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A Global Study on Permafrost Warming
January 28, 2019
 
 
photo
Photo: Samuel Gagnon

Mesuring station, Narsajuaq, Nunavik

A new comparative study, conducted by the international GTN-P permafrost network, including CEN researcher Michel Allard, shows that mean ground temperature has increased in all permafrost regions except sites in the eastern Canadian Arctic. This new study compiles time series of global permafrost temperature data measured since the International Polar Year (2007-2009) at depths of about 10-15 m to assess temperature changes in these environments. Between 2007 and 2016, permafrost temperatures increased by an average of 0.29 ± 0.12°C overall. These results are consistent with the trend of rising air temperatures in the Arctic. In contrast, in the discontinuous permafrost zone, the observed ground warming appears to be mainly caused by increased snow depth rather than rising air temperatures.


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