Biogeosciences
Biogeosciences
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Articles | Volume 20, issue 20
Articles | Volume 20, issue 20
https://doi.org/10.5194/bg-20-4323-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-20-4323-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 20
Research article
 | 
24 Oct 2023
Research article |  | 24 Oct 2023

Contribution of the open ocean to the nutrient and phytoplankton inventory in a semi-enclosed coastal sea

Qian Leng, Xinyu Guo, Junying Zhu, and Akihiko Morimoto

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Short summary
Using a numerical model, we revealed that a large proportion of nutrients in a semi-enclosed sea (Seto Inland Sea, Japan) comes from the Pacific Ocean and supports about half of the phytoplankton growth in the sea. Such results imply that the human-made management of nutrient load from land needs to consider the presence of oceanic nutrients, which act as a background concentration and are not controlled by human activities.
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