中文摘要：

利用多种卫星观测资料和NCEP/NCAR提供的风场资料等,分析了环境垂直风切变对0509号台风＂麦莎＂的强度、对流和降水结构的影响。结果表明：在台风＂麦莎＂整个生命史中,垂直风切变与其强度之间关系非常密切,但垂直风切变不是影响其强度变化的唯一因素;＂麦莎＂登陆前及登陆后在垂直风切变作用下,强对流和强降水均位于顺切变方向及其左侧,对流和降水呈1阶非对称分布。

英文摘要：

The effects of environmental vertical wind shear（VWS）on the intensity,convection and precipitation asymmetries in Typhoon Matsa（0509）were analyzed based on the satellite observation data from various sources and NCEP/NCAR reanalysis wind.The results show that before and after Matsa＇s landfall,there is very close relationship between the VWS and Matsa＇s intensity,but the VWS is not a sole factor for Matsa＇s intensity variability.The VWS has a great impact on the asymmetric distribution of Matsa＇s convection and precipitation before and after its landfall.Heavy convection and rainfall generally occurr downshear to downshear-left of the VWS vector,showing a strong wavenumber-1asymmetry.