Response of salinity distribution around the Yellow River mouth to abrupt changes in river discharge

doi:10.1016/j.csr.2011.01.005

	Response of salinity distribution around the Yellow River mouth to abrupt changes in river discharge
	Wang, Yucheng 1; Liu, Zhe 1,2; Gao, Huiwang 1; Ju, Lian 3,4; Guo, Xinyu 5
刊名	CONTINENTAL SHELF RESEARCH
	2011-04-15
卷号	31 期号:6 页码:685-694
关键词	River plume Discharge variation Salinity distribution Tidal mixing Yellow River
ISSN号	0278-4343
DOI	10.1016/j.csr.2011.01.005
英文摘要	To investigate how salinity changes with abrupt increases and decreases in river discharge, three surveys were conducted along six sections around the Yellow River mouth before, during and after a water regulation event during which the river discharge was increased from similar to 200 to > 3000 m(3) s(-1) for the first 3 days, was maintained at > 3000 m(3) s(-1) for the next 9 days and was decreased to <1000 m(3) s(-1) for the final 4 days. The mean salinity in the Yellow River estuary area during the event varied similar to 1.21, which is much larger than its seasonal variation (similar to 0.50) and interannual variation (similar to 0.05). Before the event, a small plume was observed near the river mouth. During the event, the plume extended over 24 km offshore in the surface layer in the direction of river water outflow. After the event, the plume diminished in size but remained larger than before the event. The downstream propagation of the plume (as in a Kelvin wave sense) was apparent in the bottom layer during the second survey and in both the surface and bottom layers during the third survey. The plume sizes predicted by the formulas from theoretical studies are larger than those we observed, indicating that factors neglected by theoretical studies such as the temporal variation in river discharge and vertical mixing in the sea could be very important for plume evolution. In addition to the horizontal variation of the plume, we also observed the penetration of freshwater from the surface layer into the bottom layer. A comparison of two vertical processes, wind mixing and tidal mixing, suggests that the impact of wind mixing may be comparable with that of tidal mixing in the area close to the river mouth and may be dominant over offshore areas. The change in Kelvin number indicates an alteration of plume dynamics due to the abrupt change in river discharge during the water regulation event. (C) 2011 Elsevier Ltd. All rights reserved.
资助项目	Japan Society for the Promotion of Science (JSPS)[21310012]
WOS关键词	BUOYANT COASTAL DISCHARGES ; NORTH ADRIATIC SEA ; TIDAL CURRENTS ; FRESH-WATER ; PLUME ; CIRCULATION ; MODELS ; WIND ; FLOW
WOS研究方向	Oceanography
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000290747100013
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/25107]
专题	自然资源部第一海洋研究所
通讯作者	Liu, Zhe
作者单位	1.Ocean Univ China, Minist Educ, Key Lab Marine Environm & Ecol, Qingdao 266100, Peoples R China 2.E China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R China 3.State Ocean Adm, Lab Marine Spill Oil Identificat & Damage Assessm, Qingdao 266033, Peoples R China 4.State Ocean Adm, Org N China Sea Monitoring Ctr, N China Sea Branch, Qingdao 266033, Peoples R China 5.Ehime Univ, Ctr Marine Environm Studies, Matsuyama, Ehime 7908577, Japan
推荐引用方式 GB/T 7714	Wang, Yucheng,Liu, Zhe,Gao, Huiwang,et al. Response of salinity distribution around the Yellow River mouth to abrupt changes in river discharge[J]. CONTINENTAL SHELF RESEARCH,2011,31(6):685-694.
APA	Wang, Yucheng,Liu, Zhe,Gao, Huiwang,Ju, Lian,&Guo, Xinyu.(2011).Response of salinity distribution around the Yellow River mouth to abrupt changes in river discharge.CONTINENTAL SHELF RESEARCH,31(6),685-694.
MLA	Wang, Yucheng,et al."Response of salinity distribution around the Yellow River mouth to abrupt changes in river discharge".CONTINENTAL SHELF RESEARCH 31.6(2011):685-694.