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Climate Scientist: 2 Degrees of Warming Too Much

By Andrea Thompson, Planet Earth Editor   |   December 04, 2013 03:27pm ET

 earth and thermometer showing increasing global surface temperatures

 Pin It A thermometer in the Earth shows increasing global climate sensitivity.

Credit: Eduard Härkönen | Shutterstock

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NEW YORK — Famed climate scientist and activist James Hansen has said it before, and he'll say it again: Two degrees of warming is too much.

International climate negotiators agreed in the Copenhagen Accord, a global agreement on climate change that took place at the 2009 United Nations' Climate Change Conference, that warming this century shouldn't increase by more than 2 degrees Celsius (3.6 degrees Fahrenheit) to avoid the worst impacts of climate change. But in a new paper published in the open-access journal PLOS ONE, Hansen and a cadre of co-authors from a wide array of disciplines argue that even 2 degrees is too much, and would "subject young people, future generations and nature to irreparable harm," Hansen wrote in an accompanying essay distributed to reporters.

The new study is a departure from the typical climate science paper, both for the wide variety of fields represented in the list of co-authors, which includes economist Jeffrey Sachs, as well as for the policy implications it raises, something climate scientists tend to shy away from. The authors also plainly state that humanity has a moral obligation to future generations, the type of statement scientists also tend to avoid.

En este artículo se habla acerca del cambio climático, habla sobre una conferencia realizada en 2009 en las naciones unidas en la cual  se hablo en especial que el planeta no debe aumentar  más de 2 grados centígrados de temperatura ya que los cambios climáticos serán peores a largo plazo y afectaran a generaciones futuras a largo plazo.