Assessments of Nitrate Budgets in the Yellow Sea Based on a 3D Physical-Biogeochemical Coupled Model
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Nitrate (NO3–) plays an important role in ecosystems and aquaculture in the Yellow Sea (YS). Sparse observational data suggest that ocean currents and nitrification are crucial to NO3– flux in the YS; however, a quantitative assessment of these fluxes has not yet been performed. This study investigates seasonal and spatial variations in NO3– flux via currents and biological processes in the YS from 2006 to 2019 using a physical-biogeochemical coupled model. The model results show that the current-driven fluxes exceeded biological processes in the eastern and central regions of the YS, unlike in the western and northern regions. Advection of NO3– in the YS is mainly driven by cyclonic circulation in summer and fall, and anticyclonic circulation in spring and winter. The Subei Coastal Current along the coast of China plays a primary role in net advective influx of NO3– to the YS year round. The NO3– influx by the Yellow Sea Warm Current along the lower layer of the southcentral YS is offset by outflux through wind-driven surface currents in winter. The southward movements of the Yellow Sea Bottom Cold Water in summer and the Korean Coastal Current in winter are major NO3– outfluxes to the East China Sea. In terms of biological processes, NO3– is mainly consumed by phytoplankton during the spring bloom and supplied through organic matter decomposition and nitrification. Net supply of NO3– by biological processes was the greatest in the southcentral YS where the Yellow Sea Bottom Cold Water is present.
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The North China Sea (NCS) represents an ecologically important yet understudied region for OAE impact assessment, owing to its distinctive hydrology, ecological complexity, and intense anthropogenic pressure.
“The North China Sea (NCS) represents an ecologically important yet understudied region for OAE impact assessment, owing to its distinctive hydrology, ecological complexity, and intense anthropogenic pressure (Tak et al., 2022).”
From Biogeochemical responses to ocean alkalinity enhancement in the North China Sea (2026) · cites this paper as Tak et al., 2022
The Introduction (page not supplied) describes the Yellow Sea as highly productive, rich in fishery resources, and shaped by seasonal currents; it also notes sparse observations concerning nitrate flux. The paper studies the Yellow Sea, not a region it calls the North China Sea, and the cited passages do not establish that the region is understudied for ocean alkalinity enhancement (OAE) impacts or subject to intense anthropogenic pressure. (LLM, conf=0.86)
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Biogeochemical responses to ocean alkalinity enhancement in the North China Sea
Xin, X., Liu, Y., Chang, R., Lei, R., Zhu, M., Wang, X., Wang, X. C., & Liu, J. (2026) · EGUsphere · doi:10.5194/egusphere-2026-5281
- Authors
- Tak, Y.-J., Cho, Y.-K., Hwang, J., & Kim, Y.-Y.
- Affiliations
- Seoul National University (KR)
- Corresponding author
- Cho, Yang-Ki
- Venue
- Frontiers in Marine Science
- Publisher
- Frontiers Media SA
- Published
- 2022-01-18
- Volume
- 8
- ISSN
- 2296-7745 (ISSN-L)
- OpenAlex
- W4205141739
- Cited by
- 12
- References
- 0
- Citations by year
- 2026: 4 · 2025: 1 · 2024: 4 · 2023: 2 · 2022: 1
- FWCI
- 0.99
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Frontiers in Marine Science (publishedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Seoul National University Open Repository (Seoul National University) (submittedVersion)
- Funders
- Ministry of Oceans and Fisheries
- Topics
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
- Physical Sciences › Environmental Science › Environmental Chemistry › Aquatic Ecosystems and Phytoplankton Dynamics
- Keywords
- nitrate budget, Yellow Sea, nitrification, phytoplankton uptake, Yellow Sea Warm Current, seasonal and spatial variation, physical-biogeochemical coupling, East China Sea
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