气候变化领域集成服务门户(CCPortal): Submarine Groundwater Discharge on the Western Shelf of the Northern South China Sea Influenced by the Pearl River Plume and Upwelling

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DOI	10.1029/2020JC016859
	Submarine Groundwater Discharge on the Western Shelf of the Northern South China Sea Influenced by the Pearl River Plume and Upwelling
	Dai G.; Wang G.; Li Q.; Tan E.; Dai M.
发表日期	2021
ISSN	21699275
卷号	126 期号:4
英文摘要	Submarine groundwater discharge (SGD) is a crucial material transport pathway across the continent–ocean margins. To evaluate the geochemical impacts of SGD on the western shelf of the northern South China Sea (NSCS), salinity, temperature, and radium were investigated in the summer of 2012. With Ra box models, the flux of SGD was estimated to be (1.0 ± 0.44) × 108 m3 day−1 (3.0 ± 1.3 cm day−1) in the upwelling-influenced area and (5.4 ± 2.3) × 108 m3 day−1 (1.8 ± 0.8 cm day−1) in the no-upwelling area. The flux of SGD in the no-upwelling area estimated using a three end-member mixing model was (2.1 ± 1.7) × 108 m3 day−1 (0.7 ± 0.5 cm day−1), consistent with the flux estimates above. In the upwelling-influenced area, the average net fluxes of dissolved inorganic nitrogen (DIN), soluble reactive phosphorus (SRP), dissolved silicate (DSi), dissolved carbon (including dissolved inorganic carbon, DIC, and organic carbon), and total alkalinity (TA) via SGD were 1–27 times greater than those from the upwelling. In the no-upwelling area, the average SGD-associated DIN, SRP, DSi, TA, and dissolved carbon fluxes were 22%–42% equivalent to the Pearl River estuarine exports. The net SRP flux from SGD could support 11%–13% of the new production on the shelf. The concentration of DIC on the shelf could increase by about 50 μmol L−1 due to the net DIC fluxes via SGD. These results indicate that SGD is a significant nutrient and carbon source more important than the upwelling and second to the Pearl River on the western shelf of the NSCS and needs to be considered in the shelf biogeochemistry. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Carbon; northern South China Sea; nutrients; Pearl River; submarine groundwater discharge; upwelling
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186399
作者单位	State Key Laboratory of Marine Environmental Science and College of Ocean and Earth Sciences, Xiamen University, Xiamen, China; Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Xiamen University, Xiamen, China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China
推荐引用方式 GB/T 7714	Dai G.,Wang G.,Li Q.,et al. Submarine Groundwater Discharge on the Western Shelf of the Northern South China Sea Influenced by the Pearl River Plume and Upwelling[J],2021,126(4).
APA	Dai G.,Wang G.,Li Q.,Tan E.,&Dai M..(2021).Submarine Groundwater Discharge on the Western Shelf of the Northern South China Sea Influenced by the Pearl River Plume and Upwelling.Journal of Geophysical Research: Oceans,126(4).
MLA	Dai G.,et al."Submarine Groundwater Discharge on the Western Shelf of the Northern South China Sea Influenced by the Pearl River Plume and Upwelling".Journal of Geophysical Research: Oceans 126.4(2021).