Vortex dynamics in the studies of looping in tropical cyclone tracks

doi:10.1016/S0169-5983(96)00056-1

IMECH-IR > 力学所知识产出(1956-2008)

	Vortex dynamics in the studies of looping in tropical cyclone tracks
	Li JC(李家春); Kwok YK; Fung JCH
发表期刊	Fluid Dynamics Research
	1997
卷号	21 期号:1 页码:57-71
ISSN	0169-5983
摘要	This paper proposes criteria for predicting the tendency of looping in tropical cyclone tracks using the approach of vortex dynamics. We model the asymmetric structure of a cyclone by a system of vortex patches. The evolution of such system of vortices is simulated by the method of contour dynamics. A new set of exact analytic formulas for contour dynamics calculations is derived, which is shown to be more computationally effective. Based on point-vortex models, we derive analytic formulas for the criteria of looping in a cyclone track. From numerical experiments, the simulated trajectories obtained from the point-vortex system and vortex patch system agree quite well. Hence, the looping criteria obtained from the point-vortex system can be applied by forecasters to stay alert for tendency of looping in a cyclone track. To demonstrate the applicability of the proposed criteria, the trajectory of Typhoon Yancy (9012), whose field data are available from ''TCM-90'', is simulated. The case study shows that the asymmetric structure similar to the pattern of a beta gyre is responsible for its recurvature when Yancy landed Fujian Province, China on 20 August 1990.
关键词	Tropical Cyclone Anomalous Track Contour Dynamics Beta Gyres Asymmetric Structure Contour Dynamics Scale Vortices Euler Equations Motion
DOI	10.1016/S0169-5983(96)00056-1
收录类别	SCI
语种	英语
WOS记录号	WOS:A1997XC63600004
关键词[WOS]	CONTOUR DYNAMICS ; SCALE VORTICES ; EULER EQUATIONS ; MOTION
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/39034
专题	力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Li JC,Kwok YK,Fung JCH. Vortex dynamics in the studies of looping in tropical cyclone tracks[J]. Fluid Dynamics Research,1997,21,1,:57-71.
APA	李家春,Kwok YK,&Fung JCH.(1997).Vortex dynamics in the studies of looping in tropical cyclone tracks.Fluid Dynamics Research,21(1),57-71.
MLA	李家春,et al."Vortex dynamics in the studies of looping in tropical cyclone tracks".Fluid Dynamics Research 21.1(1997):57-71.

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