uses when he quotes me in his latest Times op-ed:

Michael E. Mann, a prominent climatologist, was only slightly more cautious. He said, “If you’re a betting person — or the insurance or reinsurance industry, for that matter — you’d probably go with a prediction of greater frequency and intensity of tornadoes as a result of human-caused climate change.”

Completely lost in Muller’s selective quotation is any nuance or context in what I had said, let alone the bottom line in what I stated: that it is in fact too early to tell whether global warming is influencing tornado activity, but we can discuss the processes through which climate change might influence future trends.

Muller, who lacks any training or expertise in atmospheric science, is more than happy to promote with great confidence the unsupportable claim that global warming will actuallydecrease tornado activity. His evidence for this? The false claim that the historical data demonstrate a decreasing trend in past decades.

Actual atmospheric scientists know that the historical observations are too sketchy and unreliable to decide one way or another as to whether tornadoes are increasing or not (see this excellent discussion by weather expert Jeff Masters of The Weather Underground).

So one is essentially left with the physical reasoning I outlined above. You would think that a physicist would know how to do some physical reasoning. And sadly, in Muller’s case, you would apparently be wrong…

To allow Muller to so thoroughly mislead their readers, not once, but twice in the space of as many months, is deeply irresponsible of the Times. So why might it be that the New York Times is so enamored with Muller, a retired physicist with no training in atmospheric or climate science, when it comes to the matter of climate change?

I discuss Muller’s history as a climate change critic and his new-found role as a media favorite in my book “The Hockey Stick and the Climate Wars” (the paperback was just released a couple weeks ago, with a new guest foreword by Bill Nye “The Science Guy”).

Muller is known for his bold and eccentric, but flawed and largely discredited astronomical theories. But he rose to public prominence only two years ago when he cast himself in theirresistible role of the “converted climate change skeptic”.

Muller had been funded by the notorious Koch Brothers, the largest current funders of climate change denial and disinformation, to independently “audit” the ostensibly dubious science of climate change. This audit took the form of an independent team of scientists that Muller picked and assembled under the umbrella of the “Berkeley Earth Surface Temperature” (unashamedly termed “BEST” by Muller) project.

Soon enough, Muller began to unveil the project’s findings: First, in late 2011, he admitted that the Earth was indeed warming. Then, a year later he concluded that the warming was not only real, but could only be explained by human influence.

Muller, in short, had rediscovered what the climate science community already knew long ago.

summarized the development at the time on my Facebook page:

Muller’s announcement last year that the Earth is indeed warming brought him up to date w/ where the scientific community was in the the 1980s. His announcement this week that the warming can only be explained by human influences, brings him up to date with where the science was in the mid 1990s. At this rate, Muller should be caught up to the current state of climate science within a matter of a few years!

The narrative of a repentant Koch Brothers-funded skeptic who had “seen the light” andappeared to now endorse the mainstream view of human-caused climate change, was simply too difficult for the mainstream media to resist. Muller predictably was able to position himself as a putative “honest broker” in the climate change debate. And he was granted a slew of op-eds in the New York Times and Wall Street Journal, headline articles in leading newspapers, and interviews on many of the leading television and radio news shows.

Yet Muller was in reality seeking to simply take credit for findings established by otherscientists (ironically using far more rigorous and defensible methods!) literally decades ago. In 1995 the IPCC had already concluded, based on work by Ben Santer and other leading climate scientists working on the problem of climate change “detection and attribution”, that there was already now a “discernible human influence” on the warming of the planet.

And while Muller has now admitted that the Earth had warmed and that human-activity is largely to blame, he has used his new-found limelight and access to the media to:

1. Smear and misrepresent other scientists, including not just me and various other climate scientists like Phil Jones of the UK’s University of East Anglia, but even the President of the U.S. National Academy of Sciences himself, Ralph Cicerone.

2. Misrepresent key details of climate science, inevitably to downplay the seriousness of climate change, whether it is the impacts on extreme weather and heat, drought, Arctic melting, or the threat to Polar Bears. See my own debunking of various falsehoods that Muller has promoted in his numerous news interviews e.g. here or here.

3. Shill for fossil fuel energy, arguing that the true solution to global warming isn’t renewable or clean energy. No, not at all! Muller is bullish on fracking and natural gas as the true solution.

To (a) pretend to accept the science, but attack the scientists and misrepresent so many important aspect of the science, downplaying the impacts and threat of climate change, while (b) acting as a spokesman for natural gas, one imagines that the petrochemical tycoon Koch Brothers indeed were probably quite pleased with their investment. Job well done. As I put it in an interview last year:

It would seem that Richard Muller has served as a useful foil for the Koch Brothers, allowing them to claim they have funded a real scientist looking into the basic science, while that scientist– Muller—props himself up by using the “Berkeley” imprimatur (UC Berkeley has not in any way sanctioned this effort) and appearing to accept the basic science, and goes out on the talk circuit, writing op-eds, etc. systematically downplaying the actual state of the science, dismissing key climate change impacts and denying the degree of risk that climate change actually represents. I would suspect that the Koch Brothers are quite happy with Muller right now, and I would have been very surprised had he stepped even lightly on their toes during his various interviews, which he of course has not. He has instead heaped great praise on them, as in this latest interview.

The New York Times does a disservice to its readers when it buys into the contrived narrative of the “honest broker”–Muller as the self-styled white knight who must ride in to rescue scientific truth from a corrupt and misguided community of scientists. Especially when that white knight is in fact sitting atop a Trojan Horse–a vehicle for the delivery of disinformation, denial, and systematic downplaying of what might very well be the greatest threat we have yet faced as a civilization, the threat of human-caused climate change.

Shame on you New York Times. You owe us better than this.

Michael Mann is Distinguished Professor of Meteorology at Pennsylvania State University and author of The Hockey Stick and the Climate Wars: Dispatches from the Front Lines (now available in paperback with a new guest foreword by Bill Nye “The Science Guy”)

Majority of red-state Americans believe climate change is real, study shows (The Guardian)

Study suggests far-reaching acceptance of climate change in traditionally Republican states such as Texas and Oklahoma

, US environment correspondent

theguardian.com, Wednesday 13 November 2013 19.40 GMT

Texas droughtA cracked lake bed in Texas. Findings in this study are likely based on personal experiences of hot weather. Photograph: Tony Gutierrez/AP

A vast majority of red-state Americans believe climate change is real and at least two-thirds of those want the government to cut greenhouse gas emissions, new research revealed on Wednesday.

The research, by Stanford University social psychologist Jon Krosnick, confounds the conventional wisdom of climate denial as a central pillar of Republican politics, and practically an article of faith for Tea Party conservatives.

Instead, the findings suggest far-reaching acceptance that climate change is indeed occurring and is caused by human activities, even in such reliably red states as Texas and Oklahoma.

“To me, the most striking finding that is new today was that we could not find a single state in the country where climate scepticism was in the majority,” Krosnick said in an interview.

States that voted for Barack Obama, as expected, also believe climate change is occurring and support curbs on carbon pollution. Some 88% of Massachusetts residents believe climate change is real.

But Texas and Oklahoma are among the reddest of red states and are represented in Congress by Republicans who regularly dismiss the existence of climate change or its attendant risks.

Congressman Joe Barton of Texas and Senator Jim Inhofe of Oklahoma stand out for their regular denials of climate change as a “hoax”, even among Republican ranks.

However, the research found 87% of Oklahomans and 84% of Texans accepted that climate change was occurring.

Seventy-six percent of Americans in both states also believed the government should step in to limit greenhouse gas emissions produced by industry.

In addition, the research indicated substantial support for Obama’s decision to use the Environmental Protection Agency to cut emissions from power plants. The polling found at least 62% of Americans in favour of action cutting greenhouse gas emissions from plants.

Once again, Texas was also solidly lined up with action, with 79% of voters supporting regulation of power plants.

The acceptance of climate change was not a result of outreach efforts by scientists, however, or by the experience of extreme events, such as hurricane Sandy, Krosnick said.

His research found no connection between Sandy and belief in climate change or support for climate action.

Instead, he said the findings suggest personal experiences of hot weather – especially in warm states in the south-west – persuaded Texans and others that the climate was indeed changing within their own lifetimes.

“Their experience with weather leaves people in most places on the green side in most of the questions we ask,” he said.

There was some small slippage in acceptance of climate change in north-western states such as Idaho and Utah and in the industrial heartland states of Ohio. But even then at a minimum, 75% believed climate change was occurring.

The findings, represented in a series of maps, were presented at a meeting of the bicameral task force on climate change which has been pushing Congress to try to move ahead on Obama’s green commitments. There was insufficient data to provide findings from a small number of states

Henry Waxman, the Democrat who co-chairs the taskforce, said in a statement the findings showed Americans were ready to take action to cut emissions that cause climate change.

“This new report is crystal clear,” said Waxman. “It shows that the vast majority of Americans – whether from red states or blue – understand that climate change is a growing danger. Americans recognise that we have a moral obligation to protect the environment and an economic opportunity to develop the clean energy technologies of the future. Americans are way ahead of Congress in listening to the scientists.”

Some 58% of Republicans in the current Congress deny the existence of climate change or oppose action to cut greenhouse gas emissions, according to an analysis by the Center for American Progress.

Crops, Towns, Government (London Review of Books)

Vol. 35 No. 22 · 21 November 2013
pages 13-15 | 3981 words

James C. Scott

The World until Yesterday: What Can We Learn from Traditional Societies? by Jared DiamondPenguin, 498 pp, £8.99, September, ISBN 978 0 14 102448 6

 

It’s a good bet a culture is in trouble when its best-known intellectuals start ransacking the cultural inventory of its ancestors and its contemporary inferiors for tips on how to live. The malaise is all the more remarkable when the culture in question is the modern American variant of Enlightenment rationalism and progress, a creed not known for self-doubt or failures of nerve. The deeper the trouble, the more we are seen to have lost our way, the further we must go spatially and temporally to find the cultural models that will help us. In the stronger versions of this quest, there is either a place – a Shangri-la – or a time, a Golden Age, that promises to reset our compass to true north. Anthropology and history implicitly promise to provide such models. Anthropology can show us radically different and satisfying forms of human affiliation and co-operation that do not depend on the nuclear family or inherited wealth. History can show that the social and political arrangements we take for granted are the contingent result of a unique historical conjuncture.

Jared Diamond, ornithologist, evolutionary biologist and geographer, is best known as the author of Guns, Germs and Steel: A Short History of Everybody for the Last 13,000 Years, one of the most influential accounts of how most of us came to live in places with huge concentrations of people, grain and domesticated animals, and how this helped create the world of massive inequalities and disparate life chances with which we now live. Diamond’s was not a simple, self-congratulatory ‘rise of the West’ story, telling how some peoples and cultures showed themselves to be essentially cleverer, braver or more rational than others. Instead, he demonstrated the importance of impersonal environmental forces: plants and herd animals amenable to domestication, pathogens, a favourable climate and geography that aided the rise of early states in the Fertile Crescent and the Mediterranean. These initial advantages were compounded by interstate competition in metallurgy for armaments and navigational devices. His argument was much praised for its bold and original synthesis, and much criticised by historians and anthropologists for reducing the arc of human history to a handful of environmental conditions. There was no denying, however, that Diamond’s simple quasi-Darwinian view of human selection was ‘good to think with’.

The subtitle of his new foray into deep history, ‘What Can We Learn from Traditional Societies?’, suggests, without a trace of irony, that it might be more at home in the self-help section of the bookstore. By ‘traditional societies’, he by and large means hunting and gathering and small horticultural societies that have survived into the modern world in the marginal and stingy environments into which states have pushed them. They span the globe, but Diamond draws his principal examples from New Guinea and Australia, where his bird-watching interests lie, and from the findings of studies of hunter-gatherer societies (the Hadza and !Kung of Africa, the Piraha, Siriono and Yanomamo of Latin America) that fit best with his argument.

What could these historical relics possibly teach the wired, hyper-modernist residents of Diamond’s home village of Los Angeles? The question is not so preposterous. As he explains, Homo sapiens has been around for roughly 200,000 years and left Africa not much earlier than 50,000 years ago. The first fragmentary evidence for domesticated crops occurs roughly 11,000 years ago and the first grain statelets around 5000 years ago, though they were initially insignificant in a global population of perhaps eight million. More than 97 per cent of human experience, in other words, lies outside the grain-based nation-states in which virtually all of us now live. ‘Until yesterday’, our diet had not been narrowed to the three major grains that today constitute 50 to 60 per cent of the world’s caloric intake: rice, wheat and maize. The circumstances we take for granted are, in fact, of even more recent vintage than Diamond supposes. Before, say, 1500, most populations had a sporting chance of remaining out of the clutches of states and empires, which were still relatively weak and, given low rates of urbanisation and forest clearance, still had access to foraged foods. On this account, our world of grains and states is a mere blink of the eye (0.25 per cent), in the historical adventure of our species.

Why, Diamond asks, should we not plumb this vast historical record of human experience for what it might teach our WEIRD – ‘Western, educated, industrialised, rich and democratic’ – societies? Though they are the most thoroughly studied of societies, they are totally unrepresentative. If we wish to generalise about human nature, not to mention the history of human experience, we must, he argues, cast our net more widely.

Traditional societies in effect represent thousands of natural experiments in how to construct a human society. They have come up with thousands of solutions to human problems, solutions different from those adopted by our own WEIRD modern societies. We shall see that some of these solutions – for instance, some of the ways in which traditional societies raise their children, treat their elderly, remain healthy, talk, spend their leisure time and settle disputes – may strike you, as they do me, as superior to normal practices in the First World.

The lens through which Diamond, an unrelenting environmental biologist, sees the world affords striking insights but there are still massive blind spots. His discussion of languages, for example, is both passionate and convincing, as one might expect from a scholar whose New Guinea field site is home to roughly a thousand of Earth’s seven thousand languages. Aside from the ‘nine giants’ (Mandarin, Spanish, English, Arabic, Hindi, Bengali, Portuguese, Russian and Japanese), each with more than a hundred million speakers, the rest have on average only a few thousand speakers and a great many have far fewer. The ‘giants’ create vast heartland zones of monolingual citizens within which minor languages are exterminated. Inasmuch as language ‘speciation’ depends largely on dispersal and isolation, the contemporary processes of concentration and cultural homogenisation militate against the development of new languages and the survival of those already endangered. Half of the roughly 250 Australian languages are extinct, one third of the hundreds of Native American languages spoken in 1492 have disappeared and another third are unlikely to survive another generation. Each heartland of a ‘giant’ language is the graveyard of the languages it has overwhelmed.

The commonest contemporary cause of death is cultural and economic engulfment: the majority language so dominates the public sphere, media, schools and government that mastering it is the sole route to employment, social status and cultural citizenship. Diamond pauses to consider the argument that the consolidation of languages might be a fine thing. After all, eliminating language barriers makes for better mutual understanding. Why would one prefer a world in which hill peoples navigate through a linguistic thicket in which they must operate in five or more languages, as his informants do in the New Guinea Highlands?

Here, Diamond, as evolutionary biologist, has two choices. He could claim that the extinction of languages is the process of natural selection at work, just as the scientific racists of the late 19th century claimed that the extermination of backward tribal peoples like the Herero was a tragic but inevitable result of the expansion of superior races. But instead, he takes up a position not unlike that held by E.O. Wilson on the disappearance of species. He argues that just as natural diversity is a treasury of variation and resilience, so linguistic diversity represents a cultural treasury of expression, thought-ways and cosmology that, once lost, is gone for ever.

Literature, culture and much knowledge are encoded in languages: lose the language and you lose much of the literature, culture and knowledge … Traditional peoples have local-language names for hundreds of animal and plant species around them; those encyclopedias of ethnobiological information vanish when their languages vanish … Tribal peoples also have their own oral literatures, and losses of those literatures also represent losses to humanity.

It is undeniable that we are in danger of irrecoverably losing a large part of mankind’s cultural, linguistic and aesthetic heritage from the effects of ‘steamroller’ languages and states. But what a disappointment it is, after nearly five hundred pages of anecdotes, assertions, snippets of scientific studies, observations, detours into the evolution of religion, reports of near-death experiences – Diamond can be a gripping storyteller – to hear the lessons he has distilled for us. We should learn more languages; we should practise more intimate and permissive child-rearing; we should spend more time socialising and talking face to face; we should utilise the wisdom and knowledge of our elders; we should learn to assess the dangers in our environment more realistically. And, when it comes to daily health tips, you have to imagine Diamond putting on his white coat and stethoscope as he recommends ‘not smoking; exercising regularly; limiting our intake of total calories, alcohol, salt and salty foods, sugar and sugared soft drinks, saturated and trans fats, processed foods, butter, cream and red meat; and increasing our intake of fibre, fruits and vegetables, calcium and complex carbohydrates. Another simple change is to eat more slowly.’ Perhaps wary of resistance to a fully fledged hunter-gatherer diet, he recommends the Mediterranean diet. Those who have trekked all this way with him, through the history of the species and the New Guinea Highlands, must have expected something more substantial awaiting them at the end of the trail.

*

What were our ancestors like before the domestication of plants and animals, before sedentary village life, before the earliest towns and states? That is the question Diamond sets himself to answer. In doing so, he faces nearly insurmountable obstacles. Until quite recently, archaeology recorded our history as a species in relation to the concentration of debris (middens, building rubble, traces of irrigation canals, walls, fossilised faeces etc) we left behind. Hunter-gatherers were typically mobile and spread their largely biodegradable debris widely; we don’t often find their temporary habitats, which were often in caves or beside rivers or the sea, and the vast majority of such sites have been lost to history. When we do find them, they can tell us something about their inhabitants’ diet, cooking methods, bodily adornment, trade goods, weapons, diseases, local climate and occasionally even causes of death, but not much else. How to infer from this scant evidence our ancestors’ family structure and social organisation, their patterns of co-operation and conflict, let alone their ethics and cosmology?

It is here that Diamond makes his fundamental mistake. He imagines he can triangulate his way to the deep past by assuming that contemporary hunter-gatherer societies are ‘our living ancestors’, that they show what we were like before we discovered crops, towns and government. This assumption rests on the indefensible premise that contemporary hunter-gatherer societies are survivals, museum exhibits of the way life was lived for the entirety of human history ‘until yesterday’ – preserved in amber for our examination.

In the unique case of Highland New Guinea, which was apparently isolated from coastal trade and the outside world until World War Two, Diamond might be forgiven for making this inference, though the people of New Guinea have had exactly the same amount of time to adapt and evolve as homo americanus and they managed somehow to get hold of the sweet potato, which originated in South America. The inference of pristine isolation, however, is completely unwarranted for virtually all of the other 35 societies he canvasses. Those societies have, for the last five thousand years, been deeply involved in a world of trade, states and empires and are often now found in undesirable marginal areas to which they have been pushed by more powerful societies. The anthropologist Pierre Clastres argued that the Yanomamo and Siriono, two of Diamond’s prime examples, were originally sedentary cultivators who turned to foraging in order to escape the forced labour and disease associated with Spanish settlements. Like almost all the groups Diamond considers, they have been trading with outside kingdoms and states (and raiding them) for much of the past three thousand years; their beliefs and practices have been shaped by contact, trade goods, travel and intermarriage. So thoroughly have they come to live in a world of powerful kingdoms and states that one might call these societies themselves a ‘state effect’. That is, their location in the landscape is designed to help them evade or trade with larger societies. They forage forest and marine products desired by urban societies; many groups are ‘twinned’ with neighbouring societies, through which they manage their trade and relationship to the larger world.

Contemporary foraging societies, far from being untouched examples of our deep past, are up to their necks in the ‘civilised world’. Those available for Diamond’s inspection are, one might argue, precisely the most successful examples, showing how some hunter-gatherer societies have avoided extinction and assimilation by creatively adapting to the changing world. Taken together, they might make for an interesting study of adaptation, but they are useless as a metric to tell us what our remote ancestors were like. Even their designations – Yanomamo, !Kung, Ainu – convey a false sense of genealogical and genetic continuity, vastly understating the fluidity of these groups’ ethnic boundaries.

Diamond is convinced that violent revenge is the besetting plague of hunter-gatherer societies and, by extension, of our pre-state ancestors. Having chosen some rather bellicose societies (the Dani, the Yanomamo) as illustrations, and larded his account with anecdotal evidence from informants, he reaches the same conclusion as Steven Pinker in The Better Angels of Our Nature: we know, on the basis of certain contemporary hunter-gatherers, that our ancestors were violent and homicidal and that they have only recently (very recently in Pinker’s account) been pacified and civilised by the state. Life without the state is nasty, brutish and short. Though Hobbes is not directly invoked, his gloomy view of savage life without a sovereign infuses Diamond’s narrative. ‘First and foremost, a fundamental problem of virtually all small-scale societies is that, because they lack a central political authority exerting a monopoly of retaliatory force, they are unable to prevent recalcitrant members from injuring other members, and also unable to prevent aggrieved members from taking matters into their own hands and seeking to achieve their goals by violence. But violence invites counter-violence.’

*

In a passage that recapitulates the fable of the social contract, Diamond implies that it was explicitly to end this violence that subjects agreed to found a sovereign power that would guarantee peace and order by restraining their habits of violence and revenge.

Maintenance of peace within a society is one of the most important services that a state can provide. That service goes a long way towards explaining the apparent paradox that, since the rise of the first state governments in the Fertile Crescent about 5400 years ago, people have more or less willingly (not just under duress) surrendered some of their individual freedoms, accepted the authority of state governments, paid taxes and supported a comfortable individual lifestyle for the state’s leaders and officials.

Two fatal objections come immediately to mind. First, it does not follow that the state, by curtailing ‘private’ violence, reduces the total amount of violence. As Norbert Elias pointed out more than half a century ago in The Civilising Process, what the state does is to centralise and monopolise violence in its own hands, a fact that Diamond, coming as he does from a nation that has initiated several wars in recent decades and a state (California) that has a prison population of roughly 120,000 – most of them non-violent offenders – should appreciate.

Second, Hobbes’s fable at least has nominally equal contractants agreeing to establish a sovereign for their mutual safety. That is hard to reconcile with the fact that all ancient states without exception were slave states. The proportion of slaves seldom dropped below 30 per cent of the population in early states, reaching 50 per cent in early South-East Asia (and in Athens and Sparta as much as 70 and 86 per cent). War captives, conquered peoples, slaves purchased from slave raiders and traders, debt bondsmen, criminals and captive artisans – all these people were held under duress, as the frequency of state collapse, revolt and flight attests. As either a theory or a historical account of state-formation, Diamond’s story makes no sense.

The straw man in his argument is that contemporary hunter-gatherer societies are oases of peace, co-operation and order. Of course they are not. The question, rather, is how violent they are compared to state-societies and what are the causes of the violence that does exist. There is, contra Diamond, a strong case that might be made for the relative non-violence and physical well-being of contemporary hunters and gatherers when compared with the early agrarian states. Non-state peoples have many techniques for avoiding bloodshed and revenge killings: the payment of compensation or Weregild, arranged truces (‘burying the hatchet’), marriage alliances, flight to the open frontier, outcasting or handing over a culprit who started the trouble. Diamond does not seem to appreciate the strong social forces mobilised by kinsmen to restrain anyone contemplating a hasty and violent act that will expose all of them to danger. These practices are examined by many of the ethnographers who have carried out intensive fieldwork in the New Guinea Highlands (for example by Edward L. Schieffelin in The Sorrow of the Lonely and the Burning of the Dancers, Marilyn Strathern inWomen in Between, and Andrew Strathern and Pamela Stewart’s work on compensation), but they make no dent in Diamond’s one-dimensional view of the desire for revenge.

On the other side of the ledger, when it comes to violence in early agrarian states, one must weigh rebellion, war and systematic violence against slaves and women (as a rule of thumb, agrarian states everywhere created patriarchal property regimes which reduced the status and freedom of women) against ‘tribal conflicts’. We also know, and Diamond notes, that hunter-gatherers even today have healthier diets and far fewer communicable diseases. Believing, against the evidence, that hunters and gatherers live in daily fear of starvation, he fails to note that they also work far less hard and thus have far more leisure. Marshall Sahlins called hunter-gatherers, even when relegated to the most undesirable environments, ‘the original affluent society’. It’s hard to imagine Diamond’s primitives giving up their physical freedom, their varied diet, their egalitarian social structure, their relative freedom from famine, large-scale state wars, taxes and systematic subordination in exchange for what Diamond imagines to be ‘the king’s peace’. Reading his account one can get the impression that the choice facing hunters and gatherers was one between their world and, say, the modern Danish welfare state. In practice, their option was to trade what they had for subjecthood in the early agrarian state.

No matter how one defines violence and warfare in existing hunter-gatherer societies, the greater part of it by far can be shown to be an effect of the perils and opportunities represented by a world of states. A great deal of the warfare among the Yanomamo was, in this sense, initiated to monopolise key commodities on the trade routes to commercial outlets (see, for example, R. Brian Ferguson’s Yanomami Warfare: A Political History, a strong antidote to the pseudo-scientific account of Napoleon Chagnon on which Diamond relies heavily). Much of the conflict among Celtic and Germanic peoples on the fringes of Imperial Rome was essentially commercial war as groups jockeyed for access to Roman markets. The unprecedented riches conjured by the ivory trade in the late 19th century set off hundreds of wars among Africans for whom tusks were the currency that purchased muskets, power and trade goods. Borneo/Kalimantan was originally settled more than a millennium ago, it is now believed, by Austronesians who regarded it as an ideal foraging ground for the Chinese luxury market in feathers, camphor wood, tortoiseshell, bezoar stones, hornbill and rhinoceros ivory, and edible birds’ nests. They were there for trade, and that meant conflict over the most profitable sites for foraging and exchange. It would be impossible to understand intertribal warfare in colonial North America without considering the competition for fur trade profits that allowed the winners to buy firearms and allies, and to dominate their rivals.

In the world of states, hunter-gatherers and nomads, one commodity alone dominated all others: people, aka slaves. What agrarian states needed above all else was manpower to cultivate their fields, build their monuments, man their armies and bear and raise their children. With few exceptions, the epidemiological conditions in cities until very recently were so devastating that they could grow only by adding new populations from their hinterlands. They did this in two ways. They took captives in wars: most South-East Asian early state chronicles gauge the success of a war by the number of captives marched back to the capital and resettled there. The Athenians and Spartans might kill the men of a defeated city and burn its crops, but they virtually always brought back the women and children as slaves. And they bought slaves: a slave merchant caravan trailed every Roman war scooping up the slaves it inevitably produced.

The fact is that slaving was at the very centre of state-making. It is impossible to exaggerate the massive effects of this human commodity on stateless societies. Wars between states became a kind of booty capitalism, where the major prize was human traffic. The slave trade then completely transformed the non-state ‘tribal zone’. Some groups specialised in slave-raiding, mounting expeditions against weaker and more isolated groups and then selling them to intermediaries or directly at slave markets. The oldest members of highland groups in Laos, Thailand, Malaysia and Burma can recall their parents’ and grandparents’ memories of slave raids. The fortified, hilltop villages, with thorny, twisting and hidden approaches that early colonists found in parts of South-East Asia and Africa were largely a response to the slave trade.

There is plenty of violence in the world of hunter-gatherers, though it is hardly illuminated by resorting to statistical comparisons between the mortality rates of a tiny tribal war in Kalimantan and the Battle of the Somme or the Holocaust. This violence, however, is almost entirely a state-effect. It simply cannot be understood historically from 4000 BC forward apart from the appetite of states for trade goods, slaves and precious ores, any more than the contemporary threat to remote indigenous groups can be understood apart from the appetite of capitalism and the modern state for rare minerals, hydroelectric sites, plantation crops and timber on the lands of these peoples. Papua New Guinea is today the scene of a particularly violent race for minerals, aided by states and their militias and, as Stuart Kirsch’s Mining Capitalismshows, its indigenous politics can be understood only in this context. Contemporary hunter-gatherer life can tell us a great deal about the world of states and empires but it can tell us nothing at all about our prehistory. We have virtually no credible evidence about the world until yesterday and, until we do, the only defensible intellectual position is to shut up.

Oldest Clam Consternation Overblown (National Geographic)

A photo of ming the clam.

Shell valves from a specimen of Arctica islandica that was found to have lived for approximately 507 years are pictured here. The creature’s death has generated some consternation about marine researchers that looks a bit overblown.

PHOTOGRAPH COURTESY BANGOR UNIVERSITY

Samantha Larson

for National Geographic

PUBLISHED NOVEMBER 16, 2013

Consternation over the death of the world’s oldest-recorded animal, a 507-year-old clam nicknamed Ming, has earned marine researchers unhappy headlinesworldwide.

But a closer look at the story—”Clam-gate,” as the BBC called it—finds the tempest over Ming a bit overblown. (Also see “Clams: Not Just for Chowder.”)

News of the clam’s death, first noted in 2007, took on a life of its own this week after researchers led by James Scourse, from the United Kingdom’s Bangor University, reanalyzed its age and announced the 507-year estimate.

Contrary to news reports, the researchers say they did not kill the elderly clam for the ironic-seeming purpose of finding out its age.

“This particular animal was one of about 200 that were collected live from the Icelandic shelf in 2006,” explains climate scientist Paul Butlerfrom the same U.K. university, who, along with Scourse, dredged up the clam as part of a research project to investigate climate change over the past thousand years.

All 200 clams were killed when they were frozen on board to take them home. They didn’t find out how old Ming was until they were back in the lab and looked at its shell under a microscope.

Ming Dynasty Survivor

When Ming first made headlines in 2007, the researchers said they thought it was about 405 years old, earning it even then the title of the oldest-known animal.

After the more recent reanalysis, they realized that the bivalve was even more impressive than they had thought.

In the year Ming was born, Leonardo da Vinci was at work on the “Mona Lisa,” the first recorded epidemic of smallpox hit the New World, and the Ming dynasty ruled China (hence the name). Ming was 52 years old when Queen Elizabeth I took the throne.

Clam Age Counting

The researchers determined Ming’s age by counting the number of bands in its shell. This type of clam, the ocean quahog, grows a new band every year. (Also see “Giant Clam.”)

The 100-year age discrepancy resulted from the 2007 analysis examining a part of Ming’s shell where some of the bands were so narrow they couldn’t be separated from each other.

Scourse, a marine geologist, says that the new age has been verified against radiocarbon dating and is “pretty much without error.”

Clams Don’t Carry Birth Certificates

When Scourse and Butler dredged up the live clam, they had what appeared to be an everyday quahog, an animal that could fit into the palm of their hand.

As Madelyn Mette, a Ph.D. student at Iowa State University in Ames who also studies these clams, explains, “Once they reach a certain age, they don’t get a lot bigger per year … If you have a large clam, you can’t always tell if it’s 100 years old or 300 years old, because there’s very little difference in size.”

Scourse points out that the 200 clams they sampled represented a very small fraction of the world’s entire clam population. For that reason, even if Ming was the oldest animal that we knew, the chances that it was actually the oldest quahog out there in the ocean depths are “infinitesimally small.”

How About Some Chowdah?

In fact, it isn’t unthinkable that someone might eat a clam of Ming’s age for lunch—ocean quahogs from the North Atlantic are one of the main species used in clam chowder.

If nothing else, Ming’s sacrifice should help out Scourse and Butler’s research, looking at long-term climate impacts on sea life over the past few centuries.

“The 507-year-old is at the top end of the series,” Scourse says. “From this we can get annual records of marine climate change, which so far we’ve never been able to get from the North Atlantic.”

Conheça o animal que mais salvou vidas humanas até hoje (Engenheria É)

Acessado em 18/11/2013.

Por Mauro Sérgio Ribeiro de Souza

Nas últimas semanas muitas pessoas tem protestado por conta do uso de animais em pesquisas. Teve o caso dos Beagles, testes em macacos, ratos e etc. Mas e você, sabe qual o animal que mais salvou vidas humanas até hoje?

Não é o cão, como muita gente pode ter pensado, nem mesmo o leal cavalo, nem o valente pombo-mensageiro. O salvador vem do mar: é o caranguejo-ferradura!

caranguejo_ferradura_03O caranguejo-ferradura (Limulus polyphemus) é um dos seres vivos mais antigos que existem no planeta. Uma estranha criatura que parece saída do filme “Alien”, capaz de suportar até um ano sem se alimentar e de resistir temperaturas e salinidades extremas. Um fóssil vivo que habita nosso planeta há 445 milhões de anos, antes mesmo que os dinossauros.

Hoje em dia, seu número encontra-se em decréscimo de forma lenta, mas constante, devido à mudança climática, a pesca predatória e a captura para a indústria farmacêutica. Infelizmente para o bicho, seu cotado sangue azul tem numerosos usos médicos e é utilizado para salvar inumeras vidas humanas.

Desde 1950, quando cientistas descobriram que o sangue de cor azul do caranguejo-ferradura se coagulava em contato com as bactérias E.coli e Salmonela, as pesquisas nunca mais pararam. Um destes últimos estudos se concentrou em um peptídeo que os caranguejos-ferradura elaboram e que inibe a replicação do Vírus da Imunodeficiência Humana.

Os ensaios pré-clínicos mostram que é tão efetivo como a zidovudina, um medicamento clássico contra a AIDS. Inclusive astronautas da NASA testaram na Estação Espacial Internacional um dispositivo médico de alta tecnologia que utiliza enzimas primitivas dos caranguejos-ferradura para o diagnóstico de doenças humanas.

O segredo que faz com que o sangue do caranguejo seja de grande utilidade para a indústria biomédica está baseado na simplicidade e efetividade de seu sistema imunológico. Uma verdadeira cascata de enzimas, que produzem coagulação quando se encontram com o material das paredes celulares da maioria das bactérias. Os caranguejos-ferradura vivem sob constante ameaça da infecção em um habitat que pode conter milhares de milhões de bactérias por mililitro.

A diferença dos seres humanos, os caranguejos não têm hemoglobina no sangue, com isso, eles utilizam a hemocianina para transportar oxigênio. E é devido à presença de cobre na hemocianina e não de ferro, que o sangue adquire a peculiar cor azul.

caranguejo_ferradura_07É tão importante este sangue azul que provavelmente muitos de nós devemos a vida a esses caranguejos. E não é um exagero já que o LAL (lisado de amebócitos de Limulus) extrato aquoso de amebócitos do caranguejo é utilizado com frequência em testes para detectar as endotoxinas bacterianas em numerosos produtos farmacêuticos. Além de ser uma forma singela, barata e segura para detectar impurezas, é uma ferramenta importante no desenvolvimento de novos antibióticos e vacinas.

O sangue do caranguejo-ferradura não só se converteu em uma poderosa “arma médica”, como também é um grande negócio. No mercado mundial, um litro de sangue deste caranguejo tem um preço aproximado de 15.000 dólares.

Ao ano, precisa-se do sangue de pelo menos 500.000 caranguejos, dos quais são extraídos em torno de 100 mililitros perfurando o pericárdio de seu primitivo coração. Mas, calma! Antes que você ache que os bichinhos precisem morrer para isso, saiba que o sacrifício deles não é necessário. Para obter o seu sangue valioso, os caranguejos são “ordenhados” manualmente por profissionais cuidadosos e, apesar de perderem 30% de seu peso, depois eles se recuperaram rápido e são devolvidos à água. Durante o processo, “apenas” 15% dos caranguejos morrem.

Os caranguejos passam por essa ordenha apenas uma vez por ano, sendo que seu sangue é posteriormente congelado, desidratado e, em seguida, enviado às instituições de pesquisas médicas e laboratórios.

caranguejo_ferradura_05

Mudanças climáticas impulsionam tragédias naturais (O Globo)

JC e-mail 4855, de 13 de novembro de 2013

Condições meteorológicas extremas mataram 530 mil e causaram prejuízos de US$ 2,5 trilhões nos últimos 20 anos

Nos últimos 20 anos as condições meteorológicas extremas mataram 530 mil pessoas no mundo, causando prejuízos econômicos que chegam a US$ 2,5 trilhões, de acordo com o Germanwatch, instituição financiada pelo governo alemão. Este ano, somente o supertufão Haiyan, a 24ª tempestade tropical que assolou as Filipinas em 2013, pode ter matado 10 mil pessoas, embora o presidente Benigno Aquino agora negue a informação. Apesar dos números crescentes de fenômenos naturais extremos, muitos especialistas ainda temem traçar uma ligação direta com as mudanças no clima. A pergunta que muitos se fazem é até quando essa negativa vai continuar emperrando uma negociação mais contundente sobre as reduções das emissões de Gases de Efeito Estufa (GEE), ainda apontados como principal motivo das alterações climáticas.

Em 2012, os países mais afetados por desastres naturais foram o Paquistão, o Haiti e justamente as Filipinas, divulgou ontem a Organização das Nações Unidas.

– A tragédia humana causada pelo desdobramento do Haiyan só será capturada em relatórios futuros – afirmou Soenke Kreft, coautor do documento divulgado nos bastidores da 19ª Conferência do Clima (COP-19), que acontece desde a última segunda-feira na Polônia.

Durante a abertura do evento, o delegado filipino Naderev Sano anunciou greve de fome até o final da conferência, e ontem foi seguido por 30 ativistas num ato tido como o mais importante do segundo dia de debates.

– Vamos fazer um jejum em solidariedade à delegação filipina, com as vítimas do tufão, e até que se concretizem ações políticas reais nesta COP-19 – disse Angeli Apparedi, coordenadora da iniciativa que uniu ONGs de todo o mundo para a causa filipina.

Sano lembrou a urgência de medidas concretas contra o aquecimento global para evitar tragédias como a do Haiyan e pediu para que os países desenvolvidos reduzissem as emissões e aumentassem seu comprometimento com o Fundo Verde do Clima, que deveria repassar US$ 100 bilhões aos países em desenvolvimento para a mitigação das emissões e adaptações aos impactos das mudanças climáticas em 2020. Até 30 de julho deste ano, o fundo, que foi criado em 2010, tinha apenas US$ 9 milhões.

Os desastres e o clima
Apesar do receio do mundo científico em afirmar que essas tragédias estão ligadas às mudanças climáticas, alguns efeitos causados pelo aumento das temperaturas do planeta já são apontados como a principal causa da maior intensidade dos ciclones tropicais.

– Uma coisa é bastante concreta – afirmou Will Steffen, diretor-executivo do “Australian National Climate Change Institute” à Reuters. – A mudança climática está causando o aquecimento das águas da superfície, o que, por sua vez, aumenta a energia deste tipo de tempestade.

Ontem, a Organização Meteorológica Mundial (OMM) divulgou que a média mundial de temperatura entre janeiro e setembro deste ano foi meio ponto superior à registrada entre 1961 e 1990, o que faz de 2013 o ano mais quente da História. Além do aquecimento das águas, o aumento do nível do mar também é outro potencializador do tufões, dizem os especialistas. O relatório da OMM apontou que o nível dos mares e oceanos aumenta em média 3,2 milímetros por ano desde 1993.

– Não podemos afirmar que um fenômeno específico está ligado ou não às mudanças climáticas, pois eles naturalmente sempre aconteceram – diz André Ferretti, coordenador de estratégias de conservação da Fundação Grupo Boticário e também do Observatório do Clima, que acompanha as negociações na Polônia. – Mas já é possível dizer que eles estão mais fortes e frequentes por causa das alterações do clima. Infelizmente isso não deve pressionar os governos para um acordo na COP-19.

Resistência a metas globais atrasam acordo
Um encontro que nasce errado, parte de um raciocínio antigo e é encerrado sem conclusões. Este quadro se encaixa em todos os painéis dedicados ao debate sobre as mudanças climáticas realizados nos últimos anos. Para especialistas, a fórmula pode se repetir nesta Convenção do Clima (COP-19).

Os países em desenvolvimento chegaram à Polônia insistindo em uma tese nascida há mais de 15 anos: “Responsabilidades Comuns, Porém Diferenciadas” no combate às mudanças climáticas. Segundo ela, só nações desenvolvidas devem submeter-se a metas para redução das emissões de CO2.

– É um raciocínio muito simplório – ataca Bernardo Baeta Neves Strassburg, diretor-executivo do Instituto Internacional para Sustentabilidade (IIS) e professor do Departamento de Geografia e Meio Ambiente da PUC-Rio. – Desde que este argumento passou a ser usado, Brasil, Índia e China tornaram-se potências mundiais e, por isso, deveriam ter metas obrigatórias para diminuir suas emissões.

Brasil em posição ambígua
Entre os países emergentes, o Brasil seria o mais disposto a aceitar um acordo que limite a emissão de CO2, mas o governo estaria esperando a decisão da China, maior emissora mundial de gases-estufa, que negocia metas mais modestas.

Para Osvaldo Stella, diretor do Programa de Mudanças Climáticas do Instituto de Pesquisa Ambiental da Amazônia (Ipam), o Brasil perdeu força nas conferências internacionais.

– Temos uma posição ambígua – critica. – Estamos entre as maiores economias do mundo, mas nossos problemas estruturais são idênticos aos dos países pobres. Essa contradição dificulta nossa habilidade em negociar.

Strassburg e Stella criticam o modelo do painel da COP, em que as decisões devem ser aceitas por unanimidade.

– É claro que o debate precisa ser democrático, mas questões tão importantes para a Humanidade não podem esbarrar no bloqueio de um determinado tema – ressalta Stella.

Ambos concordam que esta conferência, assim como a COP-20 – que será realizada no ano que vem, no Peru – são fundamentais para que, em 2015, os governantes enfim assinem um acordo que limite as emissões de CO2.

No início da semana, o Painel Intergovernamental de Mudanças Climáticas (IPCC) divulgou algumas adaptações em seu último relatório, concluído em setembro. As mudanças, segundo os cientistas, não são significativas, e foram descobertas após a revisão do documento.

(Maria Clara Serra e Renato Grandelle/O Globo)
http://oglobo.globo.com/ciencia/mudancas-climaticas-impulsionam-tragedias-naturais-10763216#ixzz2kX73SZ00

Against storytelling of scientific results (Nature Methods)

Yarden Katz

Nature Methods 10, 1045 (2013) doi:10.1038/nmeth.2699 – Published online

30 October 2013

To the Editor:

Krzywinski and Cairo1 beautifully illustrate the widespread view that scientific writing should follow a journalistic ‘storytelling’, wherein the choice of what data to plot, and how, is tailored to the message the authors want to deliver. However, they do not discuss the pitfalls of the approach, which often result in a distorted and unrepresentative display of data—one that does not do justice to experimental complexities and their myriad of interpretations.

If we project the features of great storytellers onto a scientist, the result is a portrait of a scientist far from ideal. Great storytellers embellish and conceal information to evoke a response in their audience. Inconvenient truths are swept away, and marginalities are spun to make a point more spectacular. A storyteller would plot the data in the way most persuasive rather than most informative or representative.

Storytelling encourages the unrealistic view that scientific projects fit a singular narrative. Biological systems are difficult to measure and control, so nearly all experiments afford multiple interpretations—but storytelling actively denies this fact of science.

The ‘story-told’ scientific paper is a constrictive mapping between figures and text. Figures produced by masters of scientific storytelling are so tightly controlled to match the narrative that the reader is left with little to ponder or interpret. Critical reading of such papers becomes a detective’s game, in which one reads between the lines for clues of data relegated to a supplement for their deviance from ‘the story’.

Dissecting the structure of scientific papers, Bruno Latour explains the utility of the storytelling approach in giving readers the sense that they are evaluating the data along with the authors while simultaneously persuading them of the story. The storytelling way to achieve this is “to lay out the text so that wherever the reader is there is only one way to go”2—or as Krzywinski and Cairo put it, “Inviting readers to draw their own conclusions is risky”1. Authors prevent this by “carefully stacking more black boxes, less easily disputable arguments”2. This is consistent with the visualization advice that Krzywinski and Cairo give: the narrower and more processed the display of the data is to fit the story, the more black boxes are stacked, making it harder for the reader to access data raw enough to support alternative models or ‘stories’.

Readers and authors know that complex experiments afford multiple interpretations, and so such deviances from the singular narrative must be present somewhere. It would be better for both authors and readers if these could be discussed openly rather than obfuscated. For those who plan to follow up on the results, these discrepancies are often the most important. Storytelling therefore impedes communication of critical information by restricting the scope of the data to that agreeable with the story.

Problems arise when experiments are driven within a storytelling framework. In break rooms of biology research labs, one often hears: “It’d be a great story if X regulated Y by novel mechanism Z.” Experiments might be prioritized by asking, “Is it important for your story?” Storytelling poses a dizzying circularity: before your findings are established, you should decide whether these are the findings you would like to reach. Expectations of a story-like narrative can also be demoralizing to scientists, as most experimental data do not easily fold into this framing.

Finally, a great story in the journalistic sense is a complete one. Papers that make the unexplained observations transparent get penalized in the storytelling framework as incomplete. This prevents the communal puzzle-solving that arises by piecing together unexplained observations from multiple papers.

The alternative to storytelling is the usual language of evidence and arguments that are used—with varying degrees of certainty—to support models and theories. Speaking of models and their evidence goes back to the oldest of scientific discourse, and this framing is also standard in philosophy and law. This language allows authors to discuss evidence for alternative models without imposing a singular journalistic-like story.

There might be other roles for storytelling. Steven McKnight’s lab recently found, entirely unexpectedly, that a small molecule can be used to purify a complex of RNA-binding proteins in the cell, revealing a wide array of striking biological features3. It is that kind of story of discovery—what François Jacob called “night science”—that is often best suited for storytelling, though these narratives are often deemed by scientists as irrelevant ‘fluff’.

As practiced, storytelling shares more with journalism than with science. Journalists seek a great story, and the accompanying pressures sometimes lead to distortion in the portrayal of events in the press. When exerted on scientists, these pressures can yield similar results. Storytelling encourages scientists to design experiments according to what constitutes a ‘great story’, potentially closing off unforeseen avenues more exciting than any story imagined a priori. For the alternative framing to be adopted, editors, reviewers and authors (particularly at the higher-profile journals) will have to adjust their evaluation criteria and reward authors who choose representative displays while discussing alternative models to their own.

References

  1. Krzywinski, M. & Cairo, A. Nat. Methods 10, 687 (2013).
  2. Latour, B. Science in Action (Harvard Univ. Press, 1987).
  3. Baker, M. Nat. Methods 9, 639 (2012).