| 北京夏季强雷暴降水回波结构与闪电特征个例分析 |
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| 引用本文： | 沈永海,苏德斌,刘锦丽,段树,吕达仁,王振会.北京夏季强雷暴降水回波结构与闪电特征个例分析[J].南京气象学院学报,2010,33(5):582-592. |
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| 作者姓名： | 沈永海 苏德斌 刘锦丽 段树 吕达仁 王振会 |
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| 作者单位： | [1]南京信息工程大学大气物理学院,江苏南京210044 [2]中国科学院大气物理研究所中层大气与全球环境探测重点实验室,北京100029 [3]北京市气象局,北京100089 |
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| 基金项目： | 公益性行业(气象)科研专项，中国科学院知识创新工程重要方向项目 |
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| 摘 要： | 利用北京市气象局短时临近交互预报系统（VIPS）资料，对2008年奥运会期间两次强降水天气过程雷达回波结构及闪电时空特征进行了细致分析。结果表明，局地性强雷暴降雨天气中，降雨率峰值与闪电活动峰值关系有超前也有略滞后的情况；关于云闪和地闪出现时间，云闪一般要超前地闪5～15min；强降水回波单体中，总闪电次数的70％以上出现在大于40dBZ的强回波区，当最大回波强度大于60dBZ时，云闪出现在强回波区的概率接近90％，说明回波强度越强，云闪出现在强回波区的概率越大；对云闪与雷达回波垂直结构分析发现，强降水单体中云闪发生的高度主要在6km以上，且云闪发生频数峰值出现在8～11km高度。
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| 关 键 词： | 强降水 闪电活动 雷达回波结构 |
Case Study of the Structures of Radar Precipitation Echo and the Features of Lightning in Thunderstorms over Beijing in Summer |
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| SHEN Yong-hai,SU De-bin,LIU Jin-li,DUAN Shu,Lü Da-ren,WANG Zhen-hui.Case Study of the Structures of Radar Precipitation Echo and the Features of Lightning in Thunderstorms over Beijing in Summer[J].Journal of Nanjing Institute of Meteorology,2010,33(5):582-592. |
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| Authors: | SHEN Yong-hai SU De-bin LIU Jin-li DUAN Shu Lü Da-ren WANG Zhen-hui |
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| Institution: | 1 School of Atmospheric Physics, NUIST,Nanjing 210044, China;2. Key Laboratory for Middle Atmosphere and Global Environment Observation ( LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; 3. Beijing Meteorological Bureau, Beijing 100089, China) |
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| Abstract: | By using the Very-short-range Interactive Prediction System （VIPS） data from Beijing Meteorological Bureau, the structures of radar echo and the spatial-temporal characteristics of the lightning activities in two strong thunderstorms during the Beijing Olympic Games in the summer of 2008 were analyzed in details. The result showed that the peak of the rainfall rate occurred ahead of or a little be- hind the peak of the flash rate. The appearance of Intra-Cloud flashes （IC） was generally 5--15 mi- nutes ahead of the Cloud-to-Ground flashes （CG）. In the strong thunderstorm cells, more than 70% of the total flashes occurred in areas where radar composite reflectivities （CR） were larger than 40 dBZ. When the maximum reflectivity values exceeded 60 dBZ, the probability of IC occurring in strong radar echo areas may approach 90%. It means that the stronger the radar reflectivity is ,the more probable IC occurs in strong radar echo areas. The analysis of IC and the vertical radar echo profile revealed that the heights of the IC were mainly above 6km, and the altitudes of peak flash rate were between 8 and llkm. |
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| Keywords: | strong rainfall lightning activity radar echo structure |
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