We study four test areas near the Arctic Russian coast of Eurasia in April 2010-2016. The near surface air temperature was studied in dependence of variations in solar incident radiation, surface albedo, column content of black carbon in the atmosphere, and the amount of solid and liquid precipitation. The data from two reanalysis systems of satellite information and measured values – MERRA-2 and WATCH – are used. We also study variability in daily averaged values of those parameters in a monthly scale (trends), as well in day-to-day scale by the method of multiple linear regression in relation to air temperature The shifts of albedo radiative effect were estimated for different areas of the Russian Arctic in April.
Snow Water Equivalent (SWE) in Western Siberia during 1979 to 2013 period was simulated using Land-Surface Model (LSM) SPONSOR forced with meteodata from the ECMWF ERA-Interim reanalysis. Fields of SWE with high spatial and temporal resolution were obtained. Maps of February average SWE were computed for satellite data, reanalysis and SPONSOR model simulations. A comparison between the SWE maps shows a significant uncertainty. It is shown, that none of the methods cannot be currently used as a reference for determining SWE when there is no data of ground-based observations. Simulations using LSM SPONSOR reasonably well reproduce SWE for Central, Eastern and, most probably, the Northern parts of the region.
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