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«IZVESTIYA IRKUTSKOGO GOSUDARSTVENNOGO UNIVERSITETA». SERIYA «NAUKI O ZEMLE»
«THE BULLETIN OF IRKUTSK STATE UNIVERSITY». SERIES «EARTH SCIENCES»
ISSN 2073-3402 (Print)

List of issues > Series «Earth Sciences». 2024. Vol 48

Synoptic Conditions for Rising River Levels in the South of the Irkutsk Region and Transbaikalia in July 2023

Author(s)
I. V. Latysheva, V. N. Sinyukovich, K. A. Loshchenko, V. L. Makukhin
Abstract
The article discusses natural and anthropogenic factors of rising river levels and associated environmental consequences, existing probabilistic estimates of the amount of floods using various hydrological and climate models. Orographic, climatic and circulation features of the occurrence of floods in the Irkutsk region are identified. A study was carried out of the circulation and weather factors of increasing the intensity and duration of precipitation in early July 2023, which was accompanied by an increase in river levels in the south of the Irkutsk region and the Baikal region. The dynamics of atmospheric processes near the Earth's surface and at the levels of isobaric surfaces AT850 hPa, AT-700 hPa, AT-500 hPa and AT-300 hPa, reflecting the conditions of surface and highaltitude cyclo- and frontogenesis, are analyzed. The contribution of advective flows of heat and moisture, mesojets in the middle troposphere and upper tropospheric jet currents in increasing the amount and duration of atmospheric precipitation is highlighted. A significant contribution to the increase in precipitation and the rise in river levels was made by moist air masses moving in the lower troposphere from the water area of the lake. Baikal, in the middle troposphere from the Yellow Sea. The time of passage of the flood and the height of the rise in the level of individual watercourses as a result of the rains were estimated.
About the Authors

Latysheva Inna Valentinovna, Candidate of Sciences (Geography), Associate Professor, Head, Department of Meteorology and Physics of Near-Earth Space, Irkutsk State University, 1, K. Marx st., Irkutsk, 664003, Russian Federation, e-mail: ababab1967@mail.ru

Sinyukovich Valery Nikolaevich, Candidate of Sciences (Geography), Senior Researcher, Laboratory of Hydrology and Hydrophysics, Limnological Institute SB RAS, 3, Ulan-Batorskaya st., Irkutsk, 664033, Russian Federation, e-mail: sin@lin.irk.ru

Loshchenko Kristina Anatolievna, Candidate of Sciences (Geography), Associate Professor of the Department of Meteorology and Physics of Near-Earth Space, Irkutsk State University, 1, K. Marx st., Irkutsk, 664003, Russian Federation, e-mail: loshchenko@bk.ru

Makukhin Vladimir Leonidovich, Candidate of Sciences (Techics), Junior Researcher, Laboratory of Hydrochemistry and Atmospheric Chemistry, Limnological Institute SB RAS, 3, Ulan-Batorskaya st., Irkutsk, 664033, Russian Federation, Associate Professor of the Department of Meteorology and Physics of Near-Earth Space, Irkutsk State University, 1, K. Marx st., Irkutsk, 664003, Russian Federation, e-mail: aerosol@lin.irk.ru

For citation

Latysheva I.V., Sinyukovich V.N., Loshchenko K.A., Makukhin V.L. Synoptic Conditions for Rising River Levels in the South of the Irkutsk Region and Transbaikalia in July 2023. The Bulletin of Irkutsk State University. Series Earth Sciences, 2024, vol. 48, pp. 41-56. https://doi.org/10.26516/2073-3402.2024.48.41 (in Russian)

Keywords
floods, heavy precipitation, circulation, troposphere, geopotential, cyclones, highaltitude frontal zone.
UDC
551.583 (571.53/.55)
DOI
https://doi.org/10.26516/2073-3402.2024.48.41
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