一次冰雹天气过程不同站点冰雹成因分析

Analysis of Hails at Different Sites in a Hail Process

本文利用常规观测资料和山西四站雷达资料对2014年6月16日冰雹天气过程进行综合分析，研究结果表明：①本次冰雹天气过程是在高层急流核后部辐散抽吸的作用下，配合中层干冷平流的形势下发生的，低层没有丰富的水汽供应。②6月16日午后出现8站次冰雹天气，根据强对流单体的发生、发展及其移动状况，将冰雹天气发生分为以下三种情况：局地对流单体新生形成冰雹、对流单体相互作用加强形成冰雹、多单体风暴中某个对流单体加强形成冰雹。③局地对流单体新生时，如果有符合冰雹的某些回波特征（如三体散射长钉、回波悬垂、强回波高度较高、钩状回波等），很可能会形成冰雹。局地新生的对流单体遇到移动的对流系统时，新生的对流单体可能会加强发展形成冰雹等强对流单体。④对流单体之间的相互作用会导致对流的加强形成冰雹。⑤多单体风暴中形成冰雹的对流单体的回波特征中没有明显的回波悬垂。⑥在不稳定的环境场条件下，低层的中尺度系统触发了局地冰雹。

Using routing observation data and four weather radars data in Shanxi Province, the hail process was analyzed on June 16, 2014. The results are as following：（ the upper divergence fields at the rear of the jet center, w 1） ith The Hail process was caused the cold and dry advection in by the effect of suction in the middle, without watei vapor and energy supply in the lower. （2） there were 8 hails occurring during the afternoon of June 16th, according to the occurrences, its moving statuses and developments of strong convective monomers, these hails was divided into the following three cases： The hails were formed from local neonatal convective cells, formed from regenerate developing convective cells after interaction between cells, and formed from strong convective monomers among multicell storms （ 3 ） When local convective monomer borns, if it meets some echo features of hail （ such as three body scatter spike echo pendency, strong echo height, hook echo and so on） , it will be likely to form hails. If local new convective monomer meets moving convective systems, newborn convective monomer will develop severe convective hailstorm monomer. （4） The interaction between convective cells can lead the convection enhancing to form hails. （ 5 ） The convective hail monomers from enhanced convective monomers among the muhicell storm have not echo pendency feature. （ 6 ） Under the unstable environment field conditions, the surface mesoscale systems trigger local hails