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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. 2, pp. 201-211

Characteristics of short-period internal waves in the Southern Ocean inferred from Sentinel 1A/B SAR satellite data

Ya.I. Bakueva 1 , I.E. Kozlov 1 
1 Marine Hydrophysical Institute RAS, Sevastopol, Russia
Accepted: 18.04.2022
DOI: 10.21046/2070-7401-2022-19-2-201-211
This paper presents the results of observations of short-period internal waves (SIWs) over ice-free areas of the Southern Ocean. The study was conducted in the Indian and Atlantic sectors, namely in the Drake Passage and the Scotia, Weddell, Riser-Larsen, Lazarev, Cosmonauts, and Commonwealth Seas using Sentinel 1A/B satellite data for February 2020. Form the analysis of surface manifestations of SIWs in SAR images we determined by the areas of their generation and space-time characteristics, such as crest length of the leading wave and packet width. In total, 1037 radar images were analyzed and 6888 surface manifestations of SIWs were identified. Key areas of SIWs activity defined by their maximum probability were recorded in the Drake Passage, above the continental slope to the northeast of the Antarctic Peninsula in the Scotia Sea, and also above the shelf slope in the Commonwealth Sea. Internal waves were observed as packets of 4–5 solitary waves with a leading wave crest length of about 15–30 km, an average packet width of about 15 km (most values are within 10–25 km), and a characteristic decrease in the distance between them towards the rear of the packet; single solitons were rarely recorded.
Keywords: short-period internal waves, satellite radar sea surface, Southern Ocean, Drake Passage, Scotch Sea, Weddell Sea, Lazarev Sea, Riiser-Larsen Sea, Commonwealth Sea, Cosmonauts Sea
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