Electrical Alignment Signatures of Ice Particles Before Intracloud Lightning Activity Detected by Dual-Polarized Phased Array Weather Radar

Wang, Shuo; Wada, Yuuki; Hayashi, Syugo et al.

Journal of Geophysical Research: Atmospheres, 2024, 129(7), e2023JD039942

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Identifier to cite or link to this item: https://hdl.handle.net/11094/95796

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Title
Electrical Alignment Signatures of Ice Particles Before Intracloud Lightning Activity Detected by Dual-Polarized Phased Array Weather Radar
Creator
CreatorName
Wang, Shuo
NRID
1000040879144 1000040879144
ORCID
0000-0001-8953-3345 0000-0001-8953-3345
researchmap permalink
yuuki_wada yuuki_wada
Scopus Author ID
57188929986 57188929986
CreatorName
Wada, Yuuki
NRID
1000020354441 1000020354441
CreatorName
Hayashi, Syugo
NRID
1000050332961 1000050332961
researchmap permalink
read0077819 read0077819
Scopus Author ID
7005256762 7005256762
CreatorName
Ushio, Tomoo
CreatorName
Chandrasekar, V.
Description
Wang S., Wada Y., Hayashi S., et al. Electrical Alignment Signatures of Ice Particles Before Intracloud Lightning Activity Detected by Dual-Polarized Phased Array Weather Radar. Journal of Geophysical Research: Atmospheres 129, e2023JD039942 (2024); https://doi.org/10.1029/2023jd039942.
Abstract
The cloud electrification process has great significance in understanding the microphysical properties, electrical characteristics, and evolution of thunderstorms. This study employs an X-band dual-polarized multiparameter phased array weather radar (MP-PAWR) to observe the electrical alignment signatures of ice particles before the first intracloud (IC) lightning flash, and to explore the evolution of the upper charge region in the early electrification stage of an isolated thunderstorm. Negative KDP signatures associated with vertically oriented ice particles by strong electric fields in the upper parts of the thunderstorm are analyzed by introducing composite KDP, which is defined as a minimum KDP value observed in a vertical column across all elevation scans at each specific horizontal grid point at and above a designated layer. About 7 min before the first IC lightning flash, the mean canting angle of ice particles in the upper parts of the cloud changed from horizontal to vertical by strong electric fields, and the concentration of vertically aligned ice particles on the top of the cloud reached the maximum 30 s before the first IC lightning flash. These signatures exhibit an early electrification process in the upper parts of the thunderstorm. These results indicate that with the high spatial and temporal resolution, MP-PAWRs have the ability not only to detect the rapid evolution of microphysical structures but also to observe the early electrification of thunderstorms, which will facilitate forecasting IC lightning flash initiation combined with graupel presence signatures in the mixed-phase region in normal operation.
Publisher
John Wiley and Sons Inc
Source Title
Journal of Geophysical Research: Atmospheres
Volume (Issue)
129(7)
Page
e2023JD039942
Date of Issued
2024-04-16
Language
English
Handle URL
https://hdl.handle.net/11094/95796
PISSN
2169897X
eISSN
21698996
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1029/2023jd039942
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution 4.0 International License.
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Version of Record
Category
学術雑誌論文 Journal Article