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Conservation Science for a Healthy Planet

Scientific reticence on climate change- Jim Hansen

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26 October 2017  by James Hansen read this draft discussion and find links to other papers here

I am writing Scientific Reticence and the Fate of Humanity in response to a query from the editor of Atmospheric Chemistry and Physics who handled Ice Melt, Sea Level Rise and Superstorms. That paper, together with Young People’s Burden makes the case for a low global warming target and the urgency of phasing out fossil fuel emissions. We argue that global warming of 2°C , or even 1.5°C, is dangerous, because these levels are far above Holocene temperatures and even warmer than best estimates for the Eemian, when sea level reached 6-9 meters (20-30 feet) higher than today. Earth’s history shows that sea level adjusts to changes in global temperature. We conclude that eventual sea level rise of several meters could be locked in, if rapid emission
reductions do not begin soon, and could occur within 50-150 years with the extraordinary climate forcing of continued “business-as-usual” fossil fuel emissions….

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