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学科主题: Physics, Mathematical
题名: A Model Study on the Generation of Internal Tides by Tidal Flows Over a Submerged Seamount in the Channel
作者: Cai, SQ ; Liu, JH ; Long, XM
通讯作者: caisq@scsio.ac.cn ; lerry710@scsio.ac.cn ; xmlong@scsio.ac.cn
关键词: Internal tides ; numerical modeling ; two-layer model ; sill channel
刊名: COMMUNICATIONS IN COMPUTATIONAL PHYSICS
发表日期: 2010
卷: 8, 期:1, 页:95-114
收录类别: sci
部门归属: [Cai, Shuqun; Liu, Junhang; Long, Xiaomin] Chinese Acad Sci, S China Sea Inst Oceanol, LED, Guangzhou 510301, Guangdong, Peoples R China; [Liu, Junhang] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
项目归属: LED
摘要: It is known that the submerged seamount/ridge is a source for the generation of internal tides. In this paper, a three-dimensional two-layer model is set up to study the generation of internal tides by tidal flows over a submerged seamount/ridge in the channel. Several numerical experiments with different topographic features, upper layer depths, tidal flows and background currents are carried out to study the variations of the induced internal tides. It is shown that, for the specific stratification, the seamount feature, the slope, the initial upper layer depth and the imposing driven force determine the Froude number near the seamount peak. Once when the Froude number is supercritical, the associated maximum amplitude of the induced internal tide is so large that the internal tide begins to disintegrate, which brings about severe variations of the current velocity and the water elevation fields, and the associated induced baroclinic tidal energy around the seamount peak is much larger than the barotropic one. The Richardson number greater than 1/4 is a criterion for stability of shear flow. Since the maximum tidal velocity changes within 0 similar to 360 degrees with time in a period around the seamount peak, the induced internal tide does not stride the seamount peak before it disintegrates, which is different from the two-dimensional modeled results. The asymmetrical slope of the submerged seamount is a mechanism for the asymmetrical internal tide generation.
原文出处: 查看原文
WOS记录号: WOS:000278713500003
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/6291
Appears in Collections:热带海洋环境动力实验室(LTO)_期刊论文

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Recommended Citation:
Cai, SQ; Liu, JH; Long, XM.A Model Study on the Generation of Internal Tides by Tidal Flows Over a Submerged Seamount in the Channel,COMMUNICATIONS IN COMPUTATIONAL PHYSICS,2010,8(1):95-114
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文件名: A Model Study on the Generation of Internal Tides by Tidal Flows Over a Submerged Seamount in the Channel.pdf
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