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ON CLIMATE ATMOSPHERIC PARAMETERS AND SURFACE ALBEDO IN THE RUSSIAN ARCTIC IN APRIL

We study four test areas near the Arctic Russian coast of Eurasia in April 2010–2016. The near surface air temperature was studied in relation to values of 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 systems of satellite information and measured values reanalysis – 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 their influence on the air surface temperature. The amendments in albedo radiative effect were estimated for different areas of the Russian Arctic in April. Variations in albedo ranged from 3.5 % near NL region to 15 % near NAO one. Absolute values of radiation forcing due to these surface albedo variations are from 4 W/m2 to 21 W/m2 , respectively. At the same time, the area of NAO differs little from others in terms of the amount of incident solar radiation and its variations. The interpretation of obtained dependencies and correlations in terms of physical mechanisms or certain connections is a very complicated issue and requires additional research.