| Article |
|---|
| Article name |
DYNAMICS OF THE ASIAN ANTI-CYCLE AND ITS INFLUENCE ON CLIMATE AND ECOLOGY OF THE BAIKAL REGION |
| Authors |
Vologzhina S.. candidate of geographical sciences, svologzhina@gmail.com Latysheva I.. candidate of geographical sciences, ababab1967@mail.ru |
| Bibliographic description |
|
| Category |
Earth science |
| DOI |
551.515.1(571.5) |
| DOI |
10.21209/2227-9245-2019-25-3-4-11 |
| Article type |
scientific |
| Annotation |
The article is devoted to the study of the characteristics and dynamics of the Asian anticyclone, the winter continental center of the atmosphere, which, along with the cyclone yields, largely determines the weather, climatic and environmental conditions in the Baikal region and Transbaikalia during the cold season. According to the NCEP / NCAR Analysis, a comparative statistical analysis of the characteristics of the Asian anticyclone with the winter continental center of the atmosphere operating in Canada is carried out. The tendency of weakening of the Asian and Canadian anticyclones against the background of global and regional average temperatures growth is revealed. New meteorological parameters for the Asian anticyclone were obtained for the first time from the output data of the GFS model, which indicate the prevailing influence of meteorological factors of atmospheric air pollution. Circulation factors of the Asian anticyclone weakening at the beginning of the XXI century are analyzed in comparison with the long-term data for 1948–1999. As indicators of large-scale changes in the circulation processes, the prevailing wind currents at the height of the isobaric surface of 500 hPa (5 km) were considered, in the direction of which advection of ascending warm air masses along the front parts of high-altitude troughs and downflows of cold air oriented along the rear parts of the macro-walls is carried out. It is revealed that the weakening of the Asian anticyclone in recent decades is associated with an increase in the contribution of advection of warm air masses, involved in the anticyclone from the south, which in turn is possibly due to the displacement of the trough axes and crests of large-scale waves in the middle and upper troposphere. The weakening of the Asian anticyclone is accompanied by an increase in the frequency of positive anomalies in winter temperatures in the Baikal and Transbaikal areas, which in 2000–2016 reached record values for the entire period of instrumental meteorological observations |
| Key words |
Key words: centers of action of the atmosphere; Asian anticyclone; Canadian anticyclone; Baikal region; climate; ecology; circulation; temperature anomalies; anticyclone dynamics; climatic indices |
| Article information |
Vologzhina S., Latysheva I. The dynamics of the Asian anti-cycle and its influence on climate and ecology of the Baikal region // Transbaikal State University Journal, 2019, vol. 25, no. 3, pp.4-11 |
| References |
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