Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2022, Vol. 19, No. 5, pp. 222-234
Topographic waves in the Kuril region
V.S. Travkin
1 , T.V. Belonenko
1 , A.V. Kochnev
2 1 Saint Petersburg State University, Saint Petersburg, Russia
2 Northern (Arctic) Federal University named after M.V. Lomonosov, Arkhangelsk, Russia
Accepted: 30.08.2022
DOI: 10.21046/2070-7401-2022-19-5-222-234
The paper analyzes various types of topographic waves in the Kuril region. The following topographic structures are considered: shelf, deep-water trench, and topographic elevation eastward of the trench. It is shown that waves on topographic slopes manifest themselves in the form of regular movement of mesoscale vortices. Anticyclones move to the southwest in the form of shelf waves along the shelf area, as well as in the form of trench waves spreading to the northeast on the sea side of the Kuril trench. On the inner side of the trench and the slope of the topographic elevation behind the trench, topographic waves appear mainly in the form of cyclones moving southwest. Comparison with different factors affecting the propagation of low-frequency waves showed that the contribution of topography is dominant, several orders of magnitude higher than the contribution of the β-effect and shear flow. Topographic waves have a barotropic component, manifested in the orderly movement of vortices along isobaths located at depths of more than 5000 m.
Keywords: Kuril region, Kuril trench, topographic waves, shelf waves, trench waves, mesoscale vortices
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