Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL093614 |
Insights on space-leader characteristics and evolution in natural negative cloud-to-ground lightning | |
Hamza Khounate; Amitabh Nag; Mathieu N. Plaisir; Abdullah Y. Imam; Christopher J. Biagi; Hamid K. Rassoul | |
2021-07-30 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | We present sub-microsecond-scale, high-speed video camera observations of three negative stepped leaders in cloud-to-ground flashes with return-stroke peak currents (estimated by the U.S. National Lightning Detection Network) of -17, -104, and -228 kA. The camera frame exposure times for these observations were 1.8, 1.0 and 0.74 µs, respectively. The 0.74 µs exposure time is the shortest reported to date. We observed the temporal and spatial evolution of space leaders from their inception to their attachment to the pre-existing leader channel (PELC). For stepped leaders that led to return strokes having higher peak currents, the space leaders appear to have incepted at farther median two-dimensional distances from their respective PELC-attachment points. These median distances were 6.1, 16.6, and 17.6 m, respectively, for the three strokes. Our observations indicate that space leader characteristics are likely influenced by stepped-leader line-charge-density, which is expected to be higher in strokes with higher return-stroke peak currents. |
领域 | 气候变化 |
URL | 查看原文 |
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/335321 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Hamza Khounate,Amitabh Nag,Mathieu N. Plaisir,et al. Insights on space-leader characteristics and evolution in natural negative cloud-to-ground lightning[J]. Geophysical Research Letters,2021. |
APA | Hamza Khounate,Amitabh Nag,Mathieu N. Plaisir,Abdullah Y. Imam,Christopher J. Biagi,&Hamid K. Rassoul.(2021).Insights on space-leader characteristics and evolution in natural negative cloud-to-ground lightning.Geophysical Research Letters. |
MLA | Hamza Khounate,et al."Insights on space-leader characteristics and evolution in natural negative cloud-to-ground lightning".Geophysical Research Letters (2021). |
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