气候变化领域集成服务门户(CCPortal): On the Emergence Mechanism of Carrot Sprites

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DOI	10.1029/2019GL085776
	On the Emergence Mechanism of Carrot Sprites
	Malagón-Romero A.; Teunissen J.; Stenbaek-Nielsen H.C.; McHarg M.G.; Ebert U.; Luque A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:1
英文摘要	We investigate the launch of negative upward streamers from sprite glows. This phenomenon is readily observed in high-speed observations of sprites and underlies the classification of sprites into carrot or column types. First, we describe how an attachment instability leads to a sharply defined region in the upper part of the streamer channel. This region has an enhanced electric field, low conductivity and strongly emits in the first positive system of molecular nitrogen. We identify it as the sprite glow. We then show how, in the most common configuration of a carrot sprite, several upward streamers emerge close to the lower boundary of the glow, where negative charge gets trapped and the lateral electric field is high enough. These streamers cut off the current flowing toward the glow and lead to the optical deactivation of the glow above. Finally, we discuss how our results naturally explain angel sprites. ©2019. The Authors.
英文关键词	Earth sciences; Geophysics; angel sprite; carrot sprite; High speed observation; Lateral electric field; Low conductivity; Molecular nitrogen; Positive systems; upward streamer; Electric fields; classification; column; electric field; electrical conductivity; instability; nitrogen; sprite; Daucus carota
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170871
作者单位	IAA-CSIC, Granada, Spain; Multiscale Dynamics group, Centrum Wiskunde & Informatica (CWI), Amsterdam, Netherlands; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States; Department of Physics, United States Air Force Academy, Colorado Springs, CO, United States; Department of Applied Physics, Eindhoven University of Technology, Eindhoven, Netherlands
推荐引用方式 GB/T 7714	Malagón-Romero A.,Teunissen J.,Stenbaek-Nielsen H.C.,et al. On the Emergence Mechanism of Carrot Sprites[J],2020,47(1).
APA	Malagón-Romero A.,Teunissen J.,Stenbaek-Nielsen H.C.,McHarg M.G.,Ebert U.,&Luque A..(2020).On the Emergence Mechanism of Carrot Sprites.Geophysical Research Letters,47(1).
MLA	Malagón-Romero A.,et al."On the Emergence Mechanism of Carrot Sprites".Geophysical Research Letters 47.1(2020).