Offshore detachment of the Changjiang River plume and its ecological impacts in summer

doi:10.1007/s10872-016-0402-0

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋环境与数值模拟研究室

	Offshore detachment of the Changjiang River plume and its ecological impacts in summer
	Wei, Qinsheng 1,2; Yu, Zhigang 1,3; Wang, Baodong 2,3; Wu, Hui 4; Sun, Junchuan 2; Zhang, Xuelei 2,3; Fu, Mingzhu 2; Xia, Changshui 2; Wang, Huiwu 2
刊名	JOURNAL OF OCEANOGRAPHY
	2017-06
卷号	73 期号:3 页码:277-294
关键词	Changjiang Estuary Offshore low-salinity water Upwelling Anticyclonic eddy Ecological impacts
ISSN号	0916-8370
DOI	10.1007/s10872-016-0402-0
英文摘要	The Changjiang Diluted Water (CDW) significantly influences the chemical, biological, and sedimentary processes in the Yellow and East China Seas. Based on in situ observations during the summers of 2006 and 2008 and associated satellite-derived data, the offshore detachment of the CDW plume and its mechanisms are investigated, and the related ecological impacts associated with the detached CDW are examined. We show that the detached low-salinity water from the CDW plume can partially reach the seabed, with its volume gradually diminishing from the surface to the seabed, and with a horizontal distribution that initially shifts eastward and then southward. The double-upwelling system, combined with the prevailing southerly wind and the anticyclonic eddy off the Changjiang Estuary, favors the detachment of the CDW plume. In particular, the anticyclonic eddy provides a habitat or venue for the formation and maintenance of the detached low-salinity water, and is responsible for the local presence of low-salinity water along the seabed. Data analysis indicates that this detachment can induce phytoplankton blooms and that enhanced chlorophyll a (Chl-a) contents were significantly associated with moderate nutrient concentrations and good light conditions in the offshore low-salinity water. This study also demonstrates that the variability in the vertical distribution of Chl-a off the Changjiang Estuary is related to the offshore detached CDW, and that the local deepening of the DCM (depth of Chl-a maximum) and the peak primary production occur within the offshore CDW. More importantly, we find that high Chl-a concentrations in the bottom water can be induced by the anticyclonic-eddy-featuring offshore CDW. Our results may facilitate a better understanding on the role of the detached CDW in local marine biogeochemical processes.
资助项目	UNDP/GEF Project of Reducing Environmental Stress in the Yellow Sea Large Marine Ecosystem[E-I-08-sum-jcchneco-2121]
WOS研究方向	Oceanography
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000401432100001
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3156]
专题	业务部门_海洋环境与数值模拟研究室
作者单位	1.Ocean Univ China, Key Lab Marine Chem Theory & Technol, Minist Educ, 238 Songling Rd, Qingdao 266100, Peoples R China; 2.State Ocean Adm, Inst Oceanog 1, 6 Xianxialing Rd, Qingdao 266061, Peoples R China; 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China; 4.East China Normal Univ, State Key Lab Estuarine & Coastal Res, 3663 Zhongshanbei Rd, Shanghai 200062, Peoples R China
推荐引用方式 GB/T 7714	Wei, Qinsheng,Yu, Zhigang,Wang, Baodong,et al. Offshore detachment of the Changjiang River plume and its ecological impacts in summer[J]. JOURNAL OF OCEANOGRAPHY,2017,73(3):277-294.
APA	Wei, Qinsheng.,Yu, Zhigang.,Wang, Baodong.,Wu, Hui.,Sun, Junchuan.,...&Wang, Huiwu.(2017).Offshore detachment of the Changjiang River plume and its ecological impacts in summer.JOURNAL OF OCEANOGRAPHY,73(3),277-294.
MLA	Wei, Qinsheng,et al."Offshore detachment of the Changjiang River plume and its ecological impacts in summer".JOURNAL OF OCEANOGRAPHY 73.3(2017):277-294.