| DOI: | 10.1002/2015GL065228
|
| 论文题名: | Lightning leader altitude progression in terrestrial gamma-ray flashes |
| 作者: | Cummer S.A.; Lyu F.; Briggs M.S.; Fitzpatrick G.; Roberts O.J.; Dwyer J.R.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-9494
|
| EISSN: | 1944-9225
|
| 出版年: | 2015
|
| 卷: | 42, 期:18 | | 起始页码: | 7792
|
| 结束页码: | 7798
|
| 语种: | 英语
|
| 英文关键词: | lightning
; terrestrial gamma ray flash
|
| Scopus关键词: | Balloons
; Lightning
; Absolute timing
; Average velocity
; Critical questions
; Lightning channel
; Lightning leader
; Lightning process
; Radio emission
; Terrestrial Gamma ray Flashes
; Gamma rays
; accuracy assessment
; emission
; gamma ray radiation
; lightning
; radio wave
; satellite data
; thunderstorm
|
| 英文摘要: | Radio emissions continue to provide insight into the production of terrestrial gamma ray flashes (TGFs) by thunderstorms, including the critical question of the conditions under which they are generated. We have identified several TGF-associated lightning radio emissions in which the altitudes of in-cloud lightning leader pulses that precede and follow the TGF can be measured. We combine these with high absolute timing accuracy TGF observations from the Fermi satellite to determine the development of the lightning channel before, during, and after the TGF production. All of these TGFs were produced several milliseconds after the leader had initiated and when the leaders reached 1-2 km in length. After the TGFs, the leaders all continued to ascend for several more kilometers with no dramatic change in their characteristics, although they all exhibited high average velocities of 0.8-1.0 × 106 m/s. Implications in the context of TGF models are discussed. These results paint the first clear picture of the lightning processes that occur before, during, and after TGF production. © 2015 American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945461080&doi=10.1002%2f2015GL065228&partnerID=40&md5=d112f349becdcc8537785fb0e7618c4a
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9109
|
| Appears in Collections: | 科学计划与规划
气候变化与战略
|
|
There are no files associated with this item.
|
|
作者单位: | Electrical and Computer Engineering Department, Duke University, Durham, NC, United States
|
| Recommended Citation: | |
Cummer S.A.,Lyu F.,Briggs M.S.,et al. Lightning leader altitude progression in terrestrial gamma-ray flashes[J]. Geophysical Research Letters,2015-01-01,42(18).
|
|
|