Biogeosciences
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Articles | Volume 19, issue 7
Articles | Volume 19, issue 7
https://doi.org/10.5194/bg-19-2043-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-2043-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 7
Research article
 | 
14 Apr 2022
Research article |  | 14 Apr 2022

New constraints on biological production and mixing processes in the South China Sea from triple isotope composition of dissolved oxygen

Hana Jurikova, Osamu Abe, Fuh-Kwo Shiah, and Mao-Chang Liang

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Latest update: 24 Oct 2025
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Short summary
We studied the isotopic composition of oxygen dissolved in seawater in the South China Sea. This tells us about the origin of oxygen in the water column, distinguishing between biological oxygen produced by phytoplankton communities and atmospheric oxygen entering seawater through gas exchange. We found that the East Asian Monsoon plays an important role in determining the amount of oxygen produced vs. consumed by the phytoplankton, as well as in inducing vertical water mass mixing.
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