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首页> 外文期刊>Marine Chemistry >Convection of surface water in the northeastern Japan Sea: Implications from vertical profiles of ~(134)Cs concentrations
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Convection of surface water in the northeastern Japan Sea: Implications from vertical profiles of ~(134)Cs concentrations

机译:日本东北海地表水的对流:〜(134)Cs浓度垂直分布的含义

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摘要

This study examined the spatial profiles of Cs-134 concentrations in the Japan Sea (particularly in the northeastern area) in July 2017 and July 2018. We detected Cs-134 in water samples above a depth of similar to 200 m (similar to 0.3-1 mBq/L decay-corrected to the date of the Fukushima Dai-ichi Nuclear Power Plant accident), which predominantly reflected the mixing of Cs-134-contaminated Tsushima Warm Current (TWC) water within 4 years after Cs-134 reentry from the Pacific Ocean into the Japan Sea in 2013. Furthermore, Cs-134 was only detected at depths of 300 m and 500 m (similar to 0.2 mBq/L) in the northern Japan Basin, which corresponded to similar to 30% of the annual mean concentration levels in TWC water (0.75 mBq/L). Observed spatial variations in Cs-134 concentrations were explained by the surface TWC circulation and subsequent convection processes.
机译:这项研究调查了2017年7月和2018年7月日本海(尤其是东北地区)中Cs-134浓度的空间分布。我们在水深超过200 m(约0.3- 1 mBq / L衰减校正至福岛第一核电站事故发生之日),主要反映了从Cs-134再次进入后的4年内受Cs-134污染的对马暖流(TWC)水的混合。 2013年,太平洋进入日本海。此外,仅在日本北部盆地的300 m和500 m(约0.2 mBq / L)深度处检测到Cs-134,相当于年均值的30% TWC水中的浓度水平(0.75 mBq / L)。表面TWC循环和随后的对流过程解释了Cs-134浓度的空间变化。

著录项

  • 来源
    《Marine Chemistry》 |2019年第20期|103661.1-103661.7|共7页
  • 作者单位

    Kanazawa Univ, Low Level Radioact Lab, Wake O-24, Nomi, Ishikawa 9231224, Japan;

    Kanazawa Univ, Low Level Radioact Lab, Wake O-24, Nomi, Ishikawa 9231224, Japan;

    Kanazawa Univ, Low Level Radioact Lab, Wake O-24, Nomi, Ishikawa 9231224, Japan;

    Kyushu Univ, Appl Mech Res Inst, 6-1 Kasuga Koen, Kasuga, Fukuoka 8168580, Japan;

    Japan Fisheries Res & Educ Agcy, Natl Res Inst Fisheries Sci, 2-12-4 Fukuura, Yokohama, Kanagawa 2368648, Japan;

    Japan Fisheries Res & Educ Agcy, Natl Res Inst Fisheries Sci, 2-12-4 Fukuura, Yokohama, Kanagawa 2368648, Japan;

    Kanazawa Univ, Low Level Radioact Lab, Wake O-24, Nomi, Ishikawa 9231224, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cs-134; Fukushima Dai-ichi nuclear power plant accident; Tsushima warm current; Japan Basin;

    机译:CS-134;福岛第一核化学研究所(Fukushima Daiichi nu cear r poer p tan t ashinden t);对马;

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