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Differences in Cloud Radar Phase and Power in Co- and Cross-Channel — Indicator of Lightning
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SYSNO ASEP 0538940 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Differences in Cloud Radar Phase and Power in Co- and Cross-Channel — Indicator of Lightning Author(s) Sokol, Zbyněk (UFA-U) RID, ORCID
Popová, Jana (UFA-U) RID, ORCIDNumber of authors 2 Article number 503 Source Title Remote Sensing. - : MDPI
Roč. 13, č. 3 (2021)Number of pages 21 s. Language eng - English Country CH - Switzerland Keywords cloud radar ; thunderstorm ; power spectrum ; phase ; discharge ; lightning ; predictability Subject RIV DG - Athmosphere Sciences, Meteorology OECD category Meteorology and atmospheric sciences Method of publishing Open access Institutional support UFA-U - RVO:68378289 UT WOS 000615471800001 EID SCOPUS 85100410775 DOI 10.3390/rs13030503 Annotation Thunderstorms and especially induced lightning discharges have still not been fully understood, although they are known to cause many casualties yearly worldwide. This study aims at filling the gap of knowledge by investigating the potential of phase and power of the co- and cross-channels of a vertical cloud radar to indicate lightning close to the radar site. We performed statistical and correlation analyses of vertical profiles of phase and power spectra in the co- and the cross-channel for 38 days of thunderstorms producing lightning up to 20 km from the radar in 2018–2019. Specifically, we divided the dataset into “near” and “far” data according to the observed distance of lightning to the radar and analyzed it separately. Although the results are quite initial given the limited number of “near” data, they clearly showed different structures of “near” and “far” data, thus confirming the potential of radar data to indicate lightning. Moreover, for the first time in this study the predictability of lightning using cloud radar quantities was evaluated. We applied a Regression Tree Model to diagnose lightning and verified it using Receiver Operating Characteristic (ROC) and Critical Success Index (CSI). ROC provided surprisingly good results, while CSI was not that good but considering the very rare nature of lightning its values are high as well. Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2022 Electronic address https://oadoi.org/10.3390/rs13030503
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