Biogeosciences
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Articles | Volume 23, issue 1
Articles | Volume 23, issue 1
https://doi.org/10.5194/bg-23-345-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-345-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 1
Research article
 | 
13 Jan 2026
Research article |  | 13 Jan 2026

Dynamic upper-ocean processes enhance mesopelagic carbon export of zooplankton fecal pellets in the southern South China Sea

Ruitong Wu, Zhifei Liu, Jiaying Li, Baozhi Lin, Yulong Zhao, Junyuan Cao, and Xiaodong Zhang

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Short summary
Zooplankton fecal pellets are key contributors to the marine biological pump. This study presents time-series sediment trap observations of fecal pellet export at 500 m water depth in the southern South China Sea. The results indicate that the mesopelagic fecal pellet carbon flux is primarily regulated by upper-ocean dynamic processes, including winter mixing, tropical cyclones, and mesoscale eddies, providing new insights into the dynamics of biological pump in oligotrophic ocean systems.
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