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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, 2016, Vol. 13, No. 6, pp. 99-109

Spaceborne SAR observations of short-period internal waves in the Laptev Sea

E.V. Zubkova 1 , I.E. Kozlov 1, 2 , V.N. Kudryavtsev 1, 2 
1 Russian State Hydrometeorological University , Saint-Petersburg , Russia
2 Marine Hydrophysical Institute RAS, Sevastopol, Russia
Accepted: 04.10.2016
DOI: 10.21046/2070-7401-2016-13-6-99-109
In this paper we present results of short-period internal wave (SIW) observations in the Laptev Sea based on analysis of spaceborne Envisat ASAR data acquired between May–October 2011. Analysis of 354 SAR images helped to identify 91 distinct internal wave signatures, reveal key regions of their occurrence and build spatial maps of main SIW characteristics. It is shown that key regions of SIW observations are found over the continental slope regions east to Maly Taymyr Island and north-west to Kotelny Island, east to Bolshoy Begichev Island close to the Gulf of Khatanga, and north–west to the Arctic Cape. About 70% of all SIW observations correspond to the outer shelf of the Laptev Sea, while the maximum number of SIW occurrence is located in the vicinity of the Gulf of Khatanga. The largest SIW packets were registered to the west of Belkovsky and Stolbovoy islands, as well as to the east of Maly Taymyr Island. It is shown that regions of regular SIW observations coincide with the Laptev Sea polynya system, where internal tidal waves are known to be one of the mechanisms responsible for polynya formation.
Keywords: short-period internal waves, SAR imaging, Laptev Sea
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