2007年8月2日郑州大暴雨过程分析

利用探空资料、Tbb资料及郑州新一代天气雷达产品等,对2007年8月2日发生在郑州市的短时大暴雨过程进行了分析,结果表明:此次郑州短时大暴雨在高空低槽和中低层低涡、切变线共同影响的有利大尺度环境条件下,产生在高温高湿的辐合中心,上干冷下暖湿的对流性不稳定大气层结为此次短时大暴雨提供了大量的位势不稳定能量;此次短时大暴雨是超级单体风暴产生的,新一代天气雷达产品中基本反射率和径向速度产品都具有明显特征;卫星云图上Tbb低值区及强对流云团与强降水中心相对应。

Analysis of a Heavy Storm Process in Zhengzhou on August 2nd of 2007

By utilizing sounding, Tbb and CINRAD product data, the paper analyzed the short-term heavy storm process happening in Zhengzhou on August 2nd of 2007. The result showed that the short-term heavy storm happened in the upper level trough, middle-low level low vortex and shear line which were the advantaged large scale environment conditions and came into being the convergence center of high humidity and high temperature. The convective unstable atmospheric stratification in which the upside was dry and cold and the downside was damp and warm supplied much unstable energy for the short-term heavy storm. It was found that the short-term heavy storm came from a precipitation supercell storm, the base reflectivity and radial velocity product of the CINRAD product have obvious character. It was seen that the Tbb low value area and strong convective cloud corresponded with the heavy precipitation center.