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Abstract <p>During cruise 71 of the R/V <i>Akademik Oparin</i>m the radioecological state of the Pacific Ocean east of Japan and the Kuril Islands, as well as the seas of Okhotsk and Japan, was assessed in connection with polluted water discharge from the Fukushima-1 NPP. The results of the first samples of surface analysis showed a tritium content of 0.36–0.78 tritium units (0.04–0.09 Bq/L). The highest concentrations were found in the jet of the Kuroshio Current and in the area of the Southern Kuril Islands. Meanwhile, it is ten thousands time lower than the radio security norm. On the cruise, samples of water, bottom sediments, and marine biota were prepared to analyze radio isotopes of cesium, strontium, lead, radium, etc. A large volume of hydrographic, chemical, biological, gas-geochemical, and mercury measurements and samplings was obtained. Mooring systems were recovered and redeployed. New data on the water state and dynamics of the study region were obtained, as well as biogeochemical parameters and their interannual variability in association with climate change and increasing anthropogenic load.</p>

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Assessment of the Radioecological State of the Far Eastern Seas of Russia in Connection with Polluted Water Discharge from the Fukushima-1 NPP (Cruise 71 of the R/V Akademik Oparin)

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • V. B. Lobanov,
  • V. A. Goryachev,
  • A. F. Sergeev,
  • N. B. Lukyanova,
  • I. F. Alekseev,
  • S. G. Sagalaev,
  • S. P. Zakharkov,
  • N. A. Bezhin,
  • T. A. Gulenko,
  • V. V. Kalinchuk,
  • A. S. Komolov,
  • A. E. Leusov,
  • E. A. Tokar,
  • A. O. Kholmogorov,
  • V. V. Balabon,
  • A. S. Kuznetsova,
  • S. P. Kukla,
  • P. G. Kushnir,
  • M. A. Lebedeva,
  • A. A. Legkodimov,
  • A. A. Mazur,
  • D. S. Makseev,
  • I. A. Prushkovskaya,
  • V. V. Razzhivin,
  • D. A. Skotorenko,
  • E. N. Sokolova,
  • A. M. Startsev,
  • L. N. Sysorov,
  • I. A. Khomenko,
  • E. I. Yaroshchuk

摘要

Abstract

During cruise 71 of the R/V Akademik Oparinm the radioecological state of the Pacific Ocean east of Japan and the Kuril Islands, as well as the seas of Okhotsk and Japan, was assessed in connection with polluted water discharge from the Fukushima-1 NPP. The results of the first samples of surface analysis showed a tritium content of 0.36–0.78 tritium units (0.04–0.09 Bq/L). The highest concentrations were found in the jet of the Kuroshio Current and in the area of the Southern Kuril Islands. Meanwhile, it is ten thousands time lower than the radio security norm. On the cruise, samples of water, bottom sediments, and marine biota were prepared to analyze radio isotopes of cesium, strontium, lead, radium, etc. A large volume of hydrographic, chemical, biological, gas-geochemical, and mercury measurements and samplings was obtained. Mooring systems were recovered and redeployed. New data on the water state and dynamics of the study region were obtained, as well as biogeochemical parameters and their interannual variability in association with climate change and increasing anthropogenic load.