Optical and electrical characteristics of in-cloud discharge activity and downward leaders in positive cloud-to-ground lightning flashes
文献类型：期刊论文
| 作者 | Kong, Xiangzhen; Zhao, Yang; Zhang, Tong; Wang, Huaibin |
| 刊名 | Atmospheric research
 |
| 出版日期 | 2015-06-15 |
| 卷号 | 160页码:28-38 |
| 关键词 | Positive cg lightning flash Positive leader In-cloud discharge process Optical images Electric field change |
| ISSN号 | 0169-8095 |
| DOI | 10.1016/j.atmosres.2015.02.014 |
| 通讯作者 | Kong, xiangzhen(kongxz@lzb.ac.cn) |
| 英文摘要 | The characteristics of five downward positive cloud-to-ground (cg) flashes were analyzed based on images from a high-speed video camera and electric field (e-field) changes from slow antenna and fast antenna systems. the flashes persisted for 740 ms to 1250 ms. the luminous durations of the leaders ranged from 4 ms to 24 ms. the average 2-0 development speeds of the positive leaders ranged from 0.3 x 10(5) m/s to 2.0 x 10(5) m/s. the propagation speeds of the positive leaders increased as they approached the ground. approximately 53.9% of the 89 observed positive cg flashes exhibited isolated monopolar pulses during the leader propagation and immediately prior to the return stroke. the average time interval between adjacent leader pulses was 15 mu s according to the e-field changes. most leaders of positive cg flashes (approximately 67.4%) began in the presence of prolonged and intense in-cloud discharge (ic) activity that ranged from 100 ms to 973 ms. a cloud discharge may be conducive to the formation of positive cg flashes. generally, a higher occurrence of positive cg flashes corresponded to a higher occurrence of cloud flash, which suggests that positive cg flash can be initiated by a cloud discharge. four positive cg flashes exhibited one return stroke, and only one flash had two strokes. (c) 2015 elsevier b.v. all rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | THUNDERSTORMS ; SPRITES ; FIELDS ; CHINA |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| WOS类目 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000355709300003 |
| 出版者 | ELSEVIER SCIENCE INC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555009 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Kong, Xiangzhen |
| 作者单位 | Chinese Acad Sci, Key Lab Land Surface Proc & Climate Change Cold &, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kong, Xiangzhen,Zhao, Yang,Zhang, Tong,et al. Optical and electrical characteristics of in-cloud discharge activity and downward leaders in positive cloud-to-ground lightning flashes[J]. Atmospheric research,2015,160:28-38. |
| APA | Kong, Xiangzhen,Zhao, Yang,Zhang, Tong,&Wang, Huaibin.(2015).Optical and electrical characteristics of in-cloud discharge activity and downward leaders in positive cloud-to-ground lightning flashes.Atmospheric research,160,28-38. |
| MLA | Kong, Xiangzhen,et al."Optical and electrical characteristics of in-cloud discharge activity and downward leaders in positive cloud-to-ground lightning flashes".Atmospheric research 160(2015):28-38. |
入库方式： iSwitch采集
来源：寒区旱区环境与工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。