| DOI: | 10.1002/2015GL067364
|
| 论文题名: | Subionospheric propagation and peak currents of preliminary breakdown pulses before negative cloud-to-ground lightning discharges |
| 作者: | Kolmašová I.; Santolík O.; Farges T.; Cummer S.A.; Lán R.; Uhlíř L.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-9429
|
| EISSN: | 1944-9160
|
| 出版年: | 2016
|
| 卷: | 43, 期:3 | | 起始页码: | 1382
|
| 结束页码: | 1391
|
| 语种: | 英语
|
| 英文关键词: | FDTD model
; preliminary breakdown pulses
; subionospheric propagation
|
| Scopus关键词: | Electric discharges
; Electric fields
; Finite difference time domain method
; Gamma rays
; Ionosphere
; Lightning
; Cloud-to-ground lightning
; Cloud-to-ground lightning flash
; Earth ionosphere waveguide
; Electromagnetic measurement
; FDTD model
; Preliminary breakdown pulses
; Strong electric fields
; Terrestrial Gamma ray Flashes
; Clouds
; atmospheric electricity
; cloud to ground lightning
; electromagnetic field
; electromagnetic method
; electromagnetic wave
; gamma ray radiation
; ionosphere
; measurement method
; numerical model
; thunderstorm
; waveform analysis
|
| 英文摘要: | We analyze broadband electromagnetic measurements of pulse sequences occurring prior to first return strokes of negative cloud-to-ground lightning flashes. Signals generated by lightning discharges were recorded close to the thunderstorm by a magnetic field receiver and traveled up to 600 km to three distant electric field receivers. We found that amplitudes of observed preliminary breakdown pulses, as well as amplitudes of the corresponding return strokes, are attenuated approximately by 2 dB/100 km when propagating in the Earth-ionosphere waveguide over mountainous terrain. Propagation simulations show that there is a significant contribution of the sky wave signals in the waveforms observed beyond 500 km from their source. The estimated peak currents of the largest preliminary breakdown pulses reach over 60 kA. Such current pulses propagating through in-cloud lightning leader channels in a strong electric field may be able to initiate terrestrial gamma ray flashes. © 2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84975763724&doi=10.1002%2f2015GL067364&partnerID=40&md5=28c53c889510fa5852f43b72bd07c85f
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/10392
|
| 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: | Institute of Atmospheric Physics, CAS, Prague, Czech Republic
|
| Recommended Citation: | |
Kolmašová I.,Santolík O.,Farges T.,et al. Subionospheric propagation and peak currents of preliminary breakdown pulses before negative cloud-to-ground lightning discharges[J]. Geophysical Research Letters,2016-01-01,43(3).
|
|
|