Vol. 37, issue 09, article # 7

Abstract:

The volume concentration of fine and coarse aerosol (V_f and V_с) 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 mm³/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 V_f becomes 1.7 times less from Barents Sea to Chukchi Sea (from 0,43 to 0.26 mm³/cm³). The very high concentration of coarse aerosol are observed in south-east part of Kara Sea: the mean V_с is 4.18 mm³/cm³. Then the coarse aerosol concentration decreases relatively to Kara Sea in eastern and western directions by several times.

Keywords:

Arctic, sea expeditions, aerosol concentrations, aerosol optical depth, spatial distribution

Figures:

References:

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