Vortex dynamics in the studies of looping in tropical cyclone tracks
文献类型：期刊论文
| 作者 | Li JC(李家春) ; Kwok YK; Fung JCH
|
| 刊名 | Fluid Dynamics Research
 |
| 出版日期 | 1997 |
| 卷号 | 21期号:1页码:57-71 |
| 关键词 | Tropical Cyclone Anomalous Track Contour Dynamics Beta Gyres Asymmetric Structure Contour Dynamics Scale Vortices Euler Equations Motion |
| ISSN号 | 0169-5983 |
| 中文摘要 | 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. |
| 类目[WOS] | Mechanics ; Physics, Fluids & Plasmas |
| 研究领域[WOS] | Mechanics ; Physics |
| 关键词[WOS] | CONTOUR DYNAMICS ; SCALE VORTICES ; EULER EQUATIONS ; MOTION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:A1997XC63600004 |
| 公开日期 | 2009-08-03 ; 2010-08-20 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/39034]  |
| 专题 | 力学研究所_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. |
入库方式： OAI收割
来源：力学研究所
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