Three-dimensional spiral structure of tropical cyclone under four-force balance  

作　　者：刘式适 付遵涛 刘式达 

机构地区：[1]Department of Atmospheric and Oceanic Sciences and Laboratory for Climate and Ocean–Atmosphere Studies,School of Physics, Peking University

出　　处：《Chinese Physics B》2014年第6期644-648,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Granted No.40975027)

摘　　要：The steady axis-symmetrical atmosphere dynamical equations are used for describing spiral structure of tropical cyclones under four-force （pressure gradient force, Coriolis force, centrifugal force, and friction force） balance, and the dynamical systems of three-dimensional （3D） velocity field are introduced. The qualitative analysis of the dynamical system shows that there are down 3D spiral structures in eye of tropical cyclone and tropical cyclone is 3D counterclockwise up spiral structure. These results are consistent with the observed tropical cyclone on the weather map.The steady axis-symmetrical atmosphere dynamical equations are used for describing spiral structure of tropical cyclones under four-force （pressure gradient force, Coriolis force, centrifugal force, and friction force） balance, and the dynamical systems of three-dimensional （3D） velocity field are introduced. The qualitative analysis of the dynamical system shows that there are down 3D spiral structures in eye of tropical cyclone and tropical cyclone is 3D counterclockwise up spiral structure. These results are consistent with the observed tropical cyclone on the weather map.

关 键 词：tropical cyclones spiral structure dynamical systems four-force balance 

分 类 号：O414.1[理学—理论物理]