Hypoxia in the Pearl River Estuary, the South China Sea, in July 1999
Luo, L; Li, S; Wang, D; dxwang@scsio.ac.cn
2009
发表期刊AQUATIC ECOSYSTEM HEALTH & MANAGEMENT
ISSN1463-4988
卷号12期号:4页码:418-428
摘要The Pearl River Estuary empties into the South China Sea in southeastern China, and hypoxia is one of the major environmental problems here during summer. It can be caused by coastline, topography, hydrodynamics, tidal dynamics and biological processes (mainly by stratification and oxidation reaction). Since ecological processes are closely related to dynamic processes, we revise and link together both a physical and a biological model to establish a coupled hydrodynamic-ecological numerical model to study the summertime hypoxia. The model simulates physical and biological processes and reproduces the observed hypoxia in the bottom layer in two regions located in west shallow water and around Nei Lingding Island. A low-salinity plume forms after the freshwater drifts offshore. Strong stratification exists in the water body shoreward where the vertical mixing is weak. The salinity front and stratification cause a poor exchange in the vertical direction and greatly influence biological processes for nutrients, phytoplankton, and detritus, which induce the hypoxia occurrence in the bottom layer of the Pearl River Estuary. On the other hand, in two troughs the tide diminishes the strength of stratification and prohibits the large-scale growth of the hypoxia. The physical processes related to topography, run off and tidal mixing regulate the distribution of biological factors and the occurrence of hypoxia.
部门归属[Luo, L.; Wang, D.] Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Trop Marine Environm Dynam, Guangzhou 510301, Guangdong, Peoples R China; [Li, S.] Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China
关键词Salinity Front Stratification
学科领域Ecology ; Environmental Sciences ; Marine & Freshwater Biology ; Water Resources
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收录类别sci
资助项目LED
WOS记录号WOS:000273755800010
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被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/6047
专题热带海洋环境国家重点实验室(LTO)
通讯作者dxwang@scsio.ac.cn
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GB/T 7714
Luo, L,Li, S,Wang, D,et al. Hypoxia in the Pearl River Estuary, the South China Sea, in July 1999[J]. AQUATIC ECOSYSTEM HEALTH & MANAGEMENT,2009,12(4):418-428.
APA Luo, L,Li, S,Wang, D,&dxwang@scsio.ac.cn.(2009).Hypoxia in the Pearl River Estuary, the South China Sea, in July 1999.AQUATIC ECOSYSTEM HEALTH & MANAGEMENT,12(4),418-428.
MLA Luo, L,et al."Hypoxia in the Pearl River Estuary, the South China Sea, in July 1999".AQUATIC ECOSYSTEM HEALTH & MANAGEMENT 12.4(2009):418-428.
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