The main precipitation modes over Mongolia and southern part of Eastern Siberia in July
O.Yu. Antokhina1, P.N. Antokhin1, E.V. Devyatova2, Yu.V. Martynova3,4, V.I. Mordvinov2,5
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2Institute of Solar-Terrestrial Physics of the Siberian Branch of the RAS, 664033, Irkutsk, 126a, Lermontova street
3Institute of Monitoring of Climatic and Ecological Systems of the Siberian Branch of the Russian Academy of Sciences, 634055, Tomsk, 10/3, Academichesky ave
4Siberian Regional Hydrometeorological Research Institute, Novosibirsk, Russia, Russia, 630099, Novosibirsk, Sovetskaya, 30
5Irkutsk State University, 664003, Irkutsk, 1, Karl Marx Str
Keywords: атмосферные осадки, дипольные моды, оз. Байкал, р. Селенга, естественные ортогональные функции, precipitation, seesaw modes, Lake Baikal, the Selenga River, empirical orthogonal functions
Abstract
We investigated the main precipitation modes over Mongolia and southern part of Eastern Siberia in midsummer. We used precipitation data from GPCC archive (1979-2013). The EOF analysis was applied to the interannual change in July precipitation for two areas: “big” (90-120°E; 35-70°N) and “small” (the Selenga basin, 96-110°E; 46-54°N). The total amount of precipitation within the Selenga basin in July was calculated. According to the obtained estimates two leading EOFs (EOF1 + EOF2) explains 32.3 and 48.9% of the total variance for the big and small areas, respectively.
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