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Atmospheric and Oceanic Optics

2021 year, number 11

Differences in air composition between troposphere and stratosphere near tropopause

P.N. Antokhin1, V.G. Arshinova1, M.Yu. Arshinov1, B.D. Belan1, S.B. Belan1, L.P. Golobokova2, D.K. Davydov1, G.A. Ivlev1, A.V. Kozlov1, A.S. Kozlov3, V.I. Otmahov4, T.M. Rasskazchikova1, D.V. Simonenkov1, G.N. Tolmachev1, A.V. Fofonov1
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
2Limnological Institute of the Siberian Branch of the RAS, Irkutsk, Russia
3V.V. Voevodsky Institute of Chemical Kinetics and Combustion of the Siberian Branch of the RAS, Novosibirsk, Russia
4National Research Tomsk State University, Tomsk, Russia
Keywords: atmosphere, aerosol, air, vertical distribution, gases, composition, stratosphere, troposphere


A change in the air composition during the transition from the troposphere to the stratosphere is investigated on the basis of aircraft sounding data. Distribution of eight gases, dispersion and chemical composition of aerosol is analyzed. It is shown that at the intersection of the tropopause, the concentrations of N2O, CO, and CH4 sharply decrease, while of O3 and NO2 and the counting concentration of aerosol, on the contrary, increase. In the elemental composition, Si dominates the tropopause; in the ion, SO42-. Terrigenous elements Al, Cu, and Fe are dominated in the troposphere; and among ions, a set of several compounds varies with region. Noticeably different particle dispersions are also identified.