A team of researchers from the University of Edinburgh ran tests on Herschel Island, just off the Yukon, to observe the rate of loss of coastal permafrost in the warming Arctic.
The team used drones to map a section of the coast seven times over 40-days. What they found is that the coastal permafrost, in summer, receded at the rate of one metre every day. That's a lot of thawing, a lot of erosion.
Permafrost isn't like ice. It doesn't rebuild over the winter. When it's gone it's effectively gone for good.
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