Biogeosciences
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Articles | Volume 18, issue 19
Articles | Volume 18, issue 19
https://doi.org/10.5194/bg-18-5539-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-18-5539-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 19
Research article
 | 
13 Oct 2021
Research article |  | 13 Oct 2021

Episodic subduction patches in the western North Pacific identified from BGC-Argo float data

Shuangling Chen, Mark L. Wells, Rui Xin Huang, Huijie Xue, Jingyuan Xi, and Fei Chai

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Latest update: 28 Oct 2025
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Short summary
Subduction transports surface waters to the oceanic interior, which can supply significant amounts of carbon and oxygen to the twilight zone. Using a novel BGC-Argo dataset covering the western North Pacific, we successfully identified the imprints of episodic shallow subduction patches. These subduction patches were observed mainly in spring and summer (70.6 %), and roughly half of them extended below ~ 450 m, injecting carbon- and oxygen-enriched waters into the ocean interior.
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