| 摘要: |
| 利用广西2016—2019年三维闪电监测资料，分析广西闪电活动时空分布特征并进行天气学初探，得到以下结论：①广西雷电活动主要发生在4—9月，日变化季节性、区域性差异显著，月变化主要表现为桂中及桂南单峰型、桂西北和桂南双峰型及桂东北多波动型等3种类型，空间分布表现为桂南、桂东南、桂西北及桂东北4个雷电活动频繁区域。②广西雷电活动云地闪较云闪偏多，闪电的极性以负闪为主，云闪高度较为集中在0~1 km及2~7 km高度上，2~7 km高度上闪电频次年际、季节性、区域性差异显著。③春季印缅槽和亚洲经向环流偏强有利于广西雷电发生，反之则不利；夏季，西太平洋副热带高压平均脊线位置较常年（26.3°N）略微偏南（25.5~26°N）时有利于雷电发生,异常偏南或偏北则不利。 |
| 关键词: 三维闪电监测定位系统；时空分布；云闪高度 |
| DOI： |
| 投稿时间：2020-03-02 |
| 基金项目:广西区气象局面上项目（桂气科2019M04）：广西大气电场监测系统预警效果验证及预警算法优化 |
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| Temporal and Spatial Characteristics of Lightning in Guangxi Based onVLF/LF 3D Lightning Location System |
| LU Bingfu,ZHI Yaoling,HUANG Yiman,QIN Zhang,GUO Yuan |
| (Guangxi Lightning Protection Center, Nanning 530022 , China;Guangxi Meteorological Agency Service Center, Nanning 530022 , China) |
| Abstract: |
| Based on the lightning data of VLF/LF 3D lightning location system from 2016 to 2019 in Guangxi, the temporal and spatial characteristics of lightning activities were analyzed, and a preliminary study of synoptic meteorology was made. It is found that: ①Lightning activities occurred mainly from April to September in Guangxi, with significant seasonal and regional differences in daily changes. The monthly changes are mainly manifested in three types: single peak type in central and southern Guangxi, double peak type in northwest and southern Guangxi, and multi-fluctuation type in northeast Guangxi. The spatial distribution is manifested in four frequent lightning activities regions: southern, southeast, northwest and northeast Guangxi.②CG occurred more than IC in Guangxi lightning activity, and flashes were mainly negative; the height of IC mainly occurred at 0~1 km and 2~7 km, and showed the significant differences in different years, seasons and regions at 2~7 km.③In spring, the strong India-Burma Trough and Asian Meridional Circulation is favorable to the occurrence of lightning in Guangxi, otherwise, it is not; in summer, the average ridge position of Western Pacific Subtropical High is slightly south (25.5°~26 °N) than that in the perennial (26.3°N), which is favorable to the occurrence of lightning, while the abnormal South or north is not. |
| Key words: 3D lightning location monitoring system；temporal and spatial distribution；height of intracloud flash |
