Articles | Volume 15, issue 5
https://doi.org/10.5194/essd-15-1969-2023
https://doi.org/10.5194/essd-15-1969-2023
Data description paper
 | 
15 May 2023
Data description paper |  | 15 May 2023

Evaluating the transport of surface seawater from 1956 to 2021 using 137Cs deposited in the global ocean as a chemical tracer

Yayoi Inomata and Michio Aoyama

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Cited articles

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Aarkrog, A.: Input of anthropogenic radionuclides into the World Ocean, Deep-Sea Res. Pt. II, 50, 2597–2606, 2003. 
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Aoyama, M.: Long-range transport of radiocaesium derived from global fallout and the Fukushima accident in the Pacific Ocean since 1953 through 2017 – Part I: Source term and surface transport, J. Radioanal. Nucl. Chem., 318, 1519–1542, 2018. 
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Short summary
The behavior of 137Cs in surface seawater in the global ocean was analyzed by using the HAMGlobal2021 database. Approximately 32 % of 137Cs existed in the surface seawater in 1970. The 137Cs released into the North Pacific Ocean by large-scale nuclear weapons tests was transported to the Indian Ocean and then the Atlantic Ocean on a 4–5 decadal timescale, whereas 137Cs released from nuclear reprocessing plants was transported northward to the Arctic Ocean on a decadal scale.