Sinking velocity of particulate radiocesium in the northwestern North Pacific

DOI Web Site Web Site 被引用文献12件 参考文献18件 オープンアクセス
  • Makio C. Honda
    Department of Environmental Geochemical Cycle Research; Japan Agency for Marine-Earth Science and Technology (JAMSTEC); Yokosuka Japan
  • Hajime Kawakami
    Public Relations Department, JAMSTEC; Yokosuka Japan

書誌事項

公開日
2014-06-06
資源種別
journal article
権利情報
  • http://doi.wiley.com/10.1002/tdm_license_1
  • http://onlinelibrary.wiley.com/termsAndConditions
DOI
  • 10.1002/2014gl060126
公開者
American Geophysical Union (AGU)

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説明

Sinking particles (SP) were collected by time series sediment traps at two depths in the northwestern Pacific before and after the Fukushima Daiichi Nuclear Power Plant accident, and accident-derived particulate radiocesium was measured. Radiocesium (137Cs) was first detected at 500 m (4810 m) about 2 weeks (1 month) after the accident. 137Cs of SP collected over 1 year revealed that the time lag between two depths was larger than that for the first 137Cs detection (about 2 weeks). We estimated the transient sinking velocity (SV) from the cumulative temporal 137Cs flux and the time lags at the two depths. Although the SV of SP collected in very early period was large, the estimated SV of most particulate 137Cs (about 80%) was about 50 m d−1. Based on comparison of 137Cs concentration in total SP with that in SP without organic materials, we suspect that most of the 137Cs was likely incorporated into aluminosilicates.

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