A Model Study on the Generation of Internal Tides by Tidal Flows Over a Submerged Seamount in the Channel

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	A Model Study on the Generation of Internal Tides by Tidal Flows Over a Submerged Seamount in the Channel
	Cai, SQ ; Liu, JH ; Long, XM
刊名	COMMUNICATIONS IN COMPUTATIONAL PHYSICS
	2010
卷号	8 期号:1 页码:95-114
关键词	Internal tides numerical modeling two-layer model sill channel
ISSN号	1815-2406
通讯作者	caisq@scsio.ac.cn ; lerry710@scsio.ac.cn ; xmlong@scsio.ac.cn
中文摘要	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.
学科主题	Physics, Mathematical
收录类别	SCI
原文出处	GLOBAL SCIENCE PRESS
WOS记录号	WOS:000278713500003
公开日期	2011-07-03
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/6291]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	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[J]. COMMUNICATIONS IN COMPUTATIONAL PHYSICS,2010,8(1):95-114.
APA	Cai, SQ,Liu, JH,&Long, XM.(2010).A Model Study on the Generation of Internal Tides by Tidal Flows Over a Submerged Seamount in the Channel.COMMUNICATIONS IN COMPUTATIONAL PHYSICS,8(1),95-114.
MLA	Cai, SQ,et al."A Model Study on the Generation of Internal Tides by Tidal Flows Over a Submerged Seamount in the Channel".COMMUNICATIONS IN COMPUTATIONAL PHYSICS 8.1(2010):95-114.