DOI: 10.1002/grl.50433
论文题名: On the electric breakdown field of the mesosphere and the influence of electron detachment
作者: Neubert T. ; Chanrion O.
刊名: Geophysical Research Letters
ISSN: 0094-9085
EISSN: 1944-8816
出版年: 2013
卷: 40, 期: 10 起始页码: 2373
结束页码: 2377
语种: 英语
英文关键词: atmospheric electricity
; detachment
; electric discharge
; lightning
; mesosphere
; sprite
Scopus关键词: detachment
; Electron avalanches
; Electron detachments
; mesosphere
; Simplifying assumptions
; sprite
; Streamer filaments
; Streamer formation
; Atmospheric electricity
; Electric discharges
; Electric fields
; Lightning
; Electrons
; atmospheric electricity
; avalanche
; electrical method
; electron
; lightning
; mesosphere
; oxygen
; threshold
英文摘要: It has been suggested recently that electron associative detachment from negative atomic oxygen ions provides an additional source of free electrons in electric discharges of the mesosphere, the sprites, and gigantic jets. Here we study attachment under some simplifying assumptions and show that the threshold field decreases with time and can reach values well below the conventional threshold field. The concept of a fixed threshold field therefore itself breaks down. We find that the growth rate decreases with decreasing electric field and that long exposure time of electric fields therefore is needed for electron avalanches to grow. Detachment is likely to affect the conductivity of streamer filaments and other long-lasting space charge structures like gigantic jets or the ionization state of the mesosphere when illuminated by thunderstorm fields. Detachment by itself does not directly affect small-scale streamer formation or explain the time delays of sprites as proposed by others. © 2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879972234&doi=10.1002%2fgrl.50433&partnerID=40&md5=702ed6a4bf53ad5621d79c01030e3085
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6349
Appears in Collections: 气候减缓与适应
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作者单位: National Space Institute, Technical University of Denmark (DTU Space), Building 328, Kgs. Lyngby, DK-2800, Denmark
Recommended Citation:
Neubert T.,Chanrion O.. On the electric breakdown field of the mesosphere and the influence of electron detachment[J]. Geophysical Research Letters,2013-01-01,40(10).