DOI: 10.1029/2017JD028248
Scopus记录号: 2-s2.0-85048655347
论文题名: Statistical Distributions of Lightning Peak Currents: Why Do They Appear to Be Lognormal?
作者: Slyunyaev N.N. ; Mareev E.A. ; Rakov V.A. ; Golitsyn G.S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 10 起始页码: 5070
结束页码: 5089
语种: 英语
英文关键词: lightning
; lognormal distribution
; model
; peak current
; statistics
英文摘要: The statistical distribution of peak currents in cloud-to-ground lightning strokes is analyzed and discussed both in the context of the existing experimental data and from a theoretical viewpoint. The distributions of peak currents directly measured at instrumented towers are compared to those of peak currents reported by the U.S. National Lightning Detection Network and peak currents measured in rocket-triggered lightning experiments; all those appear to be lognormal. To explain the observed peak current distributions, a simple model based on the large-scale electric field evolution prior to lightning flashes is developed. Based only on the most general assumptions concerning the probability of occurrence of lightning discharge, it is shown that the distribution of the pre-first-stroke large-scale electric field is close to lognormal in a certain range. With the introduction of structure factors relating the leader or cloud electric potential to this field, semiempirical relationships between the potential and the peak current in negative first and subsequent strokes imply that the peak current and pre-first-stroke large-scale electric field obey distributions of the same type. It is demonstrated that with a suitable choice of parameters, the model-predicted distributions are close to those obtained from direct measurements, and statistical tests show that their agreement with the data is at least as good as that seen for lognormal approximations. ©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/113832
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russian Federation; Department of Radiophysics, Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russian Federation; Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, United States; A. M. Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Moscow, Russian Federation
Recommended Citation:
Slyunyaev N.N.,Mareev E.A.,Rakov V.A.,et al. Statistical Distributions of Lightning Peak Currents: Why Do They Appear to Be Lognormal?[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(10)