气候变化领域集成服务门户(CCPortal): Dart-Leader and K-Leader Velocity From Initiation Site to Termination Time-Resolved With 3D Interferometry

CCPortal

DOI	10.1029/2020JD034309
	Dart-Leader and K-Leader Velocity From Initiation Site to Termination Time-Resolved With 3D Interferometry
	Jensen D.P.; Sonnenfeld R.G.; Stanley M.A.; Edens H.E.; da Silva C.L.; Krehbiel P.R.
发表日期	2021
ISSN	2169897X
卷号	126 期号:9
英文摘要	Simultaneous data from two interferometers separated by 16 km and synchronized within 100 ns were collected for a thunderstorm near Langmuir Lab on October 23, 2018. Analysis via triangulation followed by a least squares fit to time of arrival across all six antennae produced a three-dimensional interferometer (3DINTF) data set. Simultaneous Lightning Mapping Array data enabled an independent calculation of 3DINTF accuracy, yielding a median location uncertainty of 200 m. This is the most accurate verified result to date for a two-station interferometer. The 3D data allowed profiling the velocity of multiple dart leaders and K leaders that followed the same channel. 3D velocities calculated from the in-cloud initiation site to ground ranged from 3 × 106 to 20 × 106 m/s. Average velocity generally increased with subsequent leaders, consistent with increased conditioning of the channel. Also, all leaders showed a factor of 2–3 decrease in velocity as they proceeded over 15 km of channel. We speculate that the velocity decrease is consistent with energy lost in the reionization of the channel at the leader tip. This paper includes an appendix providing details of the triangulation technique used. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	conditioning; dart leader; INTF; K leader; lightning; LMA; recoil leader
语种	英语
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/185247
作者单位	Langmuir Laboratory for Atmospheric Research, New Mexico Institute of Mining and Technology, Socorro, NM, United States
推荐引用方式 GB/T 7714	Jensen D.P.,Sonnenfeld R.G.,Stanley M.A.,et al. Dart-Leader and K-Leader Velocity From Initiation Site to Termination Time-Resolved With 3D Interferometry[J],2021,126(9).
APA	Jensen D.P.,Sonnenfeld R.G.,Stanley M.A.,Edens H.E.,da Silva C.L.,&Krehbiel P.R..(2021).Dart-Leader and K-Leader Velocity From Initiation Site to Termination Time-Resolved With 3D Interferometry.Journal of Geophysical Research: Atmospheres,126(9).
MLA	Jensen D.P.,et al."Dart-Leader and K-Leader Velocity From Initiation Site to Termination Time-Resolved With 3D Interferometry".Journal of Geophysical Research: Atmospheres 126.9(2021).