| 暴雨和雹暴个例中闪电特征对比 |
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| 引用本文： | 王婷波,郑栋,周康辉,张义军,徐良韬.暴雨和雹暴个例中闪电特征对比[J].应用气象学报,2017,28(5):568-578. |
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| 作者姓名： | 王婷波 郑栋 周康辉 张义军 徐良韬 |
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| 作者单位： | 1.中国气象局气象干部培训学院, 北京 100081 |
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| 摘 要： | 暴雨与雹暴过程中对应的闪电活动特征显著不同，为了对比这两类对流过程中的闪电活动特征差异，该文选取了两种比较有代表性的雷暴个例——暴雨过程和雹暴过程，利用全闪（包括云闪与地闪）定位数据，分析了两者闪电活动特征以及闪电活动与对流降水之间的关系。研究发现:暴雨过程中地闪频次和正地闪比例均低于雹暴过程；相对于暴雨过程，雹暴过程的主正电荷区放电高度更高，主正电荷区所处的温度偏低；暴雨过程中，总闪频次与对流降水量、总闪频次与对流降水强度的相关性均优于雹暴过程。总体而言，雹暴过程中闪电活动特征及其与降水的关系更为复杂，这可能与雹暴过程具有更为复杂的动力和冰相过程有关。
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| 关 键 词： | 闪电 降水 暴雨 雹暴 |
| 收稿时间： | 2017/1/3 0:00:00 |
| 修稿时间： | 2017/7/18 0:00:00 |
Contrastive Analysis of Lightning Characteristics Between Rainstorm Case and Hailstorm Case |
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| Wang Tingbo,Zheng Dong,Zhou Kanghui,Zhang Yijun and Xu Liangtao.Contrastive Analysis of Lightning Characteristics Between Rainstorm Case and Hailstorm Case[J].Quarterly Journal of Applied Meteorology,2017,28(5):568-578. |
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| Authors: | Wang Tingbo Zheng Dong Zhou Kanghui Zhang Yijun and Xu Liangtao |
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| Institution: | 1.China Meteorological Administration Training Center, Beijing 1000812.State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 1000813.National Meteorological Center, Beijing 100081 |
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| Abstract: | Two kinds of classic convective systems in and around Beijing are picked to investigate the lightning activities (observed by SAFIR3000) and the relationship between lightning and precipitation (retrieved from radar) during different thunderstorms. Lightning activity characteristics of a rainstorm and a hailstorm are analyzed and compared. Due to different microphysics and dynamic processes, there are significant differences in the discharge process within clouds, resulting in significant differences in corresponding lightning activities. The hailstorm has larger ratio of CG (cloud-to-ground) lightning, and the ratio of positive CG lightning is 0.311, comparing to 0.191 of the rainstorm.During the rainstorm, the intensity of convective precipitation is decreasing sharply when the lightning frequency reaches the highest value. The lightning frequency in this region can provide about 5-15 min warning time for the maximum rainfall intensity. In the early stage of hailstorm, rainstorm with short duration occurs, and the frequency of lightning reaches the peak when the hailstorm occurs, and then it declines as the hailstorm maintains. The hailstorm has larger ratio of CG lightning than the rainstorm. The main discharge area in hailstorm is higher than that in rainstorm, the temperature layer corresponded to the main charge region in hailstorm is lower than that in rainstorm. The total lightning frequency between convective precipitation''s linear correlation coefficient is better in rainstorm than that in hailstorm.The linear correlation between lightning and precipitation in hailstorm is more complicated, because hailstorm has more complex dynamic and ice phase microphysics. These quantificational results can provide reference for applications of lightning data in severe weather warning and precipitation estimation.However, it''s not certain whether all hailstorms have the similar lightning and precipitation relationships (the highest precipitation in the early stage of the hailstorms, and the total flash to reach the maximum in the hail stage). These results can be improved through further analysis when there are more observation cases. |
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| Keywords: | lightning precipitation rainstorm hailstorm |
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