多普勒天气雷达速度场特征及在人工增雨中的应用  

Analyses of radar radial velocity and application in precipitation enhancement operation

作　　者：李红斌[1] 胡志群[2] 张家伟[1] 何玉科[1] 濮文耀[1] 

机构地区：[1]大连市人工影响天气办公室,辽宁大连116001 [2]中国气象局气象科学研究院,北京100081

出　　处：《气象科学》2009年第4期564-568,共5页Journal of the Meteorological Sciences

基　　金："火箭人工增雨流动作业决策指挥系统"推广应用项目(CMATG2006M47)

摘　　要：对大连2003—2005年降水天气过程的多普勒雷达速度场资料进行统计和分析,得到几种雷达回波速度场特征对降水变化及人工增雨作业的影响,总结了雷达回波速度场的零速度线呈"S"型、"弓"型和速度不对称型几种常见的分布特征对人工增雨潜力分析和作业条件判别的辅助判据指标。并结合EVAD技术和变分法定量计算大气平均散度和垂直速度方法,对大连2006年夏季一次人工增雨作业过程进行了分析,得到了回波速度场特征与计算的平均散度和垂直速度的较好的配合关系。By statistical analysis of Doppler radar velocity field data of rainfall processes from June 2003 to October 2005 at Dalian district, the indications of several familiar echo velocity characters of the cloud systems developing into rainfall were obtained. Several criterions were concluded for analyzing the precipitation potential region and the opportunity for precipitation enhancement operation while radar echo showed ＂s＂ or bow shape. Combined with EVAD technique and variation to calculate average divergence and vertical velocity, the practical validation showed good results in a precipitation enhancement operation at Dalian district in summer 2006, in that ease, the PPI velocity field showed ＂s＂ shape and matched well to the average divergence and vertical velocity.

关 键 词：雷达径向速度 增雨作业 决策分析 

分 类 号：P481[天文地球—大气科学及气象学]