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Arctic Permafrost Is Melting so Fast, It's Gouging Holes in the Landscape

Current estimates of carbon emissions from melting Arctic permafrost rely on a model of a gradual melt. New research has found abrupt thawing of permafrost which means carbon emissions estimates should be doubled. The rate at which permafrost is thawing in the Arctic is gouging holes in the landscape, according to a new study published in the journal Nature Geoscience. The UN's Intergovernmental Panel on Climate Change has not considered the phenomenon of thermokarst — the degraded land ravaged by an abrupt thaw. When the permafrost that supports the soil disappears, then hillsides collapse and enormous sinkholes suddenly appear, as Wired reported. The effect runs through meters of permafrost and takes a matter of months or a few years. That upends the traditional models of permafrost thawing, which look at a few centimeters of permafrost melt over several decades. The rapid change to the permafrost shocks the landscape, causing an enormous release of carbon.  Read more....

 

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