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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, 2022, Vol. 19, No. 3, pp. 270-278

Features of surface manifestations of small eddies in the Bering Sea in the summer season based on satellite radar images

O.A. Atadzhanova 1, 2 , A.V. Zimin 1, 3 , K.A. Kruglova 4 
1 Shirshov Institute of Oceanology RAS, Moscow, Russia
2 Marine Hydrophysical Institute RAS, Sevastopol, Russia
3 Saint Petersburg State University, Saint Petersburg, Russia
4 Russian State Hydrometeorological University, Saint Petersburg, Russia
Accepted: 09.06.2022
DOI: 10.21046/2070-7401-2022-19-3-270-278
The work presents the results of observations of small (submesoscale) eddy structures in the Bering Sea. These results were obtained by processing radar images from Sentinel 1A/B satellites, for the period from June to August 2020. Analysis of 704 images made it possible to identify 1018 cases of surface manifestations of eddies. Manifestations of various forms were detected: single, mushroom-like currents (eddy dipoles), eddy chains. On the basis of statistical analysis, the areas of their frequent occurrence were identified and the geometric characteristics of the identified structures, as well as the features of their manifestations, were assessed. Most of the eddies were detected in the northern shallow part of the sea. It was established that in the vast majority of cases eddies of cyclonic type of rotation were recorded. It was shown that the seasonally average structure diameter was the same for cyclonic and anticyclonic eddies and amounted to 2.5 km, which corresponds to the summer season average estimates of the Rossby baroclinic radius for the shallow water area. More than 85 % of the cases of eddy observations occurred in August, and the smallest (less than 5 %) number occurred in June. It has been established that at wind speeds of 4 m/s and more, eddy structures in the Bering Sea are recorded extremely rarely.
Keywords: submesoscale, radar images, small eddies, Bering Sea, Sentinel 1, Bering Strait
Full text

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