DOI: 10.1029/2018JD028569
Scopus记录号: 2-s2.0-85052837334
论文题名: Characteristics of Lightning Flashes Associated With the Charge Layer Near the 0 °C Isotherm in the Stratiform Region of Mesoscale onvective Systems
作者: Wang F. ; Liu H. ; Dong W. ; Zhang Y. ; Meng Q.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 17 起始页码: 9524
结束页码: 9541
语种: 英语
英文关键词: bright band
; reflectivity
; stratiform lightning flash
; VHF radiation source
英文摘要: Data from an S-band Doppler radar system and a three-dimensional very high frequency (VHF) radiation source location system in Chongqing, China, were combined to analyze the characteristics of stratiform lightning flashes associated with the charge layer near the 0 °C isotherm (SL0s) in 10 mesoscale convective systems during the summers of 2014–2015. Most of the SL0 events occurred during the dissipating stage of two thunderstorms. The bright band was found to have a very close relationship with the initiation of the SL0 events. The noninductive and inductive charging mechanisms associated with the process of melting ice particles were inferred to contribute to the charge of the bright band area. The reflectivity at the first located VHF radiation source (FirstS) of the SL0s was always weaker than that in the reflectivity core within the lightning area. The stronger the reflectivity core, the greater the difference between the reflectivity and the reflectivity core. The SL0s generated by the thunderstorms with low SL0 frequency tended to have weaker reflectivity at the FirstS but a stronger reflectivity core in the lightning area than that of the thunderstorms with high SL0 frequency. In the storms with low SL0 frequency, SL0s occurred only when the initiation height of the stratiform lightning flashes decreased gradually toward the height range of the SL0s; but in one storm with high SL0 frequency, the SL0s were generated simultaneously with the stratiform lightning flashes initiated at a high level. It gives a clue that the melting charging mechanisms may enhance the charge density of the bright band area. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113173
Appears in Collections: 气候减缓与适应
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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
Recommended Citation:
Wang F.,Liu H.,Dong W.,et al. Characteristics of Lightning Flashes Associated With the Charge Layer Near the 0 °C Isotherm in the Stratiform Region of Mesoscale onvective Systems[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(17)