Melting Permafrost in Arctic Will Have $70tn Climate Impact – Study

Greenhouse gases, which have been frozen below the soil for centuries, have already begun to escape. Photograph: John Mcconnico/AP

CLICK HERE - STUDY - Climate policy implications of nonlinear decline of Arctic land permafrost and other cryosphere elements

Study shows how destabilised natural systems will worsen man-made problem

theguardian.com - by Jonathan Watts - April 23, 2019

The release of methane and carbon dioxide from thawing permafrost will accelerate global warming and add up to $70tn (£54tn) to the world’s climate bill, according to the most advanced study yet of the economic consequences of a melting Arctic.

If countries fail to improve on their Paris agreement commitments, this feedback mechanism, combined with a loss of heat-deflecting white ice, will cause a near 5% amplification of global warming and its associated costs, says the paper, which was published on Tuesday in Nature Communications.

The authors say their study is the first to calculate the economic impact of permafrost melt and reduced albedo – a measure of how much light that hits a surface is reflected without being absorbed – based on the most advanced computer models of what is likely to happen in the Arctic as temperatures rise. It shows how destabilised natural systems will worsen the problem caused by man-made emissions, making it more difficult and expensive to solve.

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