气候变化领域集成服务门户(CCPortal): Examining Conditions Supporting the Development of Anomalous Charge Structures in Supercell Thunderstorms in the Southeastern United States

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DOI	10.1029/2021JD034582
	Examining Conditions Supporting the Development of Anomalous Charge Structures in Supercell Thunderstorms in the Southeastern United States
	Stough S.M.; Carey L.D.; Schultz C.J.; Cecil D.J.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:16
英文摘要	Hypotheses regarding favorable conditions for anomalous charging have primarily resulted from studies within the Great Plains region of the United States, where the efficiency of warm precipitation processes is thought to be fundamental. Rare observations of anomalous charge structures in the Southeastern region challenge existing conceptual models used to explain anomalous charging. As a rigorous evaluation of conditions that support anomalous charge structures, environmental characteristics and bulk kinematic and microphysical properties of two normal and two anomalous supercell thunderstorms observed in the Southeast were compared. Within the anomalous supercells, greater quantities of precipitation ice were identified at higher altitudes and colder temperatures, suggesting a greater depth of riming growth and increased vertical transport of rimed hydrometeors. Deeper anomalous supercell updrafts were larger and stronger in the upper mixed-phase and glaciated regions. However, normal supercells were characterized by more robust low-level updrafts, resulting in comparable warm cloud residence times that suggested warm precipitation processes were not necessarily less efficient in the anomalous supercells. Indications of enhanced mixed-phase liquid water content in favor of anomalous charging were observed in the anomalous supercells, though contrasts in related environmental parameters were not as large as observed in other comparative studies. Anomalous supercell environments were characterized by increased instability, shallower warm cloud depth, as well as lower relative humidity in the 700–500 mb layer. Evidence of impacts from dry air in anomalous storm structures suggested that water vapor content may have affected particle-scale charge transfer in support of anomalous charge structure development. © 2021. The Authors. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
英文关键词	anomalous charge structure; atmospheric electricity; lightning; precipitation microphysics; supercell kinematics; supercell thunderstorm
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/237072
作者单位	Department of Atmospheric and Earth Science, The University of Alabama in Huntsville, Huntsville, AL, United States; Now at Earth System Science Center, The University of Alabama in Huntsville, Huntsville, AL, United States; Earth Science Office, Marshall Space Flight Center, National Aeronautics and Space Administration, Huntsville, AL, United States
推荐引用方式 GB/T 7714	Stough S.M.,Carey L.D.,Schultz C.J.,et al. Examining Conditions Supporting the Development of Anomalous Charge Structures in Supercell Thunderstorms in the Southeastern United States[J],2021,126(16).
APA	Stough S.M.,Carey L.D.,Schultz C.J.,&Cecil D.J..(2021).Examining Conditions Supporting the Development of Anomalous Charge Structures in Supercell Thunderstorms in the Southeastern United States.Journal of Geophysical Research: Atmospheres,126(16).
MLA	Stough S.M.,et al."Examining Conditions Supporting the Development of Anomalous Charge Structures in Supercell Thunderstorms in the Southeastern United States".Journal of Geophysical Research: Atmospheres 126.16(2021).