一次多单体降雹过程及防雹作业情况分析

Analysis of a Single Hail Process and Hail Suppression Operation Situation

利用2015年4月29日贵州一次冰雹过程的天气资料、多普勒雷达资料、作业信息资料等,分析了不同降雹类型回波的形态特征及组合反射率(CR)、垂直累积液态水含量(VIL)等参数特征,总结出此次降雹过程中多单体演变引起降雹的规律,结合实际作业情况分析了作业中存在的问题。结果表明,此次过程是由超过20个单体相继生成和消亡引起降雹的过程,降雹单体呈现一定规律,即多个对流单体中某个单体的加强和减弱能引起降雹,多个单体合并加强也能引起降雹;单体回波加强或减弱引起降雹的过程中,VIL值均较大,说明之前虽降雹,但能量未完全释放,再加上回波减弱时VIL值仍然出现跃增,说明有很好的水汽补充条件,这可能是多个对流单体中某些单体在加强-减弱-再加强过程中引起降雹的原因。这些特征及规律对今后冰雹监测预警有较好的指示作用。

The parameter characteristics such as echo morphological characteristics of different hail process, radar combination reflectivity （CR）, vertically integrated liquid（VIL） were analyzed, it was concluded the rules of hail drop caused by multi-cell evolution in this hail process based on weather data and Doppler radar data, job information, etc. of a hail process in April 29, 2015, Guizhou. Combined with practical work, the problems existed in the operation were analyzed, which can provide some useful reference for the hail suppression in the fu- ture. The results showed that the process is made up of more than 20 monmner successive generation and extinction caused hail process, hai- ling monomer has a certain regularity, namely a monomer strengthening and weakening can cause hail and a number of monomers combination can also cause hail. Single echo strengthening or weakening caused hail, the VIL value were large, indicating that energy is not fully released, and VIL value still jump when echo is weakening, indicating have good moisture replenishment conditions, which may be. causes for hail in strengthening-weakening-strengthening process of a monomer in multiple convective monomer. The characteristics and laws have good indica- ting function for monitoring and early warning of hail in the future.