Biogeosciences
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Articles | Volume 23, issue 10
Articles | Volume 23, issue 10
https://doi.org/10.5194/bg-23-3591-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-3591-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 10
Research article
 | 
26 May 2026
Research article |  | 26 May 2026

Factors controlling dissolved 137Cs activities in Matsukawa-ura lagoon, a semi-closed estuary, after the Fukushima accident

Takuya Niida, Hyoe Takata, Sho Watanabe, Shinya Namura, and Toshihiro Wada

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Latest update: 26 May 2026
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Short summary
This study on 137Cs was conducted in Matsukawa-ura lagoon, a semi-enclosed estuary 40 km north of Fukushima Dai-ichi Nuclear Power Plant. Few studies exist on 137Cs in estuaries, so this research aimed to estimate its source using mass balance calculations. Results indicated that dissolved 137Cs in the lagoon is influenced by water temperature, with bottom sediments contributing more significantly to 137Cs levels than river sources.
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