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| DOI | 10.1029/2019GL086089 |
| Indirectly Measured Ambient Electric Fields for Lightning Initiation in Fast Breakdown Regions | |
| Cummer S.A. | |
| 发表日期 | 2020 |
| ISSN | 0094-8276 |
| 卷号 | 47期号:4 |
| 英文摘要 | We report a new approach to measure indirectly the ambient thunderstorm electric fields in fast positive breakdown regions. For a given geometry of the discharged fast breakdown region, we show that there is a minimum ambient electric field required to produce a given charge moment change. We apply this approach to the fast breakdown measurements for two events reported by Rison et al. (2016, https://doi.org/10.1038/ncomms10721) and find that the average ambient electric field in the discharged region is at least 1.0 − 1.5 × 105V/m at the 9.5 km initiation altitude of these events. This electric field is close to the runaway electron avalanche electric field and to the critical field for positive streamer propagation. These measurements provide a meaningful starting point for more detailed analyses or simulations of what occurs inside the fast breakdown process that is responsible for the initiation of at least some lightning discharges. ©2020. American Geophysical Union. All Rights Reserved. |
| 英文关键词 | Lightning; Thunderstorms; Breakdown process; Charge Moment Change; fast breakdown; Lightning discharge; Lightning initiation; Positive streamers; Runaway electrons; Thunderstorm electric fields; Electric field measurement; ambient air; avalanche; electric field; geometry; lightning; simulation; thunderstorm |
| 语种 | 英语 |
| 来源期刊 | Geophysical Research Letters
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/170704 |
| 作者单位 | Department of Electrical and Computer Engineering, Duke University, Durham, NC, United States |
| 推荐引用方式 GB/T 7714 | Cummer S.A.. Indirectly Measured Ambient Electric Fields for Lightning Initiation in Fast Breakdown Regions[J],2020,47(4). |
| APA | Cummer S.A..(2020).Indirectly Measured Ambient Electric Fields for Lightning Initiation in Fast Breakdown Regions.Geophysical Research Letters,47(4). |
| MLA | Cummer S.A.."Indirectly Measured Ambient Electric Fields for Lightning Initiation in Fast Breakdown Regions".Geophysical Research Letters 47.4(2020). |
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