Temporal variation of 134Cs and 137Cs activities in surface water at stations along the coastline near the Fukushima Dai-ichi Nuclear Power Plant accident site, Japan

DOI Web Site 被引用文献40件 参考文献11件
  • AOYAMA MICHIO
    Geochemical Research Department, Meteorological Research Institute
  • TSUMUNE DAISUKE
    Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry
  • UEMATSU MITSUO
    Center for International Collaboration, Atmosphere and Ocean Research Institute, The University of Tokyo
  • KONDO FUMIYOSHI
    Center for International Collaboration, Atmosphere and Ocean Research Institute, The University of Tokyo
  • HAMAJIMA YASUNORI
    Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University

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タイトル別名
  • Temporal variation of <sup>134</sup>Cs and <sup>137</sup>Cs activities in surface water at stations along the coastline near the Fukushima Dai-ichi Nuclear Power Plant accident site, Japan
  • Temporal variation of 134Cs and 137Cs activities in surface water at stations along the coastline near the Fukushima Dai-ichi Nuclear Power Plant accident site
  • Temporal variation of 134Cs and 137Cs activity in surface water at stations along the coastline near the Fukushima Daiichi Nuclear Power Plant accident site, Japan

抄録

We present our April to December 2011 observations of 134Cs and 137Cs activities in surface water at Hasaki, a coastal station 180 km south of the Fukushima Dai-ichi Nuclear Power Plant (FNPP1) accident site. We also investigate trends by using published data from several other coastal stations, including the accident site. The maximum in radiocaesium activity at Hasaki was observed in June 2011, representing a delay of two months from the corresponding maximum in April 2011 at FNPP1. Directly discharged 134Cs and 137Cs were transported dominantly southward along the coastline of northeastern Honshu, at least in May and June 2011. The reasons for the two-month delay at Hasaki are not yet clear, but clockwise current associated with a warm water eddy of which center located at 36.5 N, 141.4 E off Iwaki between Onahama and Hasaki in mid of May 2011 might prevent southward transport of 134Cs and 137Cs released from FNPP1 to Hasaki until the end of May 2011.

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