Abstract
Investigation of the interannual and short-term variability of the water parameters in the seas of Japan and Okhotsk and their ecological state were continued on cruises 77 of the R/V Professor Gagarinskiy and 97 of the R/V Akademik M.A. Lavrentyev in fall–winter 2021. CTD profiling and water sampling for chemical analyses, including methane and radioisotopes, were carried out. Autonomous bottom stations were moored for 2.5 months. Long-term trends of bottom water warming, eutrophication, and acidification of the Sea of Japan have been confirmed. The specific features of fall–winter restructuring of the field of currents in the northern Sea of Japan, multifrontality of the Sakhalin upwelling structure, and bimodality of the Primorye Current are shown.
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Funding
The expedition was funded by the Russian Ministry of High Education and Science. The research was carried out within the state task of the POI FEB RAS for 2021 (topic nos. 4, 6, 9, and 11; registration nos. 121021500055-0, 121021700346-7, АААА-А20-120011090005-7 and 12121500052-9), as well as under the international programs CREAMS/PICES of the North Pacific Marine Sciences Organization (PICES) and Northeast Asian Regional–Global Ocean Observation System (NEAR-GOOS) of IOC/WESTPAC.
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Lobanov, V.B., Sergeev, A.F., Goryachev, V.A. et al. Study of the State and Variability of the Japan and Okhotsk Seas in the 77th Cruise of the R/V Professor Gagarinskiy and 97th Cruise of the R/V Akademik M.A. Lavrentyev. Oceanology 63, 434–437 (2023). https://doi.org/10.1134/S0001437023030098
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DOI: https://doi.org/10.1134/S0001437023030098