“海棠”影响河南降水雷达回波和中尺度雨团对比分析  

Contrastive Analysis between Radar Echoes and Mesoscale Rain Clusters of Henan Precipitation Influenced by Typhoon Haitang

作　　者：牛淑贞 张一平 王国安 席世平 

机构地区：[1]河南省气象台,郑州450003

出　　处：《气象》2006年第8期30-35,i0001,共7页Meteorological Monthly

摘　　要：使用郑州714CD雷达观测资料,以及2005年刚建立起的河南省乡镇雨量站网资料,配合河南省自动站资料,对0505号台风海棠造成的河南省大范围暴雨、局部特大暴雨过程进行了分析,总结出强降水回波区早于中尺度雨团1个小时左右生成,中尺度雨团早于降水回波减弱消失,稳定少动的强降水回波有利于中尺度雨团的产生和发展;多普勒速度场上,中尺度系统存在的地方有利于强降水回波发展和维持,也有利于中尺度雨团产生和发展;受持续不断45dBz左右强降水回波影响,构成“列车效应”,可造成暴雨甚至是大暴雨过程;对于大范围降水回波,依据乡镇雨量图上中尺度雨团活动规律,分析速度场上中尺度系统如逆风区、辐合区、大风区(低空急流),可以准确预报暴雨落区,发布暴雨预警信号。Based on the data of intensity fields of 714CD Radar and Doppler velocity fields and rainfall stations net established in villages and towns of Henan Province in 2005 and the data of auto-weather stations of Henan, the heavy rainfall in Henan influenced by the Typhoon ＂Haitang＂ is analyzed. The main conclusions are as follows： （1） The appearance of the heavy precipitation echoes is earlier about one hour than the mesoscale rain cluster, but the mesoscale rain cluster weakens and disappears earlier than the radar echoes of the heavy precipitation, and steady radar echoes of heavy precipitation are benefit for the form and development of the mesoscale rain cluster; （2） On the Doppler velocity fields, the existence of mesoscale system makes for the development and maintenance of heavy precipitation radar echoes ; （3） The area, influenced continually by the heavy precipitation radar echoes about 45 dBz, can produce ＂train effect＂ and lead to rainstorm even heavy rainstorm process. For the large-scale echoes of precipitation, according to the movement rules of the mesoscale rain cluster in village-town rainfall chart, the mesoscale systems in the Doppler velocity fields, such as the adverse wind area, the convergence region, the strong wind zone （low-level jet）, can be analyzed to forecast correctly the heavy rainfall area and issue warning signal of the heavy rain.

关 键 词：中尺度雨团 强降水回波 列车效应 逆风区 辐合区 

分 类 号：P426.62[天文地球—大气科学及气象学] TP311[自动化与计算机技术—计算机软件与理论]