气候变化领域集成服务门户(CCPortal): Bidirectional Recoil Leaders in Upward Lightning Flashes Observed at the Säntis Tower

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DOI	10.1029/2021JD035238
	Bidirectional Recoil Leaders in Upward Lightning Flashes Observed at the Säntis Tower
	Sunjerga A.; Rubinstein M.; Azadifar M.; Mostajabi A.; Rachidi F.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:18
英文摘要	We report the observation of three negative upward flashes recorded by a high-speed camera at the Säntis Tower during the Summer of 2019. The camera was operating at 10,000 fps and an exposure time of 99 μs. Simultaneous measurements of the lightning current were obtained for all three flashes. The close electric field was measured for one of the observed flashes, which was analyzed in detail. In this flash, we observed 50 recoil leaders developing in the decayed channel with speeds characteristic of dart leader processes. Out of the 50 recoil leaders, 45 ended up as attempted leaders, three developed into M-component-type ICC (initial continuous current) processes, and two into return strokes. This study reveals that depending on the spatial and temporal properties of electric field in the area of the event and the main channel condition, recoil leaders can develop into different processes in upward negative lightning flashes such as attempted leaders, M-components, M-component-type ICC events, mixed mode pulses, or return strokes. We observed M-component-type ICC events with junction heights as low as 137 m, while all of the observed mixed mode pulses seemed to attach directly to the structure. Bidirectional propagation of the recoil leader was also observed. © 2021 The Authors.
英文关键词	bidirectional; high-speed camera; recoil leader; Säntis Tower; upward
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237008
作者单位	Electromagnetic Compatibility Laboratory, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland; University of Applied Sciences of Western Switzerland (HES-SO), Yverdon-les-Bains, Switzerland
推荐引用方式 GB/T 7714	Sunjerga A.,Rubinstein M.,Azadifar M.,et al. Bidirectional Recoil Leaders in Upward Lightning Flashes Observed at the Säntis Tower[J],2021,126(18).
APA	Sunjerga A.,Rubinstein M.,Azadifar M.,Mostajabi A.,&Rachidi F..(2021).Bidirectional Recoil Leaders in Upward Lightning Flashes Observed at the Säntis Tower.Journal of Geophysical Research: Atmospheres,126(18).
MLA	Sunjerga A.,et al."Bidirectional Recoil Leaders in Upward Lightning Flashes Observed at the Säntis Tower".Journal of Geophysical Research: Atmospheres 126.18(2021).