Organic aerosol in air of Siberia and the Arctic. Part 2. Vertical distribution
M.Yu. Arshinov1, B.D. Belan1, S.B. Belan1, N.G. Voronetskaya2, A.K. Golovko2, D.K. Davydov1, G.A. Ivlev1, A.S. Kozlov3, S.B. Malyshkin3, G.S. Pevneva2, D.V. Simonenkov1, A.V. Fofonov1
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2Institute of Petroleum Chemistry of the Siberian Branch of the RAS, 3, Academichesky ave., Tomsk, 634021, Russia
3V.V. Voevodsky Institute of Chemical Kinetics and Combustion of the Siberian Branch of the RAS, 3 Institutskaya str., 3, 630090, Novosibirsk, Russia
Keywords: атмосферный аэрозоль, состав, углеводороды, atmospheric aerosol, composition, hydrocarbons
Abstract
The vertical distribution of the organic component of aerosol in the boundary air layer and free atmosphere was studied on the basis of sampling from a board of Tu-134 “Optic” airborne-laboratory. The altitude range was divided into two layers: 0.5-2.0 and 3.0-7.0 km. It is shown that the aerosol organic component concentration exponentially decreases with altitude. The drop of the concentration makes 7.5 times from the surface air layer to the free troposphere. The maximal concentration in the surface air layer is observed for n-C19H40; in the boundary layer and free atmosphere, for n-C17H34. In the free troposphere, compounds heavier than n-C22H46 are fixed only at the trace concentration level. Redistribution of the organic component of aerosol between the surface and boundary air layers occurs during the year.
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