Influence of air movement structure on the microphysical properties of the atmosphere over Listvyanka
M.Yu. Shikhovtsev1, A.Yu. Shikhovtsev2, P.G. Kovadlo2, V.A. Obolkin1, Ye.V. Molozhnikova1
1Limnological Institute of the Siberian Branch of the RAS, Irkutsk, Russia
2Institute of Solar-Terrestrial Physics of the Siberian Branch of the RAS, Irkutsk, Russia
Keywords: atmosphere, atmospheric aerosol, turbulence, kinetic energy of turbulence, Southern Baikal region
Abstract
At present, the relationship between sulfur dioxide (SO2) concentration and small-scale turbulence within Southern Baikal has been described in a limited volume. The paper presents the results of a study of jet streams and atmospheric turbulence affecting the surface SO2 content over Listvyanka station. The cases are considered when the surface SO2 concentration tends to increase at negative vertical turbulent specific heat fluxes. This occurs against the background of the formation of jet streams within the lower layer of the atmosphere and large vertical shears of the wind speed below the jet formation height. The vertical turbulent specific heat flux in the surface layer of the atmosphere can serve as a key indicator determining the possibility of a positive relationship between the surface SO2 concentration and the total kinetic energy of turbulence. The analysis revealed that the SO2 concentration tends to increase at negative vertical turbulent temperature fluxes against the background of the development of low-level jet streams. In similar situations, but with positive or close to zero temperature flux values, SO2 concentrations usually remain at background levels.
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