| DOI: | 10.1002/grl.50596
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| 论文题名: | Vertical structuring of gigantic jets |
| 作者: | Da Silva C.L.; Pasko V.P.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8908
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| EISSN: | 1944-8639
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| 出版年: | 2013
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| 卷: | 40, 期:12 | | 起始页码: | 3315
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| 结束页码: | 3319
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| 语种: | 英语
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| 英文关键词: | blue jet
; gigantic jet
; leader
; lightning
; streamer
; streamer-to-leader
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| Scopus关键词: | Air heating
; Intracloud discharge
; Keypoints
; leader
; streamer
; streamer-to-leader
; Dynamic models
; Ionospheric measurement
; Lightning
; Ionosphere
; acceleration
; airflow
; altitude
; atmospheric electricity
; ionosphere
; lightning
; thundercloud
; vertical movement
|
| 英文摘要: | Gigantic Jets (GJs) are initiated deep inside the thundercloud as intracloud discharges whose upward-directed leaders manage to escape through the thundercloud top and propagate up to the ionosphere. The speed at which leaders propagate is limited by the air heating of every newly formed leader section, rate of which is slower at upper altitudes in the Earth's atmosphere. Despite the expected deceleration of an upward-directed leader, GJs are observed to accelerate as they approach the ionosphere. In this letter, we discuss the dependence of the leader speed on current density in the leader stem, and we propose a simple time-dynamic model for GJ propagation that includes the effects of the expansion of the streamer zone adjacent to the leader head. We propose that the GJ acceleration is a consequence of its vertical structuring and, therefore, can be used to trace the transition altitude between the leader and streamer zone sections of GJs. Key Points Time-dynamic model of Gigantic Jet development Gigantic Jet acceleration as evidence of its vertical structuring Dependence of leader speed on the current density in the leader stem ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880548847&doi=10.1002%2fgrl.50596&partnerID=40&md5=396dd24de8786e413c701900bdd9248a
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6172
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| Appears in Collections: | 气候减缓与适应
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作者单位: | CSSL, Department of Electrical Engineering, Pennsylvania State University, 227 EE East, University Park, PA 16802-2706, United States
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| Recommended Citation: | |
Da Silva C.L.,Pasko V.P.. Vertical structuring of gigantic jets[J]. Geophysical Research Letters,2013-01-01,40(12).
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