中文摘要：

为了进一步探究贵州地区冰雹云的形成、发展机制和冰雹增长的微物理转化条件,运用三维冰雹云模式对该地区2012—2015年12个冰雹个例进行数值模拟研究,结果发现：各种水成物有利的空间分布是雹粒增长的物质基础,且上升气流与水汽相变之间存在一个正反馈效应,冰雹粒子主要以霰粒子为胚胎进行增长,增长方式以霰自动转化成雹为主。在再生冰雹云发展过程中,雹云首次发展过程结束时,高空仍维持4 km及以下很低的0℃层高度,是再生冰雹云发展的热力环境条件。降雹区地面气流辐散,导致两侧区域形成较强的气流辐合上升,是再生冰雹云发展的动力条件。气流在辐合的同时,又使原降雹区的水汽源源不断地向两侧气流辐合区汇合,是再生冰雹云发展的水汽来源。冰雹云中冰晶和霰粒子含量的迅速增加,为冰雹的再次增长提供了有利的微物理物质转化条件。

英文摘要：

To further explore the formation and development of hail cloud in Guizhou Region and the transformation mechanism of microphysical conditions during the growing process of hail,12 hail cases during2012-2015 are studied through numerical simulation using three-dimensional hail cloud model.The results show that：all kinds of water into the spatial distribution of hail is the material basis of the hail growth,and rising air and water vapor phase change with a positive feedback effect.The hail particles grow mainly taking graupel particles as embryo,and growth mode is given priority to sleet automatic conversion.In the process of continuous development of hail,hail cloud at the end of the first developing process,there is still 0℃ layer with 4 km or lower thickness which is the thermal environmental condition for the development of hail cloud again.In the hail area the surface airflow are divergent,leading to the formation of stronger updraft convergence on both sides,which is dynamic conditions for the development of hail cloud again.At the same time,the air convergence makes the water vapor the original hail air continuously flow into the air convergence zone on both sides,which becomes water vapor source of the hail cloud development.The rapid increase of ice crystals and graupel particles in the hail cloud provides favorable microphysical material conditions for the growth of hail again.