Assesment of radioecological state of the Far Eastern Seas of Russia in connection with a polluted water discharge from Fukushima-1 NPP (cruise no. 71 of RV Akademik Oparin)

During the cruise of RV “Akademik Oparin” an assessment of radioecological state of the Pacific Ocean east of Japan and Kuril Islands as well as Okhotsk and Japan seas was conducted in connection with polluted water discharge from Fukushima-1 NPP. Results of the first samples of surface analysis showed tritium content as 0.36–0.78 tritium units (0.04–0.09 Bk/l). The highest concentrations were found in the Kuroshio Extension stream and in the area of Southern Kuril Islands. Meanwhile it is ten thousands time lower than radio security norm. In the cruise samples of water, bottom sediments and marine biota were prepared to analyze radioisotopes of cesium, strontium, led, radium and others. Large volume of hydrographic, chemical, biological, gas-geochemical, mercury measurements and samplings was implemented. Mooring systems were recovered and deployed again. New data on water state and dynamics of the study region, as well as biogeochemical parameters and their interannual variability in association with climate change and increasing anthropogenic load were received.

Keywords

“Фукусима-1” тритий радионуклиды Тихий океан Куросио Курильские о-ва шельф о. Сахалин дальневосточные моря синоптические вихри гидрология биогеохимия

Date of publication

05.03.2026

Year of publication

2026

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GOST	Alekseev I., Balabon V., Bezhin N., Goryachev V., Gulenko T., Kalinchuk V., Kholmogorov A., Khomenko I., Komolov A., Kukla S., Kushnir P., Kuznetsova A., Lebedeva M., Legkodimov A., Leusov A., Lobanov V., Lukyanova N., Makseev D., Mazur A., Prushkovskaya I., Razzhivin V., Sagalaev S., Sergeev A., Skotorenko D., Sokolova E., Startsev A., Sysorov L., Tokar E., Yaroshchuk E., Zakharkov S. Assesment of radioecological state of the Far Eastern Seas of Russia in connection with a polluted water discharge from Fukushima-1 NPP (cruise no. 71 of RV “Akademik Oparin”) // Oceanology. – 2025. – V. 65. – Issue number 1 C. 193-196 . URL: https://oceanras.ru/s30345979s0030157425010175-1/?version_id=123550. DOI: 10.7868/S3034597925010175
MLA	Alekseev, I. F, Balabon, V. V, Bezhin, N. A, Goryachev, V. A, Gulenko, T. A, Kalinchuk, V. V, Kholmogorov, A. O, Khomenko, I. A, Komolov, A. S, Kukla, S. P, Kushnir, P. G, Kuznetsova, A. S, Lebedeva, M. A, Legkodimov, A. A, Leusov, A. E, Lobanov, V. B, Lukyanova, N. B, Makseev, D. S, Mazur, A. A, Prushkovskaya, I. A, Razzhivin, V. V, Sagalaev, S. G, Sergeev, A. F, Skotorenko, D. A, Sokolova, E. N, Startsev, A. M, Sysorov, L. N, Tokar, E. A, Yaroshchuk, E. I, Zakharkov, S. P "Assesment of radioecological state of the Far Eastern Seas of Russia in connection with a polluted water discharge from Fukushima-1 NPP (cruise no. 71 of RV “Akademik Oparin”)." Oceanology. 65.1 (2025).:193-196. DOI: 10.7868/S3034597925010175
APA	Alekseev I., Balabon V., Bezhin N., Goryachev V., Gulenko T., Kalinchuk V., Kholmogorov A., Khomenko I., Komolov A., Kukla S., Kushnir P., Kuznetsova A., Lebedeva M., Legkodimov A., Leusov A., Lobanov V., Lukyanova N., Makseev D., Mazur A., Prushkovskaya I., Razzhivin V., Sagalaev S., Sergeev A., Skotorenko D., Sokolova E., Startsev A., Sysorov L., Tokar E., Yaroshchuk E., Zakharkov S. (2025). Assesment of radioecological state of the Far Eastern Seas of Russia in connection with a polluted water discharge from Fukushima-1 NPP (cruise no. 71 of RV “Akademik Oparin”). Oceanology. vol. 65, no. 1, pp.193-196 DOI: 10.7868/S3034597925010175

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Assesment of radioecological state of the Far Eastern Seas of Russia in connection with a polluted water discharge from Fukushima-1 NPP (cruise no. 71 of RV “Akademik Oparin”)

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Assesment of radioecological state of the Far Eastern Seas of Russia in connection with a polluted water discharge from Fukushima-1 NPP (cruise no. 71 of RV “Akademik Oparin”)

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