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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, 2025, V. 22, No. 6, pp. 298-311

Using satellite altimetry to study mesoscale eddies and coastal wave processes near the Kamchatka coast

S.P. Khudyakova 1, 2 , T.V. Belonenko 1 , A.V. Kochnev 3 
1 Saint Petersburg State University, Saint Petersburg, Russia
2 V.I. Il'ichev Pacific Oceanological Institute FEB RAS, Vladivostok, Russia
3 Northern (Arctic) Federal University, Arkhangelsk, Russia
Accepted: 09.10.2025
DOI: 10.21046/2070-7401-2025-22-6-298-311
The study examines the role of mesoscale eddies in shaping the coastal dynamics off the eastern coast of Kamchatka, with particular focus on the Kamchatka Strait region where eddy activity is most intense. It is shown that anticyclonic and cyclonic structures form in different zones of the East Kamchatka Current, exhibiting spatial asymmetry: anticyclones are located closer to the coast, while cyclones form near the continental slope edge. Analysis of satellite and model data (META3.2 and GLORYS12V1) reveals that mesoscale eddies play a key role in the seasonal and interannual modulation of volume, heat, and salt transport, primarily supporting the southward export of water from the Bering Sea to the northwestern Pacific. Considering that theoretical studies indicate the ability of mesoscale eddies to initiate low-frequency disturbances, including shelf and internal Kelvin waves, the obtained estimates of their spatial and temporal characteristics in the Kamchatka Strait region — radii of about 70–80 km and drift speeds of 10–13 cm/s — suggest that these structures may act as potential generators of coastal and planetary waves with comparable scales. Thus, the results highlight the significance of mesoscale eddies not only as active participants in water exchange but also as sensitive indicators of large-scale oceanic dynamics, offering a valuable tool for diagnosing low-frequency variability in physically complex and poorly studied coastal regions.
Keywords: satellite data, altimetry, mesoscale eddies, Kamchatka Strait, planetary waves, Kelvin waves, shelf waves, vortex dynamics, META3.2, GLORYS12V1
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