气候变化领域集成服务门户(CCPortal): Distinctive Signals in 1-min Observations of Overshooting Tops and Lightning Activity in a Severe Supercell Thunderstorm

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DOI	10.1029/2020JD032856
	Distinctive Signals in 1-min Observations of Overshooting Tops and Lightning Activity in a Severe Supercell Thunderstorm
	Borque P.; Vidal L.; Rugna M.; Lang T.J.; Nicora M.G.; Nesbitt S.W.
发表日期	2020
ISSN	2169897X
卷号	125 期号:20
英文摘要	This work examines a severe weather event that took place over central Argentina on 11 December 2018. The evolution of the storm from its initiation, rapid organization into a supercell, and eventual decay was analyzed with high-temporal resolution observations. This work provides insight into the spatio-temporal co-evolution of storm kinematics (updraft area and lifespan), cloud-top cooling rates, and lightning production that led to severe weather. The analyzed storm presented two convective periods with associated severe weather. An overall decrease in cloud-top local minima IR brightness temperature (MinIR) and lightning jump (LJ) preceded both periods. LJs provided the highest lead time to the occurrence of severe weather, with the ground-based lightning networks providing the maximum warning time of around 30 min. Lightning flash counts from the Geostationary Lightning Mapper (GLM) were underestimated when compared to detections from ground-based lightning networks. Among the possible reasons for GLM's lower detection efficiency were an optically dense medium located above lightning sources and the occurrence of flashes smaller than GLM's footprint. The minimum MinIR provided the shorter warning time to severe weather occurrence. However, the secondary minima in MinIR that preceded the absolute minima improved this warning time by more than 10 min. Trends in MinIR for time scales shorter than 6 min revealed shorter cycles of fast cooling and warming, which provided information about the lifecycle of updrafts within the storm. The advantages of using observations with high-temporal resolution to analyze the evolution and intensity of convective storms are discussed. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	aerosol transport; atmospheric modeling; large eddy simulation (LES); random walk; sea spray generation; upscaled modeling
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/185685
作者单位	Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States; Pacific Northwest National Laboratory, Richland, WA, United States; Servicio Meteorológico Nacional, Buenos Aires, Argentina; NASA/Marshall Space Flight Center, Huntsville, AL, United States; CEILAP - UMI-IFAECI-CNRS 3351, UNIDEF (MINDEF - CONICET), Buenos Aires, Argentina
推荐引用方式 GB/T 7714	Borque P.,Vidal L.,Rugna M.,et al. Distinctive Signals in 1-min Observations of Overshooting Tops and Lightning Activity in a Severe Supercell Thunderstorm[J],2020,125(20).
APA	Borque P.,Vidal L.,Rugna M.,Lang T.J.,Nicora M.G.,&Nesbitt S.W..(2020).Distinctive Signals in 1-min Observations of Overshooting Tops and Lightning Activity in a Severe Supercell Thunderstorm.Journal of Geophysical Research: Atmospheres,125(20).
MLA	Borque P.,et al."Distinctive Signals in 1-min Observations of Overshooting Tops and Lightning Activity in a Severe Supercell Thunderstorm".Journal of Geophysical Research: Atmospheres 125.20(2020).