环境垂直风切变对0509号台风“麦莎”的影响分析  

Effects of environmental vertical wind shear on Typhoon Matsa(0509)

作　　者：李瑞[1] 李本亮[1] 胡鹏[1] 梁永礼[1] 刘爱梅[1] 

机构地区：[1]济南市气象局,山东济南250102

出　　处：《海洋学研究》2014年第2期14-22,共9页Journal of Marine Sciences

基　　金：国家自然科学基金项目资助(40775060)

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。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.

关 键 词：台风“麦莎” 强度 对流和降水结构 环境垂直风切变 

分 类 号：P444[天文地球—大气科学及气象学]