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Activity concentration of Fukushima-derived radiocesium in the western subarctic area of the North Pacific Ocean in summer 2017
Ist Teil von
Journal of radioanalytical and nuclear chemistry, 2020-07, Vol.325 (1), p.263-270
Ort / Verlag
Cham: Springer International Publishing
Erscheinungsjahr
2020
Link zum Volltext
Quelle
SpringerLink (Online service)
Beschreibungen/Notizen
Vertical profiles of radiocesium (
134
Cs and
137
Cs) were measured in the western subarctic area of the North Pacific in 2017. The highest concentration of
134
Cs, which was derived from the accident of the Fukushima Dai-ichi Nuclear Power Plant in 2011, was 0.14 Bq m
−3
(or 1.19 Bq m
−3
after the decay correction to the accident date). Although the vertical inventory of
134
Cs decreased between 2014 and 2017, the inventory in 2017 was larger than that expected. That was probably arose from the return of some portion of the high-concentration water mass along with the anticlockwise subarctic gyre current.