Spatial variability of hypoxia and coupled physical-biogeochemical controls off the Changjiang (Yangtze River) Estuary in summer

doi:10.3389/fmars.2022.987368

IOCAS-IR

	Spatial variability of hypoxia and coupled physical-biogeochemical controls off the Changjiang (Yangtze River) Estuary in summer
	Wei, Qinsheng 1,2; Yuan, Yongquan2,3 ; Song, Shuqun 2,3; Zhao, Yuhang 1; Sun, Junchuan1 ; Li, Caiwen2,3 ; Wang, Baodong 1,2
	2022-10-04
发表期刊	FRONTIERS IN MARINE SCIENCE
卷号	9 页码:18
通讯作者	Wei, Qinsheng([email protected]) ; Wang, Baodong([email protected])
摘要	Global estuarine hypoxia is among the most acute environmental issues, yet the recognition of hypoxia variability remains patchy. The Changjiang (Yangtze River) Estuary (CE) is well known as one of the largest estuarine hypoxic systems. However, the mechanisms controlling the spatial variability and heterogeneity of summer hypoxia have been rarely examined in this region. Based on observational data in the summer of 2013, the essential linkages between physical-biogeochemical processes and spatial variability of hypoxia were revealed off the CE. The hypoxia generally occurred in a transitional region off the CE, presenting to be spatially variable and heterogeneous in its distribution and intensity. The river plume, stratification, front, upwelling and localized high phytoplankton biomass combine to shape the spatial morphology and scope of hypoxia. The spatial heterogeneity of hypoxic magnitude in horizontal direction is mainly regulated by the intensity variability of stratification and phytoplankton blooms. The position of bottom front formed by the offshore Taiwan Warm Current (TWC) and coastal water under tidal mixing controls the shoreward boundary of hypoxic zone, while the river plume front-dominated outer edge of phytoplankton blooms in upper layers plays a role in determining the seaward limit of the reach of bottom hypoxia. The stratification depth controlled by the upwelling and river plume governs the upper limit of the top reach of hypoxia, and shapes the vertical morphology of hypoxic zone. We contextualize the role of physical-biogeochemical drivers to the spatially variable hypoxia in a conceptual diagram. The findings would considerably contribute to our understanding of the spatially variable hypoxia in river plume-upwelling-front coupled estuarine systems, providing a sound basis for prediction and simulation under anticipated future conditions.
关键词	hypoxia river plume stratification upwelling front physical-biogeochemical processes Changjiang (Yangtze River) Estuary
DOI	10.3389/fmars.2022.987368
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC); Basic Scientific Fund of the National Public Research Institutes of China; [41876085]; [41876075]; [2020S03]
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Marine & Freshwater Biology
WOS记录号	WOS:000871307400001
出版者	FRONTIERS MEDIA SA
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/180657
专题	中国科学院海洋研究所
通讯作者	Wei, Qinsheng; Wang, Baodong
作者单位	1.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Ecoenvironm Sci & Technol, Qingdao, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Wei, Qinsheng,Yuan, Yongquan,Song, Shuqun,et al. Spatial variability of hypoxia and coupled physical-biogeochemical controls off the Changjiang (Yangtze River) Estuary in summer[J]. FRONTIERS IN MARINE SCIENCE,2022,9:18.
APA	Wei, Qinsheng.,Yuan, Yongquan.,Song, Shuqun.,Zhao, Yuhang.,Sun, Junchuan.,...&Wang, Baodong.(2022).Spatial variability of hypoxia and coupled physical-biogeochemical controls off the Changjiang (Yangtze River) Estuary in summer.FRONTIERS IN MARINE SCIENCE,9,18.
MLA	Wei, Qinsheng,et al."Spatial variability of hypoxia and coupled physical-biogeochemical controls off the Changjiang (Yangtze River) Estuary in summer".FRONTIERS IN MARINE SCIENCE 9(2022):18.

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