Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL074228 |
Upward negative leaders in positive triggered lightning: Stepping and branching in the initial stage | |
Pu, Yunjiao1,2; Jiang, Rubin1,3; Qie, Xiushu1,2,3; Liu, Mingyuan1; Zhang, Hongbo1,2; Fan, Yanfeng1,2; Wu, Xueke4 | |
2017-07-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
![]() |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | By conducting comprehensive observation on the rarely triggered positive lightning flashes, two cases of upward negative leaders were quantitatively investigated with simultaneous data of current, optical, and electromagnetic field changes at fine time resolution. The impulsive channel current associated with the initial leader stepping involved pulse interval, peak, charge of 19.1 mu s, 122.3 angstrom, 465.9 mu C, and 20.3 mu s, 58.4 angstrom, 267.2 mu C, for the two cases, respectively. The negative charge of an individual step was nearly an order of magnitude larger than that of the positive leader step in triggered lightning. The upward negative stepped leader branches shortly after initiation, and consequently, the stepping-caused current pulses became multipeaked, wider, and more frequent in waveforms. The main leader tip propagated at an average speed of 2.10 x 10(5) m/s, while its partial speed fluctuated a lot as was significantly influenced by the behaviors of subbranches development. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406257400065 |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29152 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Obser, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China; 3.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing, Jiangsu, Peoples R China; 4.Lanzhou Univ, Coll Atmospher Sci, Lanzhou, Gansu, Peoples R China |
推荐引用方式 GB/T 7714 | Pu, Yunjiao,Jiang, Rubin,Qie, Xiushu,et al. Upward negative leaders in positive triggered lightning: Stepping and branching in the initial stage[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(13). |
APA | Pu, Yunjiao.,Jiang, Rubin.,Qie, Xiushu.,Liu, Mingyuan.,Zhang, Hongbo.,...&Wu, Xueke.(2017).Upward negative leaders in positive triggered lightning: Stepping and branching in the initial stage.GEOPHYSICAL RESEARCH LETTERS,44(13). |
MLA | Pu, Yunjiao,et al."Upward negative leaders in positive triggered lightning: Stepping and branching in the initial stage".GEOPHYSICAL RESEARCH LETTERS 44.13(2017). |
条目包含的文件 | 条目无相关文件。 |
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。
修改评论