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学科主题: Materials Science, Multidisciplinary; Multidisciplinary Sciences
题名: Background current affects the internal wave structure of the northern South China Sea
作者: Cai, SQ ; Long, XM ; Dong, DP ; Wang, SG
通讯作者: caisq@scsio.ac.cn
关键词: internal waves ; wave mode ; current shear ; current curvature ; numerical method ; South China Sea
刊名: PROGRESS IN NATURAL SCIENCE
发表日期: 2008
卷: 18, 期:5, 页:585-589
收录类别: sci
部门归属: [Cai, Shuqun; Long, Xiaomin; Dong, Danpeng; Wang, Shengan] Chinese Acad Sci, S China Sea Inst Oceanol, LED, Guangzhou 510301, Peoples R China
项目归属: LED
摘要: The 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.
原文出处: 查看原文
WOS记录号: WOS:000255287900011
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/6021
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

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Cai, SQ; Long, XM; Dong, DP; Wang, SG.Background current affects the internal wave structure of the northern South China Sea,PROGRESS IN NATURAL SCIENCE,2008,18(5):585-589
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