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Arctic heat waves and thawing permafrost worsen climate threat

Arctic heat waves and thawing permafrost worsen climate threat
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The Warming Arctic: How Thawing Permafrost Challenges Environmental Governance

Posted April 23, 2021
Permafrost, or continuously frozen ground, covers about 24 percent of the Northern Hemisphere, including 50 percent of Canada, more than 60 percent of Russia, and almost 85 percent of Alaska. Scientific understanding and modelling of long-term permafrost dynamics are still at the development stage [1, 2] but the effects of thawing permafrost on Arctic coastline erosion and infrastructure collapse are already causing concerns.
Ice under permafrost soil. Photo: SeppFriedhuber/Getty Images
Global warming and Arctic permafrost thaw
Permafrost is a substantial sink of CO2 and methane, making it significant to the global climate, and release of these greenhouse gases from thawing permafrost is predicted to be similar in magnitude to that caused by land-use change [3]. Further effects of permafrost warming in the Arctic include increased flooding, precipitation, and coastline erosion, already occurring in some regions [2, 4]. ....

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Richard Littlemore: Permafrost carbon feedback could be the disaster that saves us all

Richard Littlemore: Permafrost carbon feedback could be the disaster that saves us all
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