Spatio-Temporal Analysis of the Climatic Conditions of Dispersive Factors in the Central Part of the Russian Plain

Abstract

The purpose is to study the spatial and temporal characteristics of the main factors determining the disper sion of impurities in the atmosphere in the territory of the central part of the Russian Plain. The materials and methods of the research are based on the geoinformation analysis of temperature-wind sounding data from aerological stations located in the central part of the Russian Plain. Results and discussion. Spatial-temporal patterns for the distribution of weak (stile) winds (0-1 m/s), as well as ground and elevated inversions during cold and warm periods and throughout the year, have been established. Conclusions. The dominant role of atmospheric circulation in the spatio-temporal patterns of distribution of the main factors of pollution dispersion in the atmosphere, as well as the signifi cant importance of physical and geographical factors of the territory, has been proven. During the year, in the west of the central part of the Russian Plain, the probability of ground inversion formation varies within 30-35 % and is due to the radiation cooling of the underlying surface. In the east of the central part of the Russian Plain, the probability of ground inversion reaches 40-45 % due to the infl uence of the Siberian anticyclone in winter. The predominance of the stable state of the atmosphere, with frequent inversions, is observed in winter.