关键词: 热带气旋, 摄动法, 动力学结构

Abstract: Tropical cyclone is divided into inner and outer regions in which the scale of time-space and physical quantity are all different. Making use of the scale analysis and perturbation method on the two regions of tropical cyclone the governing equations of baroclinic models are obtained respectively. The inner region is governed by cyclic wind while the outer region by gradient wind, but the governing equations are similar, they can be solved analytically by the same equations. The obtained structure of the stream and pressure fields consistents approximately with observations.

Key words: tropical cyclone, perturbation method, dynamic structure