Articles | Volume 18, issue 19
Biogeosciences, 18, 5539–5554, 2021
Biogeosciences, 18, 5539–5554, 2021
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 et al.

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Cited articles

Argo: Argo float data and metadata from Global Data Assembly Centre (Argo GDAC), SEANOE [data set],, 2021. 
Boyd, P. W., Claustre, H., Levy, M., Siegel, D. A., and Weber, T.: Multi-faceted particle pumps drive carbon sequestration in the ocean, Nature, 568, 327–335,, 2019. 
Brainerd, K. E. and Gregg, M. C.: Surface mixed and mixing layer depths, Deep.-Sea. Res. Pt. I., 42, 1521-1543,, 1995. 
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.
Final-revised paper