Monthly variation of some parameters about internal solitary waves in the South China sea
Cai, SQ; Xie, JS; Xu, JX; Wang, DX; Chen, ZW; Deng, XD; Long, XM; caisq@scsio.ac.cn
2014
发表期刊DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
ISSN0967-0637
卷号84页码:73-85
摘要In this paper, by non-dimensional analysis, it is found that finite-depth theory is more appropriate to the study of internal solitary waves (ISWs) in the South China Sea (SCS) than shallow-water theory. The 1-degree grid data of monthly mean temperature and salinity data at standard levels in the SCS are used to solve the linearized vertical eigenvalue problem. The nonlinear parameter and the wave phase speed are computed, then the nonlinear phase speed and the characteristic half-width of ISWs are calculated respectively by two different theories to investigate the difference between these two parameters in the SCS. The nonlinearity is the strongest near the continental slope of the SCS or islands where the bottom topography changes sharply, it is stronger in summer than that in winter; it increases (decreases) as pycnocline depth deepens (shallows), stratification strengthens (weakens) and pycnocline thickness thins (thickens). The nonlinear wave phase speed and the characteristic half-width are the largest in deep sea area, they then reduce peripherally in shallower water. The nonlinear wave phase speed in the SCS changes slightly with time, but the characteristic half-width changes somewhat larger with time. In most of the SCS basin, the nonlinear wave phase speed derived from shallow-water theory is very close to that derived from finite-depth theory, but the characteristic half-width derived from shallow-water theory is about 0.2-0.6 times larger than that derived from finite-depth theory. The ISW induced horizontal current velocity derived from shallow-water theory is larger than that derived from finite-depth theory. Some observed and numerical modeled ISW characteristic half-widths are compared with those derived from shallow-water and finite-depth theories, respectively. It is shown that, the characteristic half-widths derived from finite-depth theory agree better with observational and numerical modeled results than those derived from shallow-water theory in most cases, finite-depth theory is more applicable to the estimation of ISW characteristic half-widths in the northern SCS. It is also suggested that, to derive the precise ISW parameters in further study, the physical non-dimensional ratios which are related with ISW characteristic half-width, amplitude, thermodine and water depths should be calculated, so that an appropriate theory can be chosen for estimation. (C) 2013 Elsevier Ltd. All rights reserved.
部门归属[Cai, Shuqun ; Xie, Jieshuo ; Xu, Jiexin ; Wang, Dongxiao ; Chen, Zhiwu ; Deng, Xiaodong ; Long, Xiaomin] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China ; [Xie, Jieshuo ; Xu, Jiexin ; Deng, Xiaodong] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
关键词Nonlinear Waves Internal Solitary Waves Non Linearity Finite-depth Theory Kortweg Devries Equation South China Sea
学科领域Oceanography
资助者Special Fund of Strategic Leading Science and Technology from Chinese Academy of Sciences [XDA11020201]; National Basic Research Program [2013CB956101, 2011CB013701]; NSFC [41025019]; Knowledge Innovation Program of the Chinese Academy of Sciences [SQ201107]; Guangdong Natural Science Foundation [S2012040008082] ; Special Fund of Strategic Leading Science and Technology from Chinese Academy of Sciences [XDA11020201]; National Basic Research Program [2013CB956101, 2011CB013701]; NSFC [41025019]; Knowledge Innovation Program of the Chinese Academy of Sciences [SQ201107]; Guangdong Natural Science Foundation [S2012040008082] ; Special Fund of Strategic Leading Science and Technology from Chinese Academy of Sciences [XDA11020201]; National Basic Research Program [2013CB956101, 2011CB013701]; NSFC [41025019]; Knowledge Innovation Program of the Chinese Academy of Sciences [SQ201107]; Guangdong Natural Science Foundation [S2012040008082] ; Special Fund of Strategic Leading Science and Technology from Chinese Academy of Sciences [XDA11020201]; National Basic Research Program [2013CB956101, 2011CB013701]; NSFC [41025019]; Knowledge Innovation Program of the Chinese Academy of Sciences [SQ201107]; Guangdong Natural Science Foundation [S2012040008082]
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收录类别sci
资助项目LTO
资助者Special Fund of Strategic Leading Science and Technology from Chinese Academy of Sciences [XDA11020201]; National Basic Research Program [2013CB956101, 2011CB013701]; NSFC [41025019]; Knowledge Innovation Program of the Chinese Academy of Sciences [SQ201107]; Guangdong Natural Science Foundation [S2012040008082] ; Special Fund of Strategic Leading Science and Technology from Chinese Academy of Sciences [XDA11020201]; National Basic Research Program [2013CB956101, 2011CB013701]; NSFC [41025019]; Knowledge Innovation Program of the Chinese Academy of Sciences [SQ201107]; Guangdong Natural Science Foundation [S2012040008082] ; Special Fund of Strategic Leading Science and Technology from Chinese Academy of Sciences [XDA11020201]; National Basic Research Program [2013CB956101, 2011CB013701]; NSFC [41025019]; Knowledge Innovation Program of the Chinese Academy of Sciences [SQ201107]; Guangdong Natural Science Foundation [S2012040008082] ; Special Fund of Strategic Leading Science and Technology from Chinese Academy of Sciences [XDA11020201]; National Basic Research Program [2013CB956101, 2011CB013701]; NSFC [41025019]; Knowledge Innovation Program of the Chinese Academy of Sciences [SQ201107]; Guangdong Natural Science Foundation [S2012040008082]
WOS记录号WOS:000329960000007
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/10579
专题热带海洋环境国家重点实验室(LTO)
通讯作者caisq@scsio.ac.cn
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Cai, SQ,Xie, JS,Xu, JX,et al. Monthly variation of some parameters about internal solitary waves in the South China sea[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2014,84:73-85.
APA Cai, SQ.,Xie, JS.,Xu, JX.,Wang, DX.,Chen, ZW.,...&caisq@scsio.ac.cn.(2014).Monthly variation of some parameters about internal solitary waves in the South China sea.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,84,73-85.
MLA Cai, SQ,et al."Monthly variation of some parameters about internal solitary waves in the South China sea".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 84(2014):73-85.
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