雷暴起电主要是通过微物理过程造成的，对于雷暴微物理结构的认识和量化有利于提高闪电预报能力。该项目申请的核心在于利用先进的性能良好的双偏振雷达研究我国江淮地区夏季雷暴微物理结构特征。在准确建立雷暴相态反演方法，和定量分析反演合理性的基础上，深入研究雷暴系统内部粒子相态结构、动力特征和演变,对比分析发生闪电和不发生闪电雷暴的差异。更好的理解雷暴微物理过程，该研究也为提高我国业务闪电的预报建立观测基础。

The Electrification of thunderstorms is based on the microphysics processes, understanding and characterization of thunderstorms microphysics are important for accurate lightning forecasts (LF). The objective of this proposal is to improve understanding microphysics of thunderstorms in Yangtze-Huaihe river basin of China in summer with polarimetric radar. On the basis of optimal radar retrieval method of hydrometeor classification, and the quantitative evaluation of error structures of retrievals, we will better understand microphysics of thunderstorms with further study on structure of hydrometeor, kinematic feature and their evolution, and comparison between lightning and non-lightning convective. This study will also help to improve the LF ability, and increasing the safety of people and property.