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May 14, 2008

Thawing permafrost and methane emissions

Many researchers predict that thawing permafrost could release huge amounts of methane – a greenhouse gas more potent than carbon dioxide – as global temperatures rise. Now, however, a climate scientist at the State Hydrological Institute in Russia is saying that these concerns may be overestimated. Oleg Anisimov has calculated that, in the next 50 years, sustained thawing of Russian permafrost will increase the overall content of methane in the atmosphere by just 0.04 ppm and lead to a relatively low global temperature rise of 0.012°C.

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