Biogeosciences
Biogeosciences
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Articles | Volume 21, issue 23
Articles | Volume 21, issue 23
https://doi.org/10.5194/bg-21-5435-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-21-5435-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 23
Research article
 | 
06 Dec 2024
Research article |  | 06 Dec 2024

Source-to-sink pathways of dissolved organic carbon in the river–estuary–ocean continuum: a modeling investigation

Jialing Yao, Zhi Chen, Jianzhong Ge, and Wenyan Zhang

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Short summary
The transformation of dissolved organic carbon (DOC) in estuaries is vital for coastal carbon cycling. We studied source-to-sink pathways of DOC in the Changjiang Estuary using a physics–biogeochemistry model. Results showed a transition of DOC from a sink to a source in the plume area during summer, with a transition from terrestrial-dominant to marine-dominant DOC. Terrigenous and marine DOC exports account for about 31 % and 69 %, respectively.
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