Отправить статью по E-mail Features of hydrological regime nearby the Pacific coast of the northern Kuril Islands based on ship oceanographic surveys
- Авторы: Shevchenko G.V.1,2, Chastikov V.N.1, Ulchenko V.A.3
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Учреждения:
- Sakhalin Branch of Russian Federal Research Institute of Fisheries and Oceanography
- Institute of Marine Geology and Geophysics, Far Eastern Branch of Russian Academy of Sciences
- Russian Federal Research Institute of Fisheries and Oceanography
- Выпуск: Том 32, № 2 (2025)
- Страницы: 253-269
- Раздел: Experimental and field research
- URL: https://journal-vniispk.ru/1573-160X/article/view/293803
- ID: 293803
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Аннотация
Purpose. This study aims to examine the vertical distributions of temperature, salinity, and geostrophic currents along repeated sections during different seasons, based on oceanographic survey data.
Methods and Results. The analysis is based on data from seven surveys conducted in spring (May), summer (July–September), and autumn (November) along four selected transects crossing the shelf and continental slope off the southeastern coast of Kamchatka, the Fourth Kuril Strait, and the Severgin Strait. Variations in the surface heated layer, as well as in the cold and warm intermediate layers, are assessed. It is shown that in spring and autumn, the cold intermediate layer extends throughout the water column, whereas in the deep-sea area, it is underlain by a warm intermediate layer. In autumn, the upper boundary of the cold intermediate layer deepens, likely due to wind-wave mixing. Freshened water (with salinity as low as 31.5 PSU), resulting from ice melt in the Bering Sea, is observed off the southeastern coast of Kamchatka in July. However, salinity in the study area remains generally high.
Calculated geostrophic current velocities indicate that a consolidated southwestward flow, extending through the entire water column and most pronounced above the slope, is observed only in spring—likely a remnant of winter circulation patterns. In summer and autumn, currents are more variable, with different directions in different layers and along various parts of the transects.
Conclusions. The analysis of oceanographic survey data demonstrates that the underwater Vityaz Ridge significantly influences the hydrological conditions in the Northern Kuril Islands region. Specifically, warm intermediate layer waters weakly penetrate into the northern part of the trough between the ridge and the Kuril Islands, while the cold intermediate layer develops down to depths of 500 m. In this area, current directions often differ from those over the continental slope. Although rare, negative seawater temperatures are occasionally recorded in the cores of the cold intermediate layer. The Kamchatka and Kuril currents are clearly defined in spring and become weaker during summer and autumn.
Об авторах
Georgy Shevchenko
Sakhalin Branch of Russian Federal Research Institute of Fisheries and Oceanography; Institute of Marine Geology and Geophysics, Far Eastern Branch of Russian Academy of Sciences
Автор, ответственный за переписку.
Email: shevchenko_zhora@mail.ru
ORCID iD: 0000-0003-0785-4618
Head of Oceanography Laboratory, Sakhalin Branch of Russian Federal Research Institute of Fisheries and Oceanography (VNIRO), Leading Research Associate of Tsunami Laboratory, Institute of Marine Geology and Geophysics, Far Eastern Branch of Russian Academy of Sciences, DSc (Phys.-Math.)
Россия, Yuzhno-Sakhalinsk; Yuzhno-SakhalinskValeriy Chastikov
Sakhalin Branch of Russian Federal Research Institute of Fisheries and Oceanography
Email: Shevchenko_zhora@mail.ru
Scopus Author ID: 8510411400
Leading Researcher of Oceanography Laboratory
Россия, Yuzhno-SakhalinskVasily Ulchenko
Russian Federal Research Institute of Fisheries and Oceanography
Email: Shevchenko_zhora@mail.ru
Deputy Head of Marine Fish Department
Россия, MoscowСписок литературы
- Bogdanov, K.T. and Moroz, V.V., 2000. Structure, Dynamic and Hydrology-Acoustical Water Characteristics Peculiarities of the Kuril Straits Area. Vladivostok: Dalnauka, 152 p. (in Russian).
- Byshev, V.I., Figurkin, A.L. and Anisimov, I.M., 2016. Recent Climate Changes of Thermohaline Structure in the North-West Pacific. Izvestiya TINRO, 185(2), pp. 215-227. https://doi.org/10.26428/1606-9919-2016-185-215-227 (in Russian).
- Khen, G.V., Ustinova, E.I., Figurkin, A.L., Zuenko, Yu.I., Novikov, Yu.V., Sorokin, Yu.D. and Gamanyuk, M.V., 2004. Hydrological Conditions of the Northwestern Pacific and the Far Eastern Seas at the Beginning of the 21st Century and Expected Trends. Voprosy Promyslovoi Okeanologii, (1), pp. 40-58 (in Russian).
- Khen, G.V., Ustinova, E.I. and Sorokin, Yu.D., 2022. Long-Term Changes in Thermal Conditions on the Surface of the Far-Eastern Seas and North-West Pacific and Their Relationship with Large-Scale Climate Processes. Izvestiya TINRO, 202(1), pp. 187-207. https://doi.org/10.26428/1606-9919-2022-202-187-207 (in Russian).
- Kantakov, G.A., 2000. Oceanographic Regime of the Pacific Shelf and Continental Slope of the Northern Kuril Islands and Its Influence on Distribution of Commercial Fishery Targets. In: B. N. Kotenev, ed., 2000. Commercial and Biological Studies of Fishes in the Pacific Waters of the Kuril Islands and Adjacent Areas of the Okhotsk and Bering Seas in 1992-1998. Moscow: VNIRO Publishing, pp. 54-64 (in Russian).
- Bogdanov, K.T. and Moroz, V.V., 2004. The Kuril-Kamchatka Current and Oyashio Current Water. Vladivostok: Dalnauka, 141 p. (in Russian).
- Moroz, V.V., 2011. The Water Thermohaline Structure Peculiarities and Temperature Anomalies Dynamics in the Kuril Island Zone and the Adjacent Areas. Vestnik of the Far East Branch of the Russian Academy of Sciences, 3(157), pp. 96-103 (in Russian).
- Uda, M., 1963. Oceanography of the Subarctic Pacific Ocean. Journal of the Fisheries Board of Canada, 20(1), pp. 119-179. https://doi.org/10.1139/f63-011
- Talley, L.D., 1993. Distribution and Formation of North Pacific Intermediate Water. Journal of Physical. Oceanography, 23(3), pp. 517-537. https://doi.org/10.1175/1520-0485(1993)023<0517:DAFONP>2.0.CO;2
- Zhukov, L.A., 1954. [Fundamentals of the Hydrological Regime of the Kuril Region of the Pacific Ocean]. In: AS SSSR, 1954. The Works of the Kuril-Sakhalin Marine Complex Expedition of the ZIN‒TINRO, 1947-1949. Publishing House of the USSR Academy of Sciences. Vol. 1, pp. 304-390 (in Russian).
- Shevchenko, G.V. and Romanov, A.A., 2006. [Seasonal Variability in the Upper Layer of the Sea of Okhotsk from Altimetry Data]. Meteorologiya i Gidrologiya, (8), pp. 59-71 (in Russian).
- Glukhovsky, B.Kh., ed., 1998. Hydrometeorology and Hydrochemistry of the Seas. Vol. IX: The Sea of Okhotsk. Issue 1: Hydrometeorological Conditions. Saint Petersburg: Hydrometeoizdat, 343 p. (in Russian).
- Moroz, V.V., 1999. [Variability of Hydrological Conditions of the Kuril Islands Region in the Warm Half-Year Due to the Peculiarities of Atmospheric Circulation]. Meteorologiya i Gidrologiya, (12), pp. 88-93 (in Russian).
- Rogachev, K.A. and Shlyk, N.V., 2005. Multiyear Variability of the Wind Stress Curl and Sea Level in the Kamchatka Current. Oceanology, 45(3), pp. 317-326.
- Sedaeva, O.S. and Shevchenko, G.V., 2001. Investigation of Seasonal Fluctuations of Sea Level and Atmospheric Pressure in the Area of Kuril Ridge. In: G. V. Shevchenko, ed., 2001. Dynamic Processes on the Shelf of Sakhalin and the Kuril Islands. Yuzhno-Sakhalinsk: IMGiG FEB RAS, pp. 81-93 (in Russian).
- Shevchenko, G.V. and Romanov, A.A., 2008. Determination of Parameters of Tidal Diurnal Shelf Waves in the Area of the North Kuril Islands from the Satellite Altimetry Data. Issledovanie Zemli iz Kosmosa, (3), pp. 76-87 (in Russian).
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