能量频散对台风结构和移动的作用

本文用双Ｆｏｕｒｉｅｒ展开的解析方法和β平面准地转正压模式数值试验的方法，研究了台风涡旋能量频散及其对台风路径的影响问题。解析与数值试验的结果一致地表明，由于能量频散，在台风中心以东方向形成了一个低－高－低值系统的波列。三组数值试验的结果表明，波列中的高值系统对台风的结构和移行具有明显的影响。

EFFECT OF ENERGY DISPERSION ON STRUCTURE AND MOTION OF TROPICAL CYCLONE

he structure and movement of tropical cyclone is studied using an analytical as well as a numerical model in a beta-plane nondivergent barotropic framework. The analytical model and the linear version of the numerical one give essentially the same result: the energy dispersion from tropical cyclone can creat an L-H-L wave-train in the east region of tropical cyclone. Three numerical experiments whose integration times equal to seven model days by the nonlinear model exhibit that the closed high in the wave-train produces obvious influence on the structure and track of tropical cyclone.