气候变化领域集成服务门户(CCPortal): Lightning and Secondary Convection in the Anvil of the May 29, 2012 Oklahoma Supercell Storm Observed by DC3

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DOI	10.1029/2020JD033114
	Lightning and Secondary Convection in the Anvil of the May 29, 2012 Oklahoma Supercell Storm Observed by DC3
	DiGangi E.A.; Ziegler C.L.; MacGorman D.R.
发表日期	2021
ISSN	2169897X
卷号	126 期号:3
英文摘要	A supercell thunderstorm formed as part of a cluster of severe storms near Kingfisher, Oklahoma on May 29, 2012 during the Deep Convective Clouds and Chemistry field experiment. This storm produced 5 hail, an EF-1 tornado, and copious lightning over the course of a few hours within range of the Oklahoma Lightning Mapping Array and the KTLX WSR-88D radar. This study focuses on a ∼1-h interval during which a line of secondary convection formed and intensified within the anvil of the Kingfisher supercell. An analysis of radar reflectivity, radial velocity, and low-level divergence shows that the formation of the secondary convection was consistent with a previously proposed mechanism; the instability leading to the convection was initiated by diabatic cooling in dry air below the anvil from sublimation, melting and evaporation of virga falling from the anvil, coincident with weak rising motion above a surface outflow boundary adjacent to the sub-anvil downdraft. Prior to the formation of the secondary convection, flashes extended up to 60 km from the deep convection into the anvil. After the line of secondary convection formed, it initiated long lightning flashes that propagated along the line, and it continued to produce lightning as it moved eastward out from under the anvil. The charge structure inferred from flashes in the parent storm and in the downstream anvil suggests that charge was separated locally in the anvil following the development of an outflow boundary by the Kingfisher storm, which also contributed to the initiation of the secondary convection. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	atmospheric electricity; convective processes; lightning; storm electrification; supercells; thunderstorms
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/185513
作者单位	Earth Networks, Germantown, MD, United States; NOAA/OAR/National Severe Storms Laboratory, Norman, OK, United States; Cooperative Institute for Mesoscale Meteorological Studies, Norman, OK, United States; University of Oklahoma, Norman, OK, United States
推荐引用方式 GB/T 7714	DiGangi E.A.,Ziegler C.L.,MacGorman D.R.. Lightning and Secondary Convection in the Anvil of the May 29, 2012 Oklahoma Supercell Storm Observed by DC3[J],2021,126(3).
APA	DiGangi E.A.,Ziegler C.L.,&MacGorman D.R..(2021).Lightning and Secondary Convection in the Anvil of the May 29, 2012 Oklahoma Supercell Storm Observed by DC3.Journal of Geophysical Research: Atmospheres,126(3).
MLA	DiGangi E.A.,et al."Lightning and Secondary Convection in the Anvil of the May 29, 2012 Oklahoma Supercell Storm Observed by DC3".Journal of Geophysical Research: Atmospheres 126.3(2021).