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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. 7, pp. 167-177

Properties of eddies near Svalbard and in Fram Strait from spaceborne SAR observations in summer

L.A. Petrenko 1 , I.E. Kozlov 1, 2 
1 Marine Hydrophysical Institute RAS, Sevastopol, Russia
2 Russian State Hydrometeorological University, Saint-Petersburg, Russia
Accepted: 18.09.2020
DOI: 10.21046/2070-7401-2020-17-7-167-177
Based on the analysis of spaceborne Envisat ASAR images in July – September 2007 surface signatures of open ocean eddies near Svalbard and in Fram Strait were identified. This allowed to identify about 3000 of eddy signatures, reveal the key regions of eddy formation, calculate their spatial probability, diameters and vorticity sign. As shown, most frequently eddies were observed in many fjords of Svalbard, to the west and northwest of it, in Stur-Fjord Strait, near Bear Island, and along the marginal ice zone in the Greenland Sea and Fram Strait. The cyclonic eddies clearly prevailed in the record, and most of them were found over the depth regions not exceeding 400 m. Eddy diameters varied from 0.5 to 65 km. Eddies with diameters of more than 10 km were found over deep regions, while those of 3–7 km dominated over the shelf. The spatial distribution of eddies clearly traces the main currents in the study region. Comparison of eddy sizes with the climatic values of the Rossby deformation radius in summer suggests that most of observed eddies belong to submesoscales.
Keywords: submesoscale eddies, Svalbard archipelago, Fram Strait, spaceborne SAR images, Arctic Ocean
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