中国科学院南海海洋研究所机构知识库
Advanced  
SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)  > 期刊论文
学科主题: Oceanography
题名: Interaction of a river plume with coastal upwelling in the northeastern South China Sea
作者: Gan, JP ; Li, L ; Wang, DX ; Guo, XG
通讯作者: magan@ust.hk
关键词: Coastal upwelling ; River plume ; Buoyancy forcing
刊名: CONTINENTAL SHELF RESEARCH
发表日期: 2009
卷: 29, 期:4, 页:728-740
收录类别: sci
部门归属: [Gan, Jianping] Hong Kong Univ Sci & Technol, Dept Math, Kowloon, Hong Kong, Peoples R China; [Gan, Jianping] Hong Kong Univ Sci & Technol, Atmospher Marine & Coastal Environm Program, Kowloon, Hong Kong, Peoples R China; [Li, Li; Guo, Xiaogang] State Ocean Adm, Inst Oceanog 3, Xiamen, Peoples R China; [Wang, Dongxiao] Chinese Acad Sci, LED, S China Sea Inst Oceanog, Guangzhou, Guangdong, Peoples R China
项目归属: LED
摘要: Observational and modeling studies were conducted to investigate the Pearl River plume and its interaction with the southwesterly driven upwelling circulation in the northern South China Sea during the summer. After exiting the Pearl River Estuary, the discharged freshwater generates a nearly Stationary bulge of freshwater near the entrance of the estuary. Forced by the wind-driven coastal upwelling current, the freshwater in the outer part of the bulge flows downstream at the speed of the current and forms a widening and deepening buoyant plume over the shelf. The plume axis gradually shifts offshore of the Current maximum as a result of currents induced by the contrasting density at the nose Of plume and by the intensified Ekman drift in the Plume. In this plume-current system, the fraction of the discharged freshwater volume accumulated in the bulge reaches a steady state and the Volume of newly discharged freshwater is transported downstream by the upwelling Current. Enhancement of stratification by the plume thins the Surface frictional layer and enhances the cross-shelf circulation in the upper water column such that the surface Ekman current and compensating flow beneath the plume are amplified while the shoaling of the deeper dense water in the upwelling region changes minimally. The pressure gradient generated between the buoyant plume and ambient seawater accelerates the wind-driven Current along the inshore edge of the plume but retards it along the offshore edge. Along the plume, downward momentum advection is strong near the highly nonlinear Source region and a weaker upward momentum advection occurs in the far field over the shelf. Typically, the plume is shaped by the current over the shelf while the Current itself is adjusting to a new dynamic balance invoked by the plume-induced changes of vertical viscosity and the horizontal pressure gradient. The spatial variation of this new balance leads to a coherent change in the cross-isobath transport in the upper water column during upwelling. (C) 2008 Elsevier Ltd. All Fights reserved.
原文出处: 查看原文
WOS记录号: WOS:000264910200004
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/6133
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

Files in This Item: Download All
File Name/ File Size Content Type Version Access License
InteractionofariverplumewithcoastalupwellinginthenortheasternSouth.pdf(3817KB)----开放获取--View Download

Recommended Citation:
Gan, JP; Li, L; Wang, DX; Guo, XG.Interaction of a river plume with coastal upwelling in the northeastern South China Sea,CONTINENTAL SHELF RESEARCH,2009,29(4):728-740
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Gan, JP]'s Articles
[Li, L]'s Articles
[Wang, DX]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Gan, JP]‘s Articles
[Li, L]‘s Articles
[Wang, DX]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: InteractionofariverplumewithcoastalupwellinginthenortheasternSouth.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2017  中国科学院南海海洋研究所 - Feedback
Powered by CSpace