SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)
Background current affects the internal wave structure of the northern South China Sea
Cai, SQ; Long, XM; Dong, DP; Wang, SG; caisq@scsio.ac.cn
2008
Source PublicationPROGRESS IN NATURAL SCIENCE
ISSN1002-0071
Volume18Issue:5Pages:585-589
AbstractThe internal wave modal equations are solved with the consideration of background currents. Analytical and numerical solutions of some specific examples, including observations in the northern South China Sea (SCS), are obtained to investigate the effect of background current on internal wave vertical structure. The effects of current shear and curvature on internal wave vertical structure are evaluated separately. It is found that the phase speed and wave structure are modified by background currents, the current shear has little effect on wave structure, whilst the current curvature could have a strong impact on the wave structure. The extent of the effect by the current curvature on the wave structure depends on the magnitudes of current curvature, relative wave speed, and buoyancy frequency, sometimes the effect by the current curvature may even cause the wave to attenuate severely with depth. A new method to obtain the real eigenfunction with depth in the case that the waves become evanescent is also put forward. It is shown that the residual tidal current in the northern SCS is strong enough to cause the wave to attenuate severely at the upper layer. (c) 2007 National Natural Science Foundation of China and Chinese Academy of Sciences. Published by Elsevier Limited and Science in China Press. All rights reserved.
Department[Cai, Shuqun; Long, Xiaomin; Dong, Danpeng; Wang, Shengan] Chinese Acad Sci, S China Sea Inst Oceanol, LED, Guangzhou 510301, Peoples R China
KeywordInternal Waves Wave Mode Current Shear Current Curvature Numerical Method South China Sea
Subject AreaMaterials Science, Multidisciplinary ; Multidisciplinary Sciences
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Indexed Bysci
Funding ProjectLED
WOS IDWOS:000255287900011
Citation statistics
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/6021
Collection热带海洋环境国家重点实验室(LTO)
Corresponding Authorcaisq@scsio.ac.cn
Recommended Citation
GB/T 7714
Cai, SQ,Long, XM,Dong, DP,et al. Background current affects the internal wave structure of the northern South China Sea[J]. PROGRESS IN NATURAL SCIENCE,2008,18(5):585-589.
APA Cai, SQ,Long, XM,Dong, DP,Wang, SG,&caisq@scsio.ac.cn.(2008).Background current affects the internal wave structure of the northern South China Sea.PROGRESS IN NATURAL SCIENCE,18(5),585-589.
MLA Cai, SQ,et al."Background current affects the internal wave structure of the northern South China Sea".PROGRESS IN NATURAL SCIENCE 18.5(2008):585-589.
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