INFLUENCE OF THE LARGE-SCALE ATMOSPHERIC CIRCULATION ON METEOROLOGICAL REGIME OF THE GLACIAL ZONE OF KODAR RANGE DURING THE ABLATION
O.P. OSIPOVA1, E.Yu. OSIPOV2
1V.B. Sochava Institute of Geography, Siberian Branch, Russian Academy of Sciences, 664033, Irkutsk, ul. Ulan-Batorskaya, 1, Russia
olga@irigs.irk.ru
2Limnological Institute, Siberian Branch, Russian Academy of Sciences, 664033, Irkutsk, ul. Ulan-Batorskaya, 3, Russia
eduard@lin.irk.ru
Keywords: glaciers, meteorological regime, atmospheric circulation, blocking processes, anomalies of meteoparameters
Abstract
Presented are the results from analyzing large-scale atmospheric processes (using NCEP/NCAR reanalysis data) and me teorological characteristics measured in the glacial zone of Kodar Range during the ablation period of June-August 2019. It was established that the meteorological regime of the glacial emerged developed at the background of a clearly pronounced positive anomaly of the geopotential height in the lower troposphere (700 and 500 hPa) over the territory of Eastern Siberia. Quasi-cyclic fluctuations of air temperature and wind velocity as revealed on the glacier (with a period of 12-13 days) are well cor related with the wave pattern of the passage of the ridges and troughs over the study area. It is determined that the high ablation rates were associated with anticyclones and blocking ridges of subtropical origin, and the low rates - with cyclones and low-gradient pressure fields.
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