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Permafrost Could Release Vast Amounts of Carbon and Accelerate Climate Change by End of Century

A modeling study at a supercomputing facility run by France’s Alternative Energies and Atomic Energy Commission corrects the Intergovernmental Panel on Climate Change’s 2007 fourth assessment report’s underestimate of carbon available for release in permafrost. “It found that 62 petagrams of soil carbon will be released into the atmosphere by 2100, or about 68 billion U.S. tons. This release of carbon is equivalent to an additional 7.5 years of global anthropogenic emissions at today’s rate.” The modelling assumes an 8-degree-Celsius increase in arctic temperatures by 2100, and incorporates more detailed understanding of the specific dynamics of permafrost carbon storage and release.
Link: http://www.sciencedaily.com/releases/2011/08/110823115651.htm
Source: Science Daily / DOE/Lawrence Berkeley National Laboratory

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