| DOI: | 10.1002/2016GL069267
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| 论文题名: | Imaging lightning intracloud initial stepped leaders by low-frequency interferometric lightning mapping array |
| 作者: | Lyu F.; Cummer S.A.; Lu G.; Zhou X.; Weinert J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9692
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| EISSN: | 1944-9423
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| 出版年: | 2016
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| 卷: | 43, 期:10 | | 起始页码: | 5516
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| 结束页码: | 5523
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| 语种: | 英语
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| 英文关键词: | channel structure
; IC initial breakdown pulses
; leader stepping dynamics
; lightning mapping
; step length
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| Scopus关键词: | Dynamics
; Electric fields
; Gamma rays
; Mapping
; Channel structures
; High energy radiation
; Initial breakdown pulse
; Lightning mapping array
; Step length
; Structure and dynamics
; Terrestrial Gamma ray Flashes
; Three dimensional (3D) structures
; Lightning
; channel
; cloud to ground lightning
; electric field
; gamma ray radiation
; imaging method
; mapping
; three-dimensional modeling
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| 英文摘要: | By comparing the source position of pulses during initial leaders and the paths of subsequent dart leaders from typical bilevel intracloud (IC) flashes, we demonstrate a new method to image the detailed three-dimensional (3-D) structure and stepping dynamics of IC initial leaders. Using this approach, we show that nearly half of the initial breakdown pulses are not involved in the main channel extension but instead originate in nonpropagating branches. The primary upward but significantly tilted initial leader channels propagated with measured mean/median 3-D step length of 295/265 m and mean/median step interval of 1.05/0.6 ms. The structure and dynamics of IC initial upward negative leaders are distinct from those of highly branched cloud-to-ground downward negative leaders. We suggest that the tilted initial leader channel and electric field could affect the observation on leader-associated high-energy radiation phenomena, such as the position-dependent observation of terrestrial gamma ray flashes from space-based detectors. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84973345892&doi=10.1002%2f2016GL069267&partnerID=40&md5=fb5221f6ee51742c4c1613811da59e43
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/10655
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Electrical and Computer Engineering Department, Duke University, Durham, NC, United States
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| Recommended Citation: | |
Lyu F.,Cummer S.A.,Lu G.,et al. Imaging lightning intracloud initial stepped leaders by low-frequency interferometric lightning mapping array[J]. Geophysical Research Letters,2016-01-01,43(10).
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