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DOI	10.1029/2020JD033648
	Meteorological and Electrical Conditions of Two Mid-latitude Thunderstorms Producing Blue Discharges
	Liu F.; Zhu B.; Lu G.; Lei J.; Shao J.; Chen Y.; Huang A.; Ma M.; Qin Z.; Zhong J.; Ren H.; Wang Z.; Wan Z.; Liu G.; Peng C.; Peng K.-M.; Zhou H.
发表日期	2021
ISSN	2169897X
卷号	126 期号:8
英文摘要	Blue discharges are one type of rarely observed upward discharge emerging from the top of thunderstorms. The favorable meteorological conditions and charge structures needed to produce this marvelous phenomenon are still poorly understood. In this study, we report on two midlatitude thunderstorms producing 13 blue discharges observed simultaneously by the Imager of Sprites and Upper Atmospheric Lightning (ISUAL) and ground-based lightning detection array. In these two thunderstorms, blue discharges always occurred in the vicinity of the coldest cloud top (∼195 K) and clustered within a bounded area near the convective surge, leading to the overshooting thundercloud top (reaching about 18 km) into the stratosphere. The parent thunderstorms were normally electrified with a main midlevel negative and an upper positive charge layer centered at about 15 km as inferred from source heights of narrow bipolar events (NBEs). The associated negative NBEs near the tropopause indicated that they are upward positive discharges initiated between the upper positive charge layer and the negative screening layer at the cloud top. In addition, the outbreak of negative NBEs in the altitude range of 16–18 km was observed in conjunction with blue discharges observed from space. This suggests that there exists a strong upper positive layer with an intense convection at this altitude of the thunderstorm. It is inferred that an overshooting thundercloud top with intense convective updraft could lead to a strong and high upper positive charge layer and therefore create favorable charge structures for initiating upward positive blue discharges. © 2021. The Authors.
英文关键词	blue discharges; deep convection; narrow bipolar events (NBEs); overshooting thundercloud top
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/185277
作者单位	CAS Key Laboratory of Geo-Space Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China; Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei, China; Guangdong-Hongkong-Macao Greater Bay Area Weather Research Center for Monitoring Warning and Forecasting (Shenzhen Institute of Meteorological Innovation), Shenzhen, China; Planetary Environmental and Astrobiological Research Laboratory, School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, China; Department of Physics, National Cheng Kung University, Tainan, Taiwan; Provinn AB, Gothenburg, Sweden
推荐引用方式 GB/T 7714	Liu F.,Zhu B.,Lu G.,et al. Meteorological and Electrical Conditions of Two Mid-latitude Thunderstorms Producing Blue Discharges[J],2021,126(8).
APA	Liu F..,Zhu B..,Lu G..,Lei J..,Shao J..,...&Zhou H..(2021).Meteorological and Electrical Conditions of Two Mid-latitude Thunderstorms Producing Blue Discharges.Journal of Geophysical Research: Atmospheres,126(8).
MLA	Liu F.,et al."Meteorological and Electrical Conditions of Two Mid-latitude Thunderstorms Producing Blue Discharges".Journal of Geophysical Research: Atmospheres 126.8(2021).