北京地区雷暴云微物理结构数值模拟及其与双偏振雷达观测对比  

Numerical Simulation of Microphysical Structures of a Severe Thunderstorm in Beijing and their Comparisons with Polarimetric Radar Observations

作　　者：谭天 肖辉[2,3] 孙跃 侯团结[2] 冯亮 闻光[2] 周筠珺[1] TAN Tian;XIAO Hui;SUN Yue;HOU Tuan-jie;FENG Liang;WEN Guang;ZHOU Yun-jun(Chengdu University of Information and Technology, Chengdu 610225, China;Key Laboratory of Cloud-Precipitation and Severe Storms, and Center of Disaster Reduction, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]成都信息工程大学大气科学学院,四川成都610225 [2]中国科学院大气物理研究所中国科学院云降水物理与强风暴重点实验室中国科学院减灾中心,北京100029 [3]中国科学院大学,北京100049

出　　处：《成都信息工程大学学报》2017年第4期409-418,共10页Journal of Chengdu University of Information Technology

基　　金：国家重点基础研究发展计划(973)资助项目(2014CB441403;2013CB430105);国家自然科学基金资助项目(41575037;41605019)

摘　　要：为了对华北地区雷暴云微物理和起电机制有更深入的认识,利用三维雷暴云动力-微物理-电耦合数值模式对2015年8月22日发生在北京东北部的一次雷暴云过程进行了数值模拟,并将模拟所得雷暴云微观结构与X波段双偏振雷达观测进行了对比分析。结果表明:模拟的雷暴云宏观结构和各水成物粒子分布与双偏振雷达观测宏观结构和根据双偏振参量反演的粒子相态分布具有较好的一致性,模拟的雷暴云宏微观结构有较好的可信度。在发展阶段雷暴云电荷结构出现为"上负下正"反偶极性,在发展阶段后期,在雷暴云上部的主负电荷区中出现了正电荷中心。在成熟阶段雷暴云中总电荷结构呈现为典型的"正-负-正"三极性特征。This paper used the three-dimensional dynamic-microphysical-electric-coupling thundercloud numerical model to make a numerical simulation of a severe thunderstorm occurred in northeastern Beijing on August 22,2015,the simulation results were compared with the hydrometeor structures retrieved by X-band polarimetric radar observation. The model simulation results are in good consistent with the X-band polarimetric radar observations in the macro-structure of thunderstorm and the distribution of hydrometeor particles in the thunderstorm.Moreover,the simulation has high reliability. Under this condition,the evolutions of the charge structureand electrification process were analyzed.The results show that in the development stage of the thunderstorm,the general charge structure in the cloud presents an inverted dipole characteristic with a ＂ negative-positive＂ polarity.And in themature stage,the general charge structure shows a normal tripole characteristic of ＂ positive-negative-positive ＂ polarity.The electrification processes are further analyzed in the paper.

关 键 词：大气物理学 雷暴云 微物理结构 双偏振雷达观测 电荷结构 起电机制 

分 类 号：P427.321[天文地球—大气科学及气象学]