气候变化领域集成服务门户(CCPortal): Vertical reflectivity structures near lightning flashes in the stratiform regions of mesoscale convective systems

CCPortal

DOI	10.1016/j.atmosres.2020.104961
	Vertical reflectivity structures near lightning flashes in the stratiform regions of mesoscale convective systems
	Wang F.; Zhang Y.; Liu H.; Dong W.; Yao W.; Zheng D.
发表日期	2020
ISSN	0169-8095
卷号	242
英文摘要	Using an S-band Doppler radar and a very high frequency (VHF) radiation source location system, 254 lightning flashes occurring in stratiform regions (stratiform lightning flashes) of 14 mesoscale convective systems (MCSs) in Chongqing, China, were observed and used to analyze the structure of vertical reflectivity in the area around the lightning channel. In most stratiform lightning flashes, the vertical reflectivity structures can be grouped into three general categories: single-layer, double-layer, and triple-layer. The single-layer structure flashes are the most numerous (65.0%), followed by the double-layer (26.8%) and triple-layer (1.2%) flashes. The regions with the single-layer structure and the double-layer structure are inferred to have mesoscale updrafts of different intensity in the middle of stratiform region. Around 62.3% of the single-layer structure flashes initiate within 0–4 km above the vertical reflectivity core, and the main initiation range of these flashes widens with increasing value of the vertical reflectivity core. Around 49.2% and 12.7% of the double-layer structure flashes initiate within 3–6 km and 1–2 km above the vertical reflectivity core, respectively. The probability of lightning initiation at a greater distance to the vertical reflectivity core is higher than that at a shorter distance. This may imply that some electrifications occurring during the melting process are not as strong as expected and a non-riming non-inductive charging process occurring in a weak but broad mesoscale updraft in the middle of stratifom region may be more important for initiation of stratiform lightning flashes. © 2020 Elsevier B.V.
英文关键词	Lightning initiation; Melting level; Reflectivity layer; Stratiform lightning flashes; Vertical reflectivity structure
语种	英语
scopus关键词	Dielectric materials; Doppler radar; Lightning; Reflection; Double layer structure; Lightning channel; Lightning initiation; Mesoscale Convective System; Non-inductive charging; Reflectivity structures; Single-layer structure; Very high frequency; Storms; convective system; Doppler radar; lightning; mesoscale meteorology; reflectivity; stratiform cloud; updraft; China; Chongqing
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/141902
作者单位	State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences (CAMS), Beijing, China; Laboratory of Lightning Physics and Protection Engineering, CAMS, Beijing, China; Institute of Atmospheric Sciences, FuDan University and Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
推荐引用方式 GB/T 7714	Wang F.,Zhang Y.,Liu H.,et al. Vertical reflectivity structures near lightning flashes in the stratiform regions of mesoscale convective systems[J],2020,242.
APA	Wang F.,Zhang Y.,Liu H.,Dong W.,Yao W.,&Zheng D..(2020).Vertical reflectivity structures near lightning flashes in the stratiform regions of mesoscale convective systems.Atmospheric Research,242.
MLA	Wang F.,et al."Vertical reflectivity structures near lightning flashes in the stratiform regions of mesoscale convective systems".Atmospheric Research 242(2020).