Enhanced mixing induced by internal solitary waves in the South China Sea
Xu, JX; Xie, JS; Chen, ZW; Cai, SQ; Long, XM; caisq@scsio.ac.cn
2012
发表期刊CONTINENTAL SHELF RESEARCH
ISSN0278-4343
卷号49页码:34-43
摘要In this paper, based on the limited observational data of the internal solitary waves (ISWs) near the Dongsha Islands in the northern South China Sea (SCS), the temporal and spatial enhanced mixing during the passage of ISWs is discussed. It is found that, when ISWs pass, the mixing rate increases largely. The variation of the time-averaged vertical current shear agrees well with the KdV equation theory, indicating a minimum shear near the background main thermocline. In the upper layer, when the ISWs arrive, the maximum turbulent dissipation rate and the diapycnal mixing rate can increase by three orders of magnitude; after the passage of ISWs, the mixing reduces sharply to a normal magnitude as that before the arrival of the ISWs. In the upper layer, two types of the instantaneous enhanced mixing versus depth are categorized, one type has several enhanced mixing peaks at different depths when the ISW is about to arrive or to leave, and the other type has only one enhanced mixing peak. In general, the maximum instantaneous enhanced mixing occurs at depths about 10-50 m above the disturbed thermocline. The mixing rate increases largely when the gradient Richardson number is less than 1/4, indicating that the shear instability might be a vital mechanism to the local mixing; and it is interesting to find that, the enhanced mixing occurs when the Froude number approximately equals critical value of unity. (C) 2012 Elsevier Ltd. All rights reserved.
部门归属[Xu, Jiexin; Xie, Jieshuo; Chen, Zhiwu; Cai, Shuqun; Long, Xiaomin] Chinese Acad Sci, S China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Xu, Jiexin; Xie, Jieshuo] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
关键词Internal Solitary Waves Mixing Rate Kdv Equation South China Sea
学科领域Oceanography
语种英语
资助项目LTO
WOS记录号WOS:000312466900004
引用统计
被引频次:11[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/344004/10085
专题热带海洋环境国家重点实验室(LTO)
通讯作者caisq@scsio.ac.cn
推荐引用方式
GB/T 7714
Xu, JX,Xie, JS,Chen, ZW,et al. Enhanced mixing induced by internal solitary waves in the South China Sea[J]. CONTINENTAL SHELF RESEARCH,2012,49:34-43.
APA Xu, JX,Xie, JS,Chen, ZW,Cai, SQ,Long, XM,&caisq@scsio.ac.cn.(2012).Enhanced mixing induced by internal solitary waves in the South China Sea.CONTINENTAL SHELF RESEARCH,49,34-43.
MLA Xu, JX,et al."Enhanced mixing induced by internal solitary waves in the South China Sea".CONTINENTAL SHELF RESEARCH 49(2012):34-43.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Enhanced mixing indu(1604KB) 开放获取--请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。