| 摘要: |
| 【目的】南昌地区地处亚热带地区，为了更好地监测预警雷电天气，提醒人们减少雷击事件的发生。【方法】使用南昌市历史雷击事件资料、江西雷达拼图资料和南昌、九江SA雷达基数据等资料，采用天气学、雷达气象学等原理及方法，对南昌地区雷击事件的雷达回波特征进行分析。【结果】（1）2013—2022年雷击事件共出现23次，孤立单体回波有2段闪电高发期，超级单体、飑线回波带和短带回波只有1个闪电高发期。（2）500 hPa高空槽、中层切变及西南急流等天气系统重叠最易产生雷击事件。（3）飑线回波带是由多个对流单体、强回波单体甚至超级单体回波排列组成的带状回波；短带回波长度比飑线回波带要短，回波强度也偏弱。【结论】上述结论为南昌地区雷电天气的监测预警提供分析依据。 |
| 关键词: 雷击事件；闪电相关；回波特征 |
| DOI： |
| 投稿时间：2023-09-13 |
| 基金项目:国家自然科学基金项目(41975001)；江西省气象局重点科研项目（JX2022Z04）共同资助 |
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| Analysis of Echo Characteristics of Lightning Strike Events in Nanchang Region |
| LYU Zhendong,DUAN Heping,QIANG Yujun,YU Zehua,GAO Chan |
| (Jiangxi Meteorological Service Center, Nanchang 330096 , China ;Jiangxi Ganxiang Lightning Protection Detection Center Co., Ltd., Nanchang 330006 , China;Jiangxi Climate Center, Nanchang 330096 , China;Nanchang Meteorological Bureau, Nanchang 330038 , China) |
| Abstract: |
| Nanchang City is located in subtropical region. In order to better monitor and warn against lightning weather and remind people to reduce the occurrence of lightning events, we use the historical lightning event data in Nanchang City, Jiangxi radar puzzle data, as well as Nanchang and Jiujiang SA radar base data in analyzing the characteristics of lightning events in Nanchang City by means of principles and methods of meteorology and radar meteorology. The results show that: (1)From 2013 to 2022, there were a total of 23 lightning strikes. There were two periods of high lightning occurrence for isolated cell echoes, and only one period of high lightning occurrence for supercell, squall line and short band echoes. (2)The overlap of 500 hPa high-altitude trough, middle-level shear line and southwest jet stream and other weather systems is most likely to generate lightning strikes. (3) The squall line echo band is a strip echo composed of multiple convective cells, strong echo cells, and even super cell echoes arranged in a row. The length of the short-band echo is shorter than that of the squall line echo, and the echo intensity is also weaker. The contour plane shows that the echo intensity of CAPPI at the 3,000 m altitude reaches 50-55 dBz, and the wind field has rotatability. The radial velocity field is a positive and negative velocity pair. These findings could provide an analytical basis for the monitoring and warning of lightning weather in Nanchang City. |
| Key words: lightning strikes； echo characteristics； lightning correlation |
