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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2021, Vol. 18, No. 4, pp. 195-207

Black Sea upwellings

R.R. Stanichnaya 1 , S.V. Stanichny 1 
1 Marine Hydrophysical Institute RAS, Sevastopol, Russia
Accepted: 01.07.2021
DOI: 10.21046/2070-7401-2021-18-4-195-207
The paper considers the statistical characteristics of manifestation of coastal upwellings in the Black Sea based on the analysis of satellite data on the sea surface temperature for the period from 1997 to 2011, for the South Coast of Crimea to 2015. Areas with the most frequent upwellings during the extended summer period from May 15 to September 15 are identified. A significant interannual variability in the number of upwellings is shown, as well as a quasi-biennial periodicity. For a number of selected areas, spatial features of upwelling manifestations were considered and quantitative parameters were estimated — alongshore length of upwelling, occupied area on the sea surface, temperature difference between upwelling waters and undisturbed surrounding waters. It is known that the main reason for the occurrence of coastal upwelling is an increase in the favorable alongshore component of the wind speed. In the Black Sea this occurs if the coast is to the left of the favorable alongshore component of the wind speed direction. A joint analysis of maps of chlorophyll concentration and surface temperature failed to reveal unambiguous relationship between these parameters. Situations were observed both with an increase in chlorophyll concentration in the upwelling zone and with a decrease.
Keywords: upwelling, remote sensing, Black Sea, alongshore wind, sea surface, geostrophic component, deep waters
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