Study of oceanographic conditions in the area of the avachinskiy bay of kamchatka in winter in the expedition on the r/v “akademik oparin” (cruise no. 65)

V. B. Lobanov; Лобанов В. Б.; A. F. Sergeev; Сергеев А. Ф.; P. Yu. Semkin; Семкин П. Ю.; N. B. Lukyanova; Лукьянова Н. Б.; V. A. Goryachev; Горячев В. А.; S. G. Sagalaev; Сагалаев С. Г.; V. Tsoy; Цой В.; I. F. Alekseev; Алексеев И. Ф.; Yu. A. Barabanshchikov; Барабанщиков Ю. А.; D. S. Kalyuzhniy; Калюжный Д. С.; P. G. Kushnir; Кушнир П. Г.; A. A. Mazur; Мазур А. А.; I. A. Prushkovskaya; Прушковская И. А.; V. V. Razzhivin; Разживин В. В.; A. A. Ryumina; Рюмина А. А.; D. D. Sokolov; Соколов Д. Д.; O. A. Ulanova; Уланова О. А.; E. M. Shkirnikova; Шкирникова Е. М.

doi:10.31857/S0030157424050163

Study of oceanographic conditions in the area of the avachinskiy bay of kamchatka in winter in the expedition on the r/v “akademik oparin” (cruise no. 65)

Authors: Lobanov V.B.¹, Sergeev A.F.¹, Semkin P.Y.¹, Lukyanova N.B.¹, Goryachev V.A.¹, Sagalaev S.G.¹, Tsoy V.¹, Alekseev I.F.¹, Barabanshchikov Y.A.¹, Kalyuzhniy D.S.¹, Kushnir P.G.¹, Mazur A.A.¹, Prushkovskaya I.A.¹, Razzhivin V.V.¹, Ryumina A.A.¹, Sokolov D.D.¹, Ulanova O.A.¹, Shkirnikova E.M.¹
Affiliations:
1. V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch, Russian Academy of Sciences
Issue: Vol 64, No 5 (2024)
Pages: 863-866
Section: Информация
URL: https://journals.eco-vector.com/0030-1574/article/view/681410
DOI: https://doi.org/10.31857/S0030157424050163
EDN: https://elibrary.ru/OEVPGW
ID: 681410

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Abstract

During the cruise No. 65 of the R/V “Akademik Oparin”, which was carried out from November 26 to December 29, 2022, research was continued in the area of the Avachinskiy Bay of Kamchatka to study the possible factors that caused the mass moratlity of marine organisms in the Fall of 2020, and complex hydrographic and hydrochemical surveys on the northeastern shelf of Sakhalin Island to monitor the environmental situation in areas of oil and gas production and in the southern part of the Sea of Okhotsk. According to data from two autonomous moorings deployed in the coastal zone of Avachinskiy Bay with an exposure of 169 days, relatively calm water dynamics in the bay were noted throughout the entire Summer-Fall season of 2022, which contributed to the enrichment of waters with nutrients necessary for the development of plankton. No noticeable decrease in oxygen content was recorded. A survey of the southern part of the East Kamchatka Current was carried out, the evolution and the structure of the anticyclonic eddy of the Avachinskiy Bay at the moment of its splitting were traced. Hydrochemical characteristics of coastal bays and rivers during the freeze-up period were studied. Samples of plankton and bottom sediments were taken for special analyzes in the laboratories of the Pacific Institute of Bioorganic Chemistry and the National Center for Marine Biology of Far Eastern Branch of the Russian Academy of Sciences.

Keywords

Kamchatka Peninsula, Avachinskiy Bay, Sea of Okhotsk, Sakhalin shelf, mesoscale eddies, hydrography, biogeochemistry