气候变化领域集成服务门户(CCPortal): Characteristics of Negative Leader Propagation Area of Lightning Flashes Initiated in the Stratiform Regions of Mesoscale Convective Systems

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DOI	10.1029/2020JD033336
	Characteristics of Negative Leader Propagation Area of Lightning Flashes Initiated in the Stratiform Regions of Mesoscale Convective Systems
	Wang F.; Zhang Y.; Dong W.; Liu H.; Li F.; Yao W.
发表日期	2021
ISSN	2169897X
卷号	126 期号:3
英文摘要	To investigate the characteristics of extension areas (mainly the propagation areas of negative leaders in this study), the lightning location data of 254 lightning flashes initiated in the stratiform regions (stratiform lightning flashes) of 14 mesoscale convective systems (MCSs) are analyzed. The results show that most of the flashes have a relatively small lightning area (LA) (≤100 km2), although they are initiated in the stratiform regions. In small or developing MCSs, most negative leaders of stratiform lightning flashes concentrate within the 9–12-km altitude range. In other MCSs with a large-sized and developed stratiform region, besides being in this high-altitude range, the negative leaders are also found to propagate more frequently in a low-altitude range of 5–7 km. Further analysis indicates that most of the stratiform lightning flashes with a large LA (>100 km2) propagate their negative leaders within the high-altitude range, no matter where they are initiated. Moreover, the stratiform lightning flashes with or near the largest LA tend to be initiated 4–6 km below their negative leaders, while most of the stratiform lightning flashes usually propagate their negative leaders horizontally within ±1 km of the first detected very-high-frequency (VHF) radiation source. It is inferred that some in-situ electrifications occurring before and during the formation of the high reflectivity layers in the low-altitude range contribute to these flashes, although the influence of the advection charges from the convective regions still cannot be totally ruled out. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	first detected VHF radiation source; lightning flashes; mesoscale convective systems; propagation area of negative leaders; stratiform regions
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/185504
作者单位	State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences (CAMS), Beijing, China; Laboratory of Lightning Physics and Protection Engineering, CAMS, Beijing, China; Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai, China; CMA-FDU Joint Laboratory of Marine Meteorology, Shanghai, China
推荐引用方式 GB/T 7714	Wang F.,Zhang Y.,Dong W.,et al. Characteristics of Negative Leader Propagation Area of Lightning Flashes Initiated in the Stratiform Regions of Mesoscale Convective Systems[J],2021,126(3).
APA	Wang F.,Zhang Y.,Dong W.,Liu H.,Li F.,&Yao W..(2021).Characteristics of Negative Leader Propagation Area of Lightning Flashes Initiated in the Stratiform Regions of Mesoscale Convective Systems.Journal of Geophysical Research: Atmospheres,126(3).
MLA	Wang F.,et al."Characteristics of Negative Leader Propagation Area of Lightning Flashes Initiated in the Stratiform Regions of Mesoscale Convective Systems".Journal of Geophysical Research: Atmospheres 126.3(2021).