On the relation of space radiation with total contents of ozone and climatic parameters over South Coast of Crimea

Kazakov, Sergey I.; Lemeshko, E. M.; Mayboroda, Sergey; Metik-Diyunova, Vitalia; Simonova, Yulia; Boguslavsky, Alexander

doi:10.1117/12.2540623

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“…The Crimean South Coast Bora is observed on the downwind slopes of the Southern Coast of Crimea (SCC) in the form of a stormy gusty cold wind with speeds of 15-20 m/s with gusts of up to 40-60 m/s, and with a simultaneous sharp drop in air temperature near the sea by 10-15ºС. 3 Although the action of Bora is localized within a narrow coastal strip, its occurrence and development is directly related to large-scale atmospheric formations. As already noted, the synoptic background during the appearance of Bora is the area of high pressure in the territory from the Scandinavian Peninsula to the Balkans, and the area of low pressure from the northern Urals to the lower reaches of Volga river.…”

Section: Introductionmentioning

confidence: 99%

Study of formation of the Crimean bora on background of general atmospheric circulation

Kazakov,

Metik-Diyunova,

Mayboroda

et al. 2023

29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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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 typesmeridional 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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Section: Introductionmentioning

confidence: 99%