柳州夏季一次雨夹冰雹的天气过程分析

Analysis of a Rain and Hail Mixed Weather Process in Summer of Liuzhou

利用常规地面观测、柳州地面自动站、FY-2C卫星、柳州和河池的多普勒天气雷达观测资料,对2014年7月22日夏季柳州发生的一次短暂的雨夹冰雹天气过程的环境条件和雷达产品特征进行分析,主要结果如下:受副高和台风外围气流影响,柳州全市出现了37℃以上大范围的高温天气,天气尺度和中尺度的上升运动较弱,局地性质的加热作用导致大气的不稳定度加强而诱发对流云系进一步发展造成的;雷达显示的冰雹云的最大基本反射率因子为65d BZ,强回波区面积小;风速的切变和辐合上升运动小,0℃层高度较高,不利于对流系统的发展和维持。

Based on data of surface meteorological observation, automatic weather station, FY-2C satellite and the Doppler radar of Liuzhou and Hechi, weather conditions and characteristics of radar products of a rain and hail mixed weather process happened on July 22, 2014 in Summer of Liuzhou were analyzed. The main results show that： influenced by the subtropical high and peripheral airflow of typhoon, the weather of large-scale high temperatures above 37 degrees appeared in Liuzhou.. The Doppler radar products showed that the maximum basic reflectivity radar of hail cloud is 65dBZ with small area of strong echo. The small wind shear and convergence ascending motion, and a high height of 0℃ were not conducive to the development and maintenance of the convective system.