Earth System Science Data
Earth System Science Data
Earth System Science Data
Articles | Volume 15, issue 5
Articles | Volume 15, issue 5
https://doi.org/10.5194/essd-15-1969-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-15-1969-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 15, issue 5
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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Latest update: 10 Jul 2025
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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.
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