DOI: 10.1002/jgrd.50107
论文题名: Statistical patterns in the location of natural lightning
作者: Zoghzoghy F.G. ; Cohen M.B. ; Said R.K. ; Inan U.S.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 2 起始页码: 787
结束页码: 796
语种: 英语
Scopus关键词: Electric fields
; Electric utilities
; Lightning protection
; Statistical mechanics
; Storms
; Charge separations
; Cloud-to-ground flash
; Geographic location
; Lightning detection
; Lightning discharge
; Statistical pattern
; Statistical techniques
; Suppression effects
; Clouds
; atmospheric electricity
; cloud to ground lightning
; data set
; electric field
; electrification
; thundercloud
英文摘要: Lightning discharges are nature's way of neutralizing the electrical buildup in thunderclouds. Thus, if an individual discharge destroys a substantial fraction of the cloud charge, the probability of a subsequent flash is reduced until the cloud charge separation rebuilds. The temporal pattern of lightning activity in a localized region may thus inherently be a proxy measure of the corresponding timescales for charge separation and electric field buildup processes. We present a statistical technique to bring out this effect (as well as the subsequent recovery) using lightning geo-location data, in this case with data from the National Lightning Detection Network (NLDN) and from the GLD360 Network. We use this statistical method to show that a lightning flash can remove an appreciable fraction of the built up charge, affecting the neighboring lightning activity for tens of seconds within a ∼ 10 km radius. We find that our results correlate with timescales of electric field buildup in storms and suggest that the proposed statistical tool could be used to study the electrification of storms on a global scale. We find that this flash suppression effect is a strong function of flash type, flash polarity, cloud-to-ground flash multiplicity, the geographic location of lightning, and is proportional to NLDN model-derived peak stroke current. We characterize the spatial and temporal extent of the suppression effect as a function of these parameters and discuss various applications of our findings. © 2012. American Geophysical Union. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63987
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Electrical Engineering, Stanford University, Stanford, CA, United States; Vaisala Inc., Boulder Operations, Louisville, CO, United States; Electrical Engineering Department, Koc University, Sariyer, 34450, Istanbul, Turkey
Recommended Citation:
Zoghzoghy F.G.,Cohen M.B.,Said R.K.,et al. Statistical patterns in the location of natural lightning[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(2)