东移偶极子与台风涡旋的相互作用  

INTERACTION BETWEEN EASTWARDS MOVING DIPOLES AND TYPHOONS

作　　者：罗哲贤[1] 

机构地区：[1]南京气象学院

出　　处：《气象学报》1998年第5期594-601,共8页Acta Meteorologica Sinica

基　　金：国家自然科学基金

摘　　要：用β平面准地转正压模式实施８组试验，分析东移偶极子与台风涡旋的相互作用。结果指出：这种相互作用可以引起台风环流１波非对称结构向２波非对称结构的转换；引起台风涡旋随时间衰减的速度显著变慢；引起沿西北方向移动的正常路径向北折转向或打转等异常路径的转化。In order to study the interaction between eastwards moving dipoles and typhoons, eight numerical experiments are performed with a beta plane quasigeostrophic barotropic vorticity equstion model. Results show that the interaction can creat the transformation from the typhoon asymmetric structure with one wavenumber to that with two wavenumber, that it can decrease the rate obvioursly at which the intensity of typhoons decays, and that it can also induce the transition from typhoon normal tracks to unnormal ones, such as the abrupt northeastward recurving or anticlockwise moving and so on.

关 键 词：偶极子 热带气旋 涡旋 相互作用 台风 

分 类 号：P444[天文地球—大气科学及气象学]