河北暴雨的多普勒天气雷达径向速度特征  

Characteristics of Doppler Rader Velocity Field in Severe Rainstorms in Hebei

作　　者：王福侠 俞小鼎[2] 王宗敏 裴宇杰 闫雪瑾 

机构地区：[1]河北省气象台,石家庄050021 [2]中国气象局培训中心,北京100081

出　　处：《气象》2014年第2期206-215,共10页Meteorological Monthly

基　　金：公益性行业(气象)科研专项(GYHY200906011;GYHY20070604);国家科技支撑项目(2008BAC37B01)共同资助

摘　　要：利用2004—2011年29次暴雨过程的多普勒天气雷达资料和常规天气资料,分类总结了河北中南部暴雨的主要雷达径向速度特征。发现形成河北中南部暴雨的主要雷达径向速度特征有5类:β中尺度辐合线、β中尺度辐合、γ中尺度辐合、高空急流和深厚持久的低空急流。深厚持久的低空急流是大范围暴雨的主要速度特征之一。高空急流是大范围暴雨和区域暴雨共有的速度特征。β中尺度辐合线、β中尺度辐合、γ中尺度辐合是大范围暴雨、区域暴雨和局地暴雨共有的速度特征和主要的中小尺度影响系统。列车效应是造成局地暴雨、大暴雨的关键原因。By using the Doppler radar data and the conventional observation of 29 torrential rain processes from 2004 to 2010 the velocity field characteristics in rainstorms in south-central Hebei Province are ana lyzed. It is found that the characteristics can be divided into five categories, including the meso- scale con- vergence line, the meso- scale convergence, the meso-＇ scale convergence, the upper-level jet and the long-lasting and deep low-level jet. The last one is one of the main velocity field features of large-range se- vere rainstorms. The upper-level jet is the characteristic of both large-range heavy rainstorms and regional heavy rainstorms. The meso-β scale convergence line, the meso-13 scale convergence and the meso-T scale convergence are common features and main meso scale systems of all the three types of severe rainstorms. In addition, train effects is a key cause of local severe torrential rains.

关 键 词：暴雨 多普勒天气雷达 径向速度特征 中尺度系统 

分 类 号：P415[天文地球—大气科学及气象学]