多普勒天气雷达资料在一次雨雪天气过程中的应用分析  

ANALYSIS AND APPLICATION OF DOPPLER WEATHER RADAR DATA IN A RAIN AND SNOW COURSE

作　　者：吴海英[1] 曾明剑[1] 蒋义芳[1] 王卫芳[1] 王凌震[1] 

机构地区：[1]江苏省气象台,南京210008

出　　处：《气象科学》2007年第2期208-213,共6页Journal of the Meteorological Sciences

基　　金：国家自然科学基金项目(编号:40475017)资助

摘　　要：利用多普勒天气雷达资料,对2004年12月21—23日发生在江苏的一次雨雪天气过程进行了研究,分析了雨雪发展的不同阶段,基本反射率场、基本速度场及降水系统风场和散度场垂直结构的演变特征,结果显示:降水云体中风场的调整往往预示着降水未来的演变,系统内部动力场结构的变化与降水的发生发展及消亡相联系。Using the Doppler weather radar data,this paper studies a rain and snow weather process occurred in Jiangsu province from 21 to 23 December 2004, and analyzes the variation characteristics of base reflectivity field,base velocity field and vertical structure of wind field and divergence field in the pre- cipitation system in the process of development of precipitation. The results show that adjustment of wind field in the precipitation cloud often predicts the variation of rain, and the change of dynamical structure of precipitation system is associated with the evolution of precipitation.

关 键 词：多普勒天气雷达 基本反射率 基本速度VAD风廓线 散度 

分 类 号：P458[天文地球—大气科学及气象学]