Features of the spatial distribution of atmospheric aerosol in the Eurasian sector of the Arctic Ocean
S.M. Sakerin, D.M. Kabanov, I.A. Kruglinsky, V.V. Pol’kin, A.O. Pochufarov
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: Arctic, sea expeditions, aerosol concentrations, aerosol optical depth, spatial distribution
Abstract
The volume concentration of fine and coarse aerosol ( Vf and Vс ) in the near-water layer and the aerosol optical depth (AOD) of the atmosphere are generalized on the basis of long-term studies in Eurasian sector of the Arctic ocean. The mean AOD value at 0.5 mm is 0.061, the Angstrom exponent is 0.9, the concentrations of fine and coarse aerosol are 0.35 and 2.5 μm3/cm3, respectively. The greatest content of fine aerosol is observed in the atmosphere over Norwegian and Barents Seas. The spatial distribution is characterized by the decrease in the concentrations in northern and eastern directions: the mean value Vf becomes 1.7 times less from Barents Sea to Chukchi Sea (from 0,43 to 0.26 μm3/cm3). The very high concentration of coarse aerosol are observed in south-east part of Kara Sea: the mean Vс is 4.18 μm3/cm3. Then the coarse aerosol concentration decreases relatively to Kara Sea in eastern and western directions by several times.
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