Variability of the circulation processes in the Lower Volga Region on the background of global climate trends

Abstract

In this article we consider variability of the character of atmospheric circulation during different periods of climatic variability in the Lower Volga region as part of the Atlantic-Eurasian hemisphere sector. Variability of the circulation regime is analyzed with the involvement of the regional typification of synoptic processes by V. L. Arkhangelsky - E. A. Polyanskaya. It is shown that during the phase of the second wave of global warming compared to the period of stabilization in the South-East of the Russian Plain we actually see the decrease of the polarfront cyclones occurrence frequency, the increase of cyclones frequency on the Arctic front and the intrusion of Arctic anticyclones. The revealed character of synoptic processes changes is reflected in the reconstructions of geopotential fields at the middle level of the troposphere. The climatically meaningful conclusion was also made about the stabilizing role of the atmospheric circulation and the formation of the specific features of the climatic variability that does not have analogues in the period of regular meteorological observations.