DOI: 10.1016/j.atmosres.2018.10.013
Scopus记录号: 2-s2.0-85055630098
论文题名: A study of lightning flash initiation prior to the first initial breakdown pulse
作者: Marshall T. ; Bandara S. ; Karunarathne N. ; Karunarathne S. ; Kolmasova I. ; Siedlecki R. ; Stolzenburg M.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2019
卷: 217 起始页码: 10
结束页码: 23
语种: 英语
英文关键词: Initial breakdown pulse
; Initial lightning breakdown
; Lightning
; Lightning initiation
Scopus关键词: Integrated circuits
; Lightning
; Lightning protection
; Cloud-to-ground lightning
; Electric field change
; Initial breakdown pulse
; Initial lightning breakdown
; Initiating events
; Lightning flashes
; Lightning initiation
; Positive corona
; Clouds
; atmospheric electricity
; cloud to ground lightning
; corona
; electric field
; sensor
; Mississippi
; United States
英文摘要: This study examines the initiation of two intracloud (IC) and two cloud-to-ground (CG) lightning flashes using electric field change (FA) sensors and VHF (LogRF) sensors located at seven sites near Oxford, Mississippi, USA. For each flash the initiating event caused a pulse in the LogRF data and started an Initial E-Change (IEC) in the FA data. The initiating LogRF pulses had powers <1 W and durations of ~1 μs. Numerous LogRF pulses occurred during each IEC; these pulses had durations ≤3 μs. Fewer FA pulses occurred during each IEC; these pulses had durations of ≤7 μs. During each IEC, a few of the LogRF pulses were coincident with a FA pulse, and most such pairs of pulses enhanced the IEC; no IEC enhancing events occurred without such a coincident pair. Each flash had 1 or 2 IEC enhancing events soon after the initiating event and 1 or 2 enhancing events shortly before the first classic initial breakdown (IB) pulse occurred. The point dipole moments and durations of IECs of the two IC flashes were (–520C m, 620 μs) and (–770C m, 1790 μs) and for the two CG flashes were (9C m, 124 μs) and (36C m, 130 μs). We speculate that the LogRF events were positive corona streamers, that enhancing events occurred when a new streamer extended a previous streamer path, and that this process during the flash initiation developed a nascent channel needed for the negative breakdown of the IB pulses. © 2018 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122376
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Physics & Astronomy, University of Mississippi, University, MS 38677, United States; Department of Space Physics, Institute of Atmospheric Physics CAS, Prague, Czech Republic; Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic; Baptist College of Health Sciences, Memphis, TN 38104, United States
Recommended Citation:
Marshall T.,Bandara S.,Karunarathne N.,et al. A study of lightning flash initiation prior to the first initial breakdown pulse[J]. Atmospheric Research,2019-01-01,217