At one site, Mould Bay, the level of thawing was 240% higher than historic norms.
Between 2003 and 2016, the scientists found there had been between 150% and 240% more thawing of permafrost on average in the Canadian High Arctic, compared with the period between 1979 and 2000.
Scientists blamed a series of warm summers for damaging the “very cold permafrost,” noting that there was little soil or vegetation to buffer the permafrost from the temperature changes.
As permafrost melts, it releases carbon and greenhouse gases into the atmosphere. Because Arctic permafrost is now melting faster than before, higher amounts of greenhouse gases and carbon could be released. That would warm the planet up more quickly.
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