DOI: 10.1002/2014GL061169
论文题名: A negative cloud-to-ground flash showing a number of new and rarely observed features
作者: Tran M.D. ; Rakov V.A. ; Mallick S.
刊名: Geophysical Research Letters
ISSN: 0094-9783
EISSN: 1944-9514
出版年: 2014
卷: 41, 期: 18 起始页码: 6523
结束页码: 6529
语种: 英语
英文关键词: attachment process
; bolt from the blue
; corona
; high-speed camera
; lightning
; space stem
Scopus关键词: Lightning protection
; Above ground level
; Attachment process
; Branching process
; Cloud-to-ground flash
; corona
; Lightning flashes
; space stem
; Spatial extent
; Lightning
; bolt
; corona
; lightning
; observational method
; photography
; spatial analysis
; Florida [United States]
; Gainesville
; United States
英文摘要: An unusual natural lightning flash containing two branched negative strokes to ground was recorded at the Lightning Observatory in Gainesville, Florida, on 8 June 2013. The flash was apparently a bolt from the blue, whose first-stroke leader emerged from the side of the cloud at a height of about 3.5 km above ground level. The first leader showed profuse branching and what appears to be corona-like formations with spatial extent of 100 to 200 m (probably an intensified portion of radial corona sheath) at the upper part of the channel. Leader branching process facilitated by two simultaneous space stems was observed. The corresponding step lengths were estimated to be 14 and 15 m. The first-stroke attachment process involved a streamer zone about 50 m in length. One of the second-leader branches appeared to abruptly change its direction at the beginning of return stroke process. Key PointsTwo space stems giving rise to two concurrent leader branchesTens of meters streamer zone near ground prior to return stroke onsetReturn stroke altering the direction of a leader branch ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911164394&doi=10.1002%2f2014GL061169&partnerID=40&md5=a6c7b17e38145349c75c1c1fccfb7250
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7047
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, United States
Recommended Citation:
Tran M.D.,Rakov V.A.,Mallick S.. A negative cloud-to-ground flash showing a number of new and rarely observed features[J]. Geophysical Research Letters,2014-01-01,41(18).