期刊
ELEMENTS
卷 8, 期 3, 页码 207-212出版社
MINERALOGICAL SOC AMER
DOI: 10.2113/gselements.8.3.207
关键词
oceanic dispersion simulation; radionuclides; Cs-137; Fukushima Daiichi nuclear power plant; regional ocean simulation; mesoscale eddy
Five models have been used to estimate the oceanic dispersion of Cs-137 from the Fukushima Daiichi nuclear power plant during March and April 2011, following the accident on March 11, 2011. The total discharged activity of Cs-137 is estimated to be 2 to 15 petabequerels. A weak southward current along the Fukushima coast was responsible for the initial transport direction, while mesoscale eddy-like structures and surface-current systems contributed to dispersion in areas beyond the continental shelf. Most of the discrepancies among the models in April are caused by differences in how the mesoscale current structures off the Ibaraki coast are represented.
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