Vertical distribution of n-alkanes in atmospheric aerosol in the Russian Arctic in September 2020
V.G. Arshinova1, M.Yu. Arshinov1, B.D. Belan1, D.K. Davydov1, G.A. Ivlev1, A.V. Kozlov1, A.S. Kozlov2, T.M. Rasskazchikova1, D.V. Simonenkov1, G.N. Tolmachev1
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
2V.V. Voevodsky Institute of Chemical Kinetics and Combustion of the Siberian Branch of the RAS, Novosibirsk, Russia
Keywords: Arctic, atmosphere, aerosol, saturated hydrocarbons (n-alkanes), vertical distribution
Abstract
A combined experiment aimed at the study of the air composition over all the seas of the Russian Arctic was carried out in September 2020 with the Optik Tu-134 flying laboratory. The experiment included sampling the atmospheric aerosol in a layer of 200 to 9000 m above the sea level and determining the concentration of saturated hydrocarbons ( n -alkanes) in aerosol particles. Saturated hydrocarbon compounds С9Н20-С27Н56 were detected. The main mass of this class of organic compounds is concentrated in the narrower range С10Н22-С20Н42. The concentrations of n -alkanes in aerosol over all the seas were low (9.3-12.6 ng/m3). The only exception was the Chukchi Sea, over which the concentrations reached 37.7 ng/m3.
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