Analysis of a Mesoscale Convective System that Produced a Single Sprite

查看全文 作　　者：Jing [1,2]YANG;Gaopeng [1,2]LU;Ningyu [3]LIU;Haihua [4]CU;Yu [5]WANG;Morris [6]COHEN

机构地区：[1]Key Laboratory of Middle Atmosphere and Global Environment Observation,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;[2]Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science and Technology,Nanjing 210044,China;[3]Geospace Physics Laboratory,Physics and Space Sciences Department,Florida Institute of Technology,Melbourne,FL 32901,USA;[4]Hebei Province meteorological Bureau,Shijiazhuang 050000,China;[5]State Grid Electric Power Research Institute,Wuhan 430074,China;[6]School of Electrical and Computer Engineering,Georgia Institute of Technology,Atlanta,GA 30332,USA

出　　处：《Advances in Atmospheric Sciences》索引2017年第34卷第2期,共14页

基　　金：supported jointly by the National Natural Science Foundation of China(Grant Nos.41374153 and 41574141);the High Resolution Earth Observation Funds for Young Scientists(Grant No.GFZX04060103-711);the Youth Innovation Promotion Association of the Chinese Academy of Sciences(Grant No.2013053) 摘　　要：Sprites are brief optical emissions occurring above thunderstorms. Features of sprites and their parent thunderstorms and lightning activities have been studied by many researchers. Here, we report a single sprite recorded over a mesoscale convective system during its life cycle in Northeast China. The results show that the sprite might have been a dancing one,with a 20 km horizontal displacement from its parent cloud-to-ground flash(CG) and a 38 ms time delay; all the sprite elements occurred during the continuing current process of the parent flash. The peak current of the parent CG was the largest during the almost one-hour time window containing the sprite, and the absolute values of all the negative flashes were smaller than 100 k A during the same time period and did not produce sprite. The sprite did not occur during the time period in which the maximum area of the thunderstorm reached. The occurrence of sprite corresponded well with the decay of the thunderstorm convection, and no significant relationship between the occurrence of sprite and the increase in the 30–35 d BZ and 35–40 d BZ interval was found. The large wind gradient in the 8–12 km region of the thunderstorm may have played an important role in the sprite production. 关键词：中尺度对流系统单粒子时间延迟研究人员活动特征生命周期水平位移持续电流

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Analysis of a Mesoscale Convective System that Produced a Single Sprite

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