气候变化领域集成服务门户(CCPortal): GLM Observations of the Brightest Lightning in the Americas

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DOI	10.1029/2020JD033378
	GLM Observations of the Brightest Lightning in the Americas
	Peterson M.; Lay E.
发表日期	2020
ISSN	2169897X
卷号	125 期号:23
英文摘要	Two years of Geostationary Lightning Mapper (GLM) science data are used to document the brightest lighting flashes observed on the Americas continent. The most radiant optical lightning emissions—termed “superbolts”—were first identified by the Vela satellite constellation in the 1970s (Turman, 1977, https://doi.org/10.1029/JC082i018p02566) and are defined in terms of peak optical power. GLM is an integrating sensor that, instead, measures the total optical energy from a lightning pulse. While GLM might not correctly classify short-duration superbolts, its top lightning cases certainly fall in the superbolt category, and the wealth of GLM measurements over its stationary hemispheric field of view provide an unmatched sample of extraordinarily bright lightning. While radiant bolts in excess of 100× the optical energy of typical lightning are ubiquitous across the Americas and result from many types of lightning processes, we find the most radiant cases (>1,000×) are concentrated in the central United States and in the La Plata basin in South America. Coincident Earth Networks Global Lightning Network (ENGLN) observations reveal that these extremely bright emissions usually result from + CG strokes with high peak currents in long horizontal flashes outside of the convective core. Single cases of these megaflashes might produce multiple superbolts over their durations. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	GLM; GOES; lightning; satellite; superbolts
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/185619
作者单位	ISR-2, Los Alamos National Laboratory, Los Alamos, NM, United States
推荐引用方式 GB/T 7714	Peterson M.,Lay E.. GLM Observations of the Brightest Lightning in the Americas[J],2020,125(23).
APA	Peterson M.,&Lay E..(2020).GLM Observations of the Brightest Lightning in the Americas.Journal of Geophysical Research: Atmospheres,125(23).
MLA	Peterson M.,et al."GLM Observations of the Brightest Lightning in the Americas".Journal of Geophysical Research: Atmospheres 125.23(2020).