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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, 2020, Vol. 17, No. 1, pp. 203-210

Characteristics of ocean eddies in the Beaufort and Chukchi Seas from spaceborne radar observations

A.V. Artamonova 1 , I.E. Kozlov 1, 2 , A.V. Zimin 3 
1 Marine Hydrophysical Institute RAS, Sevastopol, Russia
2 Russian State Hydrometeorological University, Saint-Petersburg, Russia
3 Shirshov Institute of Oceanology RAS, Moscow, Russia
Accepted: 03.12.2019
DOI: 10.21046/2070-7401-2020-17-1-203-210
In this work we present the results of ocean eddies’ observations in the Chukchi and Beaufort Sea based on identification of eddy signatures in spaceborne synthetic aperture radar (SAR) images acquired in summer-autumn period of 2007 and 2011. Locations of eddy centers, their diameters, vorticity signs, manifestation types and water depths corresponding to eddy centers were determined. The results were obtained separately for eddies observed over ice-free regions and in the marginal ice zone (MIZ). Altogether 2724 eddy signatures were identified in satellite SAR images with 52% of those found in the ice-free regions and 48% in the MIZ. It is shown that about 64% of all eddies are cyclonic, which is true both for the open water and MIZ eddies. Eddies range in diameter from 1 to 50 km, while 80% of them had diameter less than 10 km. Since the values of the Rossby radius range within 1-15 km over the study site in summer, most of the observed eddies can be classified as submesoscale.
Keywords: ocean eddies, submesoscale eddies, synoptic eddies, satellite radar images, Beaufort gyre, Beaufort Sea, Chukchi Sea, Arctic Ocean
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