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DOI | 10.1029/2019JD030399 |
Griffiths and Phelps Lightning Initiation Model, Revisited | |
Attanasio, Alex1,2; Krehbiel, Paul R.1,2; da Silva, Caitano L.1,2 | |
2019-07-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:14页码:8076-8094 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | In this paper we reconstruct Griffiths and Phelps' seminal model of streamer systems to test if it can reproduce the key observational features of fast positive breakdown. We first confirm that our implementation is accurate by reproducing the original results. The model describes how a system of positive streamers exhibits an initial exponential charge growth, as a function of position or time, which rapidly transitions into a quadratic steady state. The charge growth is accompanied by substantial electric field enhancement near the onset location, creating favorable conditions for lightning initiation. Due to the relatively low conductivity of streamers (effectively zero in this model), the electric field enhancement is created by the charge deposited in the first few meters of propagation, in the scale length where the charge growth transitions from exponential to quadratic. The quadratic growth of charge, combined with conical system expansion, makes the surface charge density of the moving front constant. The resulting electric field ahead of the streamer system remains nearly constant during its propagation, consistent with the observations of fast breakdown, which reveal a nearly constant propagation velocity, independently of discharge polarity. Minimal changes to the model allow for simulation of narrow bipolar events, reproducing very well their characteristic bipolar electric field change waveform. Despite its simplicity, the Griffiths and Phelps model provides valuable physical insights in the relationship between fast positive breakdown and lightning initiation. |
英文关键词 | lightning lightning initiation NBE TGF streamer leader |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000481444200035 |
WOS关键词 | PROPAGATION |
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/185249 |
专题 | 气候变化 |
作者单位 | 1.New Mexico Inst Min & Technol, Dept Phys, Socorro, NM 87801 USA; 2.New Mexico Inst Min & Technol, Langmuir Lab, Socorro, NM 87801 USA |
推荐引用方式 GB/T 7714 | Attanasio, Alex,Krehbiel, Paul R.,da Silva, Caitano L.. Griffiths and Phelps Lightning Initiation Model, Revisited[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(14):8076-8094. |
APA | Attanasio, Alex,Krehbiel, Paul R.,&da Silva, Caitano L..(2019).Griffiths and Phelps Lightning Initiation Model, Revisited.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(14),8076-8094. |
MLA | Attanasio, Alex,et al."Griffiths and Phelps Lightning Initiation Model, Revisited".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.14(2019):8076-8094. |
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