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<p>To evaluate the contribution of dry and wet <sup>137</sup>Cs deposition fluxes to the total <sup>137</sup>Cs atmospheric deposition flux, total and wet-only atmospheric deposition samples were collected from an area evacuated, eight years after the Fukushima Dai-ichi Nuclear Power Plant accident. Total <sup>137</sup>Cs deposition flux was high from late autumn to spring and low in summer. Approximately 70% of total <sup>137</sup>Cs deposition was attributed to dry deposition. A strong correlation was reported between wind speed and dry <sup>137</sup>Cs deposition flux. Wind-induced resuspension of <sup>137</sup>Cs containing particulate matter and its subsequent redeposition are considered important factors controlling <sup>137</sup>Cs deposition flux fluctuation at this site.</p>

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Contribution of dry and wet deposition to total deposition of 137Cs in Namie Town, Fukushima Prefecture, eight years after the Fukushima nuclear accident

  • 期刊论文

  • 发表日期：

    2026年2月19日

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  • Hidenao Hasegawa,
  • Yoshihito Ohtsuka,
  • Naofumi Akata,
  • Shinji Ueda,
  • Shinji Tokonami

摘要

To evaluate the contribution of dry and wet 137Cs deposition fluxes to the total 137Cs atmospheric deposition flux, total and wet-only atmospheric deposition samples were collected from an area evacuated, eight years after the Fukushima Dai-ichi Nuclear Power Plant accident. Total 137Cs deposition flux was high from late autumn to spring and low in summer. Approximately 70% of total 137Cs deposition was attributed to dry deposition. A strong correlation was reported between wind speed and dry 137Cs deposition flux. Wind-induced resuspension of 137Cs containing particulate matter and its subsequent redeposition are considered important factors controlling 137Cs deposition flux fluctuation at this site.