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Locating Thunder Source Using a Large-Aperture Micro-Barometer Array
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SYSNO ASEP 0541190 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Locating Thunder Source Using a Large-Aperture Micro-Barometer Array Author(s) Rusz, Jan (UFA-U) ORCID, RID
Chum, Jaroslav (UFA-U) RID, ORCID
Baše, Jiří (UFA-U) RID, ORCIDNumber of authors 3 Article number 614820 Source Title Frontiers in Earth Science. - : Frontiers Media
Roč. 9, March (2021)Number of pages 10 s. Language eng - English Country CH - Switzerland Keywords infrasound ; lightning ; thunder ; acoustic ; spherical ; waves Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects GA18-01969S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UFA-U - RVO:68378289 UT WOS 000635162500001 EID SCOPUS 85103521667 DOI 10.3389/feart.2021.614820 Annotation Lightning generates sound waves across a wide range of frequencies, including infrasonic waves below 20 Hz. Source mechanism for these low frequency pulses is still area for debate. Infrasound pulses detected after rapid changes of electrostatic field during the thunderstorm activity were analyzed. The measurements were done by large aperture array of absolute microbarometers located in the Western part of the Czech Republic. Distances between four measuring sites are in the range of 4–10 km. The infrasound source position was calculated from time delays between the rapid change of electrostatic field and infrasound signal arrival to the individual microbarometers assuming propagation of spherical waves from the source. Only cases with a sufficient signal-to-noise ratio on all four microbarometers were analyzed. The variation of sound speed with height due to temperature height profile was taken into account. For most of the analyzed cases, the calculated infrasound source position corresponds to the lightning location determined by European lightning detection network (EUCLID). The calculated height of infrasound source is most often 3–5 km. 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://www.frontiersin.org/articles/10.3389/feart.2021.614820/full
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