气候变化领域集成服务门户(CCPortal): Electrical evolution of a rapidly developing MCS during its vigorous vertical growth phase

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DOI	10.1016/j.atmosres.2020.105201
	Electrical evolution of a rapidly developing MCS during its vigorous vertical growth phase
	Chen Z.; Qie X.; Yair Y.; Liu D.; Xiao X.; Wang D.; Yuan S.
发表日期	2020
ISSN	0169-8095
卷号	246
英文摘要	This study examined the coevolution of storm structure and electrical behavior of a rapidly developing mesoscale convective system (MCS) over Beijing metropolitan region during its vigorous growth phase based on observations and model simulations. When the isolated convection grew upscale and developed into a larger and organized MCS, it is found that the lightning production increased much faster than storm volume growth. Although the overall MCS went through rapid intensification, large differences exist in the radar reflectivity pattern of its convective cell members indicating their differential convective states. Several distribution peaks of lightning radiation pulses are also observed in the vertical direction, suggesting the overall complicated charge distribution inside the MCS. Given the decreased distances among cells during the upscale growth, it is hypothesized that such complicated charge distributions are more conducive to local high electric fields for lightning initiations and hence increased lightning production rates. The electrification-coupled WRF simulations support this proposed hypothesis, which clearly show that the MCS evolves from two layered charge regions to more complicated charge distributions. When some convective cells consisting of the MCS develop toward maturity, the precipitation particles descend to low levels and give rise to a lower positive charge region that is embedded inside a deep-layer negative charge region. In combination with enhanced interactions among the cells, a peak of electric field magnitude is generated at lower levels due to the approaching charge regions with opposite polarities, such that more lightning flashes are produced. © 2020 Elsevier B.V.
英文关键词	CFADs; Charge structure; Lightning flash; MCS; WRF
语种	英语
scopus关键词	Charge distribution; Cytology; Storms; Electric field magnitude; Electrical behaviors; High electric fields; Lightning initiation; Mesoscale Convective System; Metropolitan regions; Radar reflectivity patterns; Rapid intensification; Lightning; atmospheric electricity; convective system; electric field; lightning; mesoscale meteorology; metropolitan area; precipitation (climatology); Beijing [China]; China
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141778
作者单位	Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; College of Earth and Planetary Science, University of Chinese Academy of Sciences, Beijing, 100049, China; Interdisciplinary Center (IDC) Herzliya, Israel; Beijing Urban Meteorological Engineering Research Center, Beijing, China
推荐引用方式 GB/T 7714	Chen Z.,Qie X.,Yair Y.,et al. Electrical evolution of a rapidly developing MCS during its vigorous vertical growth phase[J],2020,246.
APA	Chen Z..,Qie X..,Yair Y..,Liu D..,Xiao X..,...&Yuan S..(2020).Electrical evolution of a rapidly developing MCS during its vigorous vertical growth phase.Atmospheric Research,246.
MLA	Chen Z.,et al."Electrical evolution of a rapidly developing MCS during its vigorous vertical growth phase".Atmospheric Research 246(2020).