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SPATIAL VARIABILITY OF SOIL TEMPERATURE AND ACTIVE-LAYER THICKNESS IN THE PERMAFROST REGIONS OF RUSSIA DURING THE LAST FIFTY YEARS
Session: Permafrost Degradation II / Dégradation du pergélisol II
Artem Sherstiukov, All-Russian Research Institute of Hydrometeorological Information - World Data Center (Russia)
Dmitry Streletskiy, The George Washington University (United States)
GTN-P CALM and soil temperature data collected by the Russian Weather Stations network were used to estimate spatial and temporal trends in ALT and soil temperature in the permafrost regions of Russia. Analysis of soil temperature at 3.2 m depth show an increasing trend over the last fifty years, with the most significant changes found in the north of West Siberia and the northern part of the East European Plain (0.02-0.04oC/y), and in the Central Siberian Plateau (0.04-0.05oC/y). Most locations experience 1-3 cm/y increase in ALT over the same period, although in some regions, such as southwest Yakutia, ALT decreased significantly. The last fifteen years (chosen to correspond with the majority of observations at the Russian CALM sites) are characterized by considerably higher rates of change, as compared to 1963-2013.
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