Hot summers causing Arctic sinkholes: study

Researchers found maximum thaw depths had already exceeded what they had expected to occur by 2090, according to the report published in Geophysical Research Letters journal.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.Between 2004 and 2015, the scientists observed thermokarsts at three sites along a 700 kilometer (435 mile) stretch in the Canadian High Arctic. Thermokast is a term for a type of land surface that occurs when ice melts in permafrost, creating small sinkhole-like pits and valleys as the ground settles unevenly. A study in May found thatRead More – Source

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