| 张萍萍,林修栋,张丽萍,刘文婷.一次TS型线状对流不同阶段LMI闪电特征分析[J].沙漠与绿洲气象,2024,18(2):99~106 |
| 一次TS型线状对流不同阶段LMI闪电特征分析 |
| Analysis of LMI Lightning Observation Characteristics in Different Evolution Stages of a TS Type Linear Convection |
| 投稿时间：2023-01-11 修订日期：2023-04-11 |
| DOI： |
| 中文关键词: 闪电成像仪 线状对流 监测预警 |
| 英文关键词:lightning mapping imager linear convection monitoring and warning |
| 基金项目:山东省气象局(2021SDYD36) |
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| 摘要点击次数: 216 |
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| 中文摘要: |
| 本文以2019年一次尾随层状（TS）型线状对流为研究个例，利用FY-4A闪电成像仪（LMI）资料、雷达组合反射率因子资料、地基闪电定位资料（ADTD）、FY-4A云顶亮温资料（TBB）和其他常规观测资料，对比分析了LMI闪电数据在TS型线状对流3个不同演变阶段的数据可靠性及观测特征。结果表明：TS型线状对流不同演变阶段的LMI闪电观测具有一定的时空连续性，LMI闪电分布与ADTD闪电分布的区域总体较为一致，但数量多于ADTD闪电数量，并多位于TBB≤240K的对流云中，LMI闪电数据可信度较高；对流发展阶段，LMI闪电观测大部位于TS型线状对流移动方向的前方，位置超前于前导对流线，对未来0-1小时内对流发展具有提前指示意义；对流成熟阶段，LMI闪电观测与前导对流线位置较为一致，对线状对流发展具有监测意义；对流减弱阶段，LMI闪电一部分位于减弱的前导对流线中，另一部分位于其后侧尾随的积层混合云中。最后，给出了本次TS型线状对流不同演变阶段LMI闪电观测特征示意图，为LMI闪电产品在对流天气监测预警中的应用提供一定参考。 |
| 英文摘要: |
| Taking a trailing stratiform(TS) linear convection in Hubei Province in 2019 as a case study, this paper uses FY-4A lightning imager (LMI) data, radar combined reflectivity factor data, ground-based lightning location data (ADTD), FY-4A cloud top brightness temperature data (TBB) and other conventional observation data to compare and analyze the reliability and observation characteristics of LMI lightning data in three different evolution stages of TS linear convection. The results show that LMI lightning observation has a certain degree of space-time continuity in different evolution stages of linear convection, and the distribution of LMI lightning is generally consistent with that of ADTD lightning, but the number of LMI lightning is more than that of ADTD lightning, and most of them are located in convective clouds with TBB ≤ 240K; In the stage of convection development, LMI lightning observation is mostly located in the front of the TS type linear convection leading convective line, which is ahead of the convective line, indicating the convection development in the next 0-1 hours in advance; In the mature stage of convection, LMI lightning observation is often close to the main body of convection, which is of monitoring significance for the development of linear convection; In the stage of convection weakening, part of LMI lightning is located in the weakened convective line in front of the linear convection, and the other part is located in the stratiform cloud area behind the linear convection. Finally, the schematic diagram of LMI lightning observation characteristics in different evolution stages of TS linear process is given, which provides some reference for the application of LMI lightning products in convective weather monitoring and early warning |
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