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17 October 2023 Study of formation of the Crimean bora on background of general atmospheric circulation
S. I. Kazakov, V. V. Metik-Diyunova, S. A. Mayboroda, A. S. Boguslavsky
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Proceedings Volume 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 1278054 (2023) https://doi.org/10.1117/12.2689359
Event: XXIX International Symposium "Atmospheric and Ocean Optics, Atmospheric Physics", 2023, Moscow, Russian Federation
Abstract
Based on the data of standard hydrometeorological measurements of wind speed and direction, the temporal characteristics of Bora phenomena on the southern coast of Crimea for the period from 1990 to 2022 were estimated. Average annual, average monthly values of the number of days with Bora for the study period and the frequency of Bora by months were obtained. To analyze the synoptic conditions for the formation and frequency of the Crimean Bora, the ERA5 reanalysis data on wind speed and geopotential at a level of 500 hPa in the Northern Hemisphere were used. The conditions for the formation of Bora against the background of the general circulation of the atmosphere were assessed using the typification of B.L. Dzerdzeevsky. For all cases of Bora, various types of atmospheric circulation mechanisms have been studied. It is shown that the development of the Crimean southern coast Bora can occur in various forms of large-scale circulation with the participation of two main types – meridional northern and meridional southern. The local features of the mountain relief directly determine the spatial variability of the wind field during Bora.
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S. I. Kazakov, V. V. Metik-Diyunova, S. A. Mayboroda, and A. S. Boguslavsky "Study of formation of the Crimean bora on background of general atmospheric circulation", Proc. SPIE 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 1278054 (17 October 2023); https://doi.org/10.1117/12.2689359
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KEYWORDS
Wind speed
Air temperature
Atmospheric sciences
Oceanography
Surface air temperature
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