地形和边界层摩擦对登陆热带气旋路径和强度影响的研究  

A Study of the Influence of Topography and Boundary Layer Friction on Landfalling Tropical Cyclone Track and Intensity

作　　者：袁金南[1] 谷德军[1] 梁建茵[1] 

机构地区：[1]中国气象局广州热带海洋气象研究所,广州510080

出　　处：《大气科学》2005年第3期429-437,共9页Chinese Journal of Atmospheric Sciences

基　　金：广东省科技厅项目"珠江三角洲热带气旋暴雨预警信号发布研究";国家科技部公益重点项目2001DIA20026 01

摘　　要：采用准地转的正压模式,研究了无非绝热加热时地形和边界层摩擦对登陆热带气旋路径和强度的影响。结果表明:地形作用对登陆热带气旋西北移动路径的影响比较明显,而对登陆热带气旋强度的影响不明显;边界层摩擦可以通过改变热带气旋X方向上和Y方向上的移动速度以及改变热带气旋水平环流结构对登陆热带气旋西北移动路径产生一定的影响,边界层摩擦对登陆热带气旋强度的影响非常明显,其中摩擦是造成登陆热带气旋强度迅速减弱的一个重要因素。A quasi\|geostrophic barotropic model is employed to investigate the influence of topography and boundary layer friction on landfalling tropical cyclone tracks and intensity change without diabatic heating. The results show that the effect of topography on north\|west wards track of landfalling tropical cyclones is quite obvious, but the effect of topographic action on intensity of landfalling tropical cyclones is not distinct. On the other hand, it is also shown that the boundary layer friction may have a certain degree effect on the north\|west wards tracks of landfalling tropical cyclones by changing the moving velocity of tropical cyclone in X and Y directions and the horizontal structure of tropical cyclone circulation, and the boundary layer friction has a prominent effect on intensity of landfalling tropical cyclones. The result demonstrates that the friction action is one of the important factors to decrease rapidly the intensity of landfalling tropical cyclones.

关 键 词：地形 边界层摩擦 登陆热带气旋 路径 强度 正压模式 

分 类 号：P444[天文地球—大气科学及气象学]