气候变化领域集成服务门户(CCPortal): Space-Based Observation of a Negative Sprite With an Unusual Signature of Associated Sprite Current

CCPortal

DOI	10.1029/2020JD033686
	Space-Based Observation of a Negative Sprite With an Unusual Signature of Associated Sprite Current
	Wang Y.; Lu G.; Peng K.-M.; Ma M.; Cummer S.A.; Chen A.B.; Zhu B.
发表日期	2021
ISSN	2169897X
卷号	126 期号:4
英文摘要	We report the first observation of an unusual red sprite produced by negative cloud-to-ground (CG) lightning from the Imager of Sprites and Upper Atmospheric Lightning (ISUAL) in Colombia on August 15, 2012. The impulse charge moment change for this event is approximately −520 C·km, barely reaching the threshold for negative sprite production. However, different from all previously reported observations, this negative sprite contains a distinct “sprite current” feature that is unambiguously identified in the very-low-frequency magnetic field recorded at the 3,387 km range in Duke Forest. There is no evidence that this feature was produced by a fast discharging process associated with the causative CG stroke. Instead, the sprite current signal corresponds well to high-altitude optical emissions associated with the charge flow in the sprite body. The charge moment change caused by the charge transfer in the sprite region was estimated to be about −460 C·km. We attempt to reveal the possible causes of this atypical event from the perspective of the parent thunderstorm and the local ionosphere irregularities, whereas we believe that the most possible reason remains to lie in an extraordinarily long duration (more than 5 ms) of charge transfer to ground following the return stroke. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	impulse charge moment change; negative sprite; sprite current; thunderstorm
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/185479
作者单位	School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, China; Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei, Anhui, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China; Electrical and Computer Engineering Department, Duke University, Durham, NC, United States; Department of Physics, National Cheng Kung University, Tainan, Taiwan
推荐引用方式 GB/T 7714	Wang Y.,Lu G.,Peng K.-M.,et al. Space-Based Observation of a Negative Sprite With an Unusual Signature of Associated Sprite Current[J],2021,126(4).
APA	Wang Y..,Lu G..,Peng K.-M..,Ma M..,Cummer S.A..,...&Zhu B..(2021).Space-Based Observation of a Negative Sprite With an Unusual Signature of Associated Sprite Current.Journal of Geophysical Research: Atmospheres,126(4).
MLA	Wang Y.,et al."Space-Based Observation of a Negative Sprite With an Unusual Signature of Associated Sprite Current".Journal of Geophysical Research: Atmospheres 126.4(2021).