非对称环流的细致结构与台风路径的摆动

应用准地转三层斜压模式数值模拟热带气旋的移动，详细分析热带气旋非对称环流的三度空间结构及其与热带气旋移动的关系。结果表明：非线性涡度平流与线性β项相结合不但可以产生大尺度β涡旋对，而且还可产生小尺度涡旋对；这两种不同尺度的非对称涡旋不断相互作用，导致热带旋移速的振荡和移向的摆动。

THE FINE STRUCTURE OF ASYMMETRICCIRCULATION AND VACILLATION IN TYPHOON TRACK

Tropical cyclone motion is numerically simulated in the context of a quasi-geostrophicthree-layer baroclinic model with detailed analysis of an asymmetric circulation and its relation tothe cvclone motion,Restilts show that combination of the linear beta term and nonlinear vorticityadvection produces gyres both of large and small scales and that the steady interaction betweenthese pairs will lead to the oscillation in speed and vacillation in direction for a tropical cyclone.