| 星地探测闪电在一次中尺度对流系统中的活动特征分析 |
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| 引用本文： | 刘向科,康宁,张琴,刘畅.星地探测闪电在一次中尺度对流系统中的活动特征分析[J].气象科技,2023,51(1):14-21. |
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| 作者姓名： | 刘向科 康宁 张琴 刘畅 |
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| 作者单位： | 山东省气象防灾减灾重点实验室，济南 250031;2 中国气象局中国遥感卫星辐射测量和定标重点开放实验室/国家卫星气象中心（国家空间天气监测预警中心），北京 100081；3 许健民气象卫星创新中心，北京 100081;山东省淄博市气象局，淄博 255048 |
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| 基金项目： | 山东省气象局科研项目（2020sdqxz07）资助 |
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| 摘 要： | 为更好地发挥星地闪电探测资料在中尺度对流系统中的监测预警应用潜力，本文以2018年6月27日山东地区的一次中尺度对流系统为例，利用云顶温度、云顶降温率、雷达等资料与FY 4A闪电成像仪LMI（Lightning Mapping Imager）、ADTD（Advanced TOA and Direction system）闪电定位系统星地闪电探测资料，分析了星地闪电数据在中尺度对流系统中闪电分布特征及其与对流演变的关系，结果表明:星地探测闪电一致性较好，LMI相对位于对流云前方，星地闪电与降水区域吻合度较高。在系统发展初期，LMI超前于ADTD探测到闪电，且位于回波中心和前侧，回波垂直方向呈现出向前倾斜特征，这对于判识对流移动和演变趋势有较好的指示作用，在预报业务中可采用LMI的位置来辅助制作强对流落区预报。在成熟阶段，星地闪电频次出现跃增，正地闪比例较高，该时段山东多地发生冰雹灾害，LMI多出现在对流系统移动方向前方的弱回波或无回波区内，ADTD则更接近回波中心位置。合并阶段，部分LMI位于前方强回波区后部，与强回波区相对应。
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| 关 键 词： | LMI ADTD 星地对比 TBB 云顶 降温率 雷达回波 |
| 收稿时间： | 2022/3/17 0:00:00 |
| 修稿时间： | 2022/10/10 0:00:00 |
Analysis of Activity Characteristics of Satellite-to-Ground Lightning Detection in A Mesoscale Convective System |
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| LIU Xiangke,KANG Ning,ZHANG Qin,LIU Chang.Analysis of Activity Characteristics of Satellite-to-Ground Lightning Detection in A Mesoscale Convective System[J].Meteorological Science and Technology,2023,51(1):14-21. |
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| Authors: | LIU Xiangke KANG Ning ZHANG Qin LIU Chang |
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| Institution: | Key Laboratory for Meteorological Disaster Prevention and Mitigation of Shandong, Jinan 250031;2 Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, National Satellite Meteorological Center (National Center for Space Weather), China Meteorological Administration, Beijing 100081; 3 Innovation Center for FengYun Meteorological Satellite (FYSIC), Beijing 100081;Zibo Meteorological Bureau of Shandong Province, Zibo 255048 |
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| Abstract: | In order to better exert the monitoring and early warning application potential of satellite to ground lightning detection data in the Mesoscale Convective System (MCS), this study takes an MCS in Shandong on June 27, 2018, as a case, using the cloud top temperature, cooling rate, the reflectivity from radar and the satellite to ground lightning data from FY 4A Lightning Mapping Imager (LMI) and Advanced TOA and Direction system (ADTD) to analyze the lightning distribution characteristics and its relationship with the evolution of convection. The results show a good consistence of the satellite to ground lightning data. The lighting of LMI was further located in front of the convective cloud and had a high agreement with the precipitation region. In the early development stage of MSC, LMI detected lightning earlier than ADTD, and the lightning was located in the centre and the front side of the radar echo. The vertical section of the echo showed a forward tilting, which was a good indicator of the movement and evolution trend of convection. Thus, the location of the lightning from LMI could be used to assist in the forecast of strong convection areas. In the mature stage, the frequency of satellite to ground lightning increased, and the proportion of positive ground lightning was relatively large. Hail disasters occurred in many places in Shandong Province during this period. The LMI mostly appeared in the weak or no echo area in front of the moving direction of the convective system, while the ADTD lightning was closer to the centre position of the echo. During the merging stage, some of the LMI lightning was located at the backside of the front, strong echo area corresponding to the strong echo area. |
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| Keywords: | LMI ADTD comparison of the satellite and the ground station TBB cooling rate cloud top radar echo |
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