Partitioning of carbon export in the euphotic zone of the oligotrophic South China Sea

Ma, Yifan; Zhou, Kuanbo; Chen, Weifang; Chen, Junhui; Yang, Jin-Yu Terence; Dai, Minhan

doi:https://doi.org/10.5194/bg-20-2013-2023

Articles | Volume 20, issue 11

https://doi.org/10.5194/bg-20-2013-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-20-2013-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 11

Research article

|

05 Jun 2023

Research article |

| 05 Jun 2023

Partitioning of carbon export in the euphotic zone of the oligotrophic South China Sea

Yifan Ma, Kuanbo Zhou, Weifang Chen, Junhui Chen, Jin-Yu Terence Yang, and Minhan Dai

Supplement

https://doi.org/10.5194/bg-20-2013-2023-supplement

Data sets

Vertical distribution of total and particulate 234Th, particulate organic carbon (POC) and nutrients with their physical forcings (temperature, salinity, fluorescence-based Chl a) Yifan Ma and Minhan Dai https://doi.org/10.57760/sciencedb.02782

Global Ocean Gridded L 4 Sea Surface Heights And Derived Variables Reprocessed 1993 Ongoing Satellite observations https://doi.org/10.48670/moi-00148

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Short summary

We distinguished particulate organic carbon (POC) export fluxes out of the nutrient-depleted layer (NDL) and the euphotic zone. The amount of POC export flux at the NDL base suggests that the NDL could be a hotspot of particle export. The substantial POC export flux at the NDL base challenges traditional concepts that the NDL was limited in terms of POC export. The dominant nutrient source for POC export fluxes should be subsurface nutrients, which was determined by ¹⁵N isotopic mass balance.