DOI: 10.1002/2017JD027729
Scopus记录号: 2-s2.0-85042432266
论文题名: Initial Breakdown Pulse Parameters in Intracloud and Cloud-to-Ground Lightning Flashes
作者: Smith E.M. ; Marshall T.C. ; Karunarathne S. ; Siedlecki R. ; Stolzenburg M.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 4 起始页码: 2129
结束页码: 2140
语种: 英语
英文关键词: lightning
Scopus关键词: altitude
; amplitude
; array
; cloud to ground lightning
; correlation
; histogram
; storm
; Florida [United States]
; United States
英文摘要: This study analyzes the largest initial breakdown (IB) pulse in flashes from four storms in Florida; data from three sensor arrays are used. The range-normalized, zero-to-peak amplitude of the largest IB pulse was determined along with its altitude, duration, and timing within each flash. Appropriate data were available for 40 intracloud (IC) and 32 cloud-to-ground (CG) flashes. Histograms of amplitude of the largest IB pulse by flash type were similar, with mean (median) values of 1.49 (1.05) V/m for IC flashes and −1.35 (−0.87) V/m for CG flashes. The largest IB pulse in 30 IC flashes showed a weak inverse relation between pulse amplitude and altitude. Amplitude of the largest IB pulse for 25 CG flashes showed no altitude correlation. Duration of the largest IB pulse in ICs averaged twice as long as in CGs (96 μs versus 46 μs), and all of the CG durations were <100 μs. Among the ICs, there is a positive relation between largest IB pulse duration and amplitude; the linear correlation coefficient is 0.385 with outliers excluded. The largest IB pulse in IC flashes typically occurred at a longer time after the first IB pulse (average 4.1 ms) than was the case in CG flashes (average 0.6 ms). In both flash types, the largest IB pulse was the first IB pulse in about 30% of the cases. In one storm all 42 IC flashes with triggered data had IB pulses. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114456
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics and Astronomy, University of Mississippi, University, MS, United States
Recommended Citation:
Smith E.M.,Marshall T.C.,Karunarathne S.,et al. Initial Breakdown Pulse Parameters in Intracloud and Cloud-to-Ground Lightning Flashes[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(4)