| 一次飑线过程的闪电活动特征 |
| |
| 引用本文： | 冯桂力,王俊,龚佃利,李海腾,张文.一次飑线过程的闪电活动特征[J].山东气象,2009,29(1). |
| |
| 作者姓名： | 冯桂力 王俊 龚佃利 李海腾 张文 |
| |
| 作者单位： | 1. 山东省雷电防护技术中心,济南,250031
2. 山东省人工影响天气办公室,济南,250031 |
| |
| 基金项目： | 国家自然科学基金，山东省气象基金 |
| |
| 摘 要： | 结合地闪定位资料和TRMM卫星LIS观测的总闪电资料对一次飑线过程闪电活动进行分析,结果如下:这次飑线过程的正地闪超过了负地闪,占地闪的54.7%.在系统发展的初始阶段全部为正地闪;在系统的快速发展阶段地闪频数明显增大,正地闪比例很高,均在75%以上.在系统成熟至减弱阶段,地闪频数开始下降,而正地闪比例下降,负地闪的比例却越来越大,并占据支配地位.正地闪发生在线对流区(即强回波区内或附近),负地闪发生在层状云区.正地闪并不对应于主上升气流区而是紧邻上升气流区的后部.该雷暴云内闪电活动非常频繁,云地闪比例高达26.1:1.降雹和地面大风区位于正地闪密集区内,地闪频数峰值对应于地面大风阶段.
|
| 关 键 词： | 飑线 闪电频数 正地闪比例 分布特征 |
Analysis of Lightning Characteristics of a Squall Line System |
| |
| Feng Guili,Wang Jun,Gong Dianli,Li Haiteng,Zhang Wen.Analysis of Lightning Characteristics of a Squall Line System[J].Journal of Shandong Meteorology,2009,29(1). |
| |
| Authors: | Feng Guili Wang Jun Gong Dianli Li Haiteng Zhang Wen |
| |
| Institution: | 1.Shandong Lightning Protection Technology Center;Jinan 250031;P.R.China;2.Shandong Weather Modification Office;P.R.China |
| |
| Abstract: | The characteristics of cloud-to-ground lightning(CG) in a squall line were studied in detail by combining the data from ground-based CG location network and Lightning Imaging Sensor on TRMM satellite.Results show that positive CG flashes accounted for 54.7% of the total CG flashes.During the initial developing stage,most of the CG flashes were positive.CG flash rate increased significantly along with the rapid development of the squall line,and the percentage of positive CG was more than 75% during this per... |
| |
| Keywords: | Squall line Lightning flash rate Ratio of positive lightning Distribution characteristics |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
