Simultaneous optical and electrical observations on the initial processes of altitude-triggered negative lightning
文献类型：期刊论文
| 作者 | Lu, Weitao1; Zhang, Yijun1; Zhou, Xiuji1; Qje, Xiushu2; Zheng, Dong1; Meng, Qing1; Ma, Ming1; Chen, Shaodong1,3; Wang, Fei1; Kong, Xiangzhen2 |
| 刊名 | ATMOSPHERIC RESEARCH
 |
| 出版日期 | 2009-02-01 |
| 卷号 | 91期号:2-4页码:353-359 |
| 关键词 | Altitude-triggered lightning Bidirectional leader High-speed camera Initial processes |
| ISSN号 | 0169-8095 |
| DOI | 10.1016/j.atmosres.2008.01.011 |
| 通讯作者 | Lu, Weitao(wtlu@ustc.edu) |
| 英文摘要 | Using a high-speed camera system and two electric field antenna systems, we have documented the initial processes of an altitude-triggered negative lightning (ATNL). The optical records clearly show that ATNL begins with the inception and propagation of an upward positive leader (UPL) and then a simultaneous propagation of UPL and downward negative leader (DNL), known as the bidirectional leader process, follows. Based on the optical records, it is inferred that (1) the triggering height is about 371 m: (2) the two-dimensional (21)) propagation speed of the UPL in its inception phase is about 3.8-5.5 x 10(4) m s(-1) during its propagation from about 393 to 452 m above the ground: (3) the grey levels of the DNL are about one order of magnitude higher than that of the UPL in their inception phase; (4) a discharge phenomenon propagating along the elevated triggering wire part of the lightning channel occurs after the mini-return stroke (MRS), with a 2D propagation speed of about 1.6-2.0x10(5) m s(-1). Combined with the simultaneous electric field change records, it is further inferred that (1) the UPL incepts about 932 PS earlier than the unstable DNL and about 4.1 ms earlier than the stable DNL; (2) the unstable DNL propagates downward intermittently three times with a time interval of about 1 ms, and each propagation contains a different number of steps with an average step length of about 7 m; (3) the stable DNL incepts at the tip of the unstable one, with a 2D propagation speed of about 1.9 x 10(5) m s(-1), an average step length of about 3 m, and a stepping time interval varying from 6 to 31 mu s with a mean value of 15 mu s. (C) 2008 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI ; ISTP |
| WOS关键词 | THUNDERSTORMS ; DISCHARGE ; AIRCRAFT ; LEADER |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| WOS类目 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000263193900028 |
| 出版者 | ELSEVIER SCIENCE INC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556157 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Lu, Weitao |
| 作者单位 | 1.Chinese Acad Meteorol Sci, Lab Lightning Phys & Protect Engn, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 3.Lightning Protect Ctr Guangdong Prov, Guangzhou 510080, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lu, Weitao,Zhang, Yijun,Zhou, Xiuji,et al. Simultaneous optical and electrical observations on the initial processes of altitude-triggered negative lightning[J]. ATMOSPHERIC RESEARCH,2009,91(2-4):353-359. |
| APA | Lu, Weitao.,Zhang, Yijun.,Zhou, Xiuji.,Qje, Xiushu.,Zheng, Dong.,...&Kong, Xiangzhen.(2009).Simultaneous optical and electrical observations on the initial processes of altitude-triggered negative lightning.ATMOSPHERIC RESEARCH,91(2-4),353-359. |
| MLA | Lu, Weitao,et al."Simultaneous optical and electrical observations on the initial processes of altitude-triggered negative lightning".ATMOSPHERIC RESEARCH 91.2-4(2009):353-359. |
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来源：寒区旱区环境与工程研究所
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