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DOI10.1002/2016JD026261
Advanced numerical model of lightning development: Application to studying the role of LPCR in determining lightning type
Iudin, D. I.1,2; Rakov, V. A.1,3; Mareev, E. A.1,2; Iudin, F. D.2; Syssoev, A. A.1; Davydenko, S. S.1
2017-06-27
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
EISSN2169-8996
出版年2017
卷号122期号:12
文章类型Article
语种英语
国家Russia; USA
英文摘要

An advanced 3-D numerical model of lightning development is presented. The key features of the model include the probabilistic branching, bidirectional propagation, nonzero internal electric field, simultaneous growth of multiple branches, physical timing, channel decay, and, for the first time, probabilistic propagation field threshold. The new model can be used for computing electrical parameters of individual branches, including conductivity, current, and longitudinal electric field, each as a function of time, in different parts of the discharge tree. For illustrative purposes, the model was applied to studying the occurrence of lightning flashes of different type depending on the cloud charge structure, with emphasis on the lower positive charge region (LPCR). We demonstrated with the new model that the presence of relatively large (excessive) LPCR can prevent the occurrence of negative CG flashes by "blocking" the progression of descending negative leader from reaching ground. The blocking effect of excessive LPCR was found to occur when the vertical component of electric field near the cloud bottom was negative (downward directed). Further, we showed that significant reduction or absence of LPCR can eliminate the possibility of negative CG flashes and lead to normal-polarity IC flashes instead. The model predicts the polarity-asymmetry, which suggests that the amount of collected charge depends not only on the number of branches but also on the dynamics of their conductivity (lifetime) and the local cloud charge density.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000405514000017
WOS关键词FRACTAL MODEL ; ELECTRICAL DISCHARGES ; DIELECTRIC-BREAKDOWN ; SOLID DIELECTRICS ; THUNDERSTORM ; THUNDERCLOUD ; SIMULATION ; FEATURES ; STRIKING ; LEADER
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/34382
专题气候变化
作者单位1.Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod, Russia;
2.Lobachevsky State Univ, Nizhnii Novgorod, Russia;
3.Univ Florida, Dept Elect & Comp Engn, Gainesville, FL USA
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GB/T 7714
Iudin, D. I.,Rakov, V. A.,Mareev, E. A.,et al. Advanced numerical model of lightning development: Application to studying the role of LPCR in determining lightning type[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(12).
APA Iudin, D. I.,Rakov, V. A.,Mareev, E. A.,Iudin, F. D.,Syssoev, A. A.,&Davydenko, S. S..(2017).Advanced numerical model of lightning development: Application to studying the role of LPCR in determining lightning type.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(12).
MLA Iudin, D. I.,et al."Advanced numerical model of lightning development: Application to studying the role of LPCR in determining lightning type".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.12(2017).
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