Email this article Mean Circulation of the Japan Sea from Drifter Data and Satellite Altimetry Observations
- Authors: Zhabin I.A.1, Taranova S.N.1, Luk'yanova N.B.1
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Affiliations:
- V.I. Il'ichev Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences
- Issue: No 3 (2025)
- Pages: 72-84
- Section: ИСПОЛЬЗОВАНИЕ КОСМИЧЕСКОЙ ИНФОРМАЦИИ О ЗЕМЛЕ
- URL: https://journals.rcsi.science/0205-9614/article/view/328243
- DOI: https://doi.org/10.7868/S3034540525030063
- ID: 328243
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Abstract
Knowledge of long-term mean by highly variable currents is essential to understanding the regional climate change in the Japan Sea. Strength and location of the major currents can be identified from the subsurface drifter observation (Global Drifter Program, 1988-2023) and surface absolute geostrophic current field (AVISO satellite altimetry, 1993-2022). The well-known circulation patterns are observed, as the Tsushima Warm Current (TWC), the East-Korean Warm Current (EKWC), the Primorye (Liman) Current, Subpolar Front Current, and the northern cyclonic gyre. A detailed analysis of the surface current field showed that the EKWC in the western part of the Sea of Japan forms three anticyclonic meanders. The well pronounced eastern meander (branch) of this current is observed in the Ulleung Basin. The second meander is formed due to flow separation from the coast in the area of East Korea Bay. The third meander is observed in the northwestern part of the Sea of Japan. The Primorye Current breaks away from the coast of Primorye in the area of Peter the Great Bay and follows to the Subpolar front.. The interaction of the Primorye Current with the northwestern meander of the EKWC leads to the formation of the northwestern dynamic front. Our analyses revealed that the TWC is divided into the nearshore (coastal) branch and three branches of offshore TWC. Formation of the Subpolar Front Current in the western part of the sea is determined by the waters of the ECWT. The Primorye Current affects the northern dynamic boundary of this frontal zone. In the central and eastern parts of the Sea of Japan, the subpolar front is connected with the TWC. The northern cyclonic gyre is formed by the continuation of the TWC along the coast of Hokkaido Island, the Primorye Current and the Subpolar Front Current. The mean locations of major surface currents were explicated relative to topographic features with schematic representation of surface circulation.
About the authors
I. A. Zhabin
V.I. Il'ichev Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences
Email: zhabin@poi.dvo.ru
Vladivostok, Russia
S. N. Taranova
V.I. Il'ichev Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of SciencesVladivostok, Russia
N. B. Luk'yanova
V.I. Il'ichev Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of SciencesVladivostok, Russia
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