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Observation of tropical positive cloud-to-ground flashes accompanied by chaotic and regular pulse trains

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dc.citedby0
dc.contributor.authorMohammad Sabri M.H.en_US
dc.contributor.authorAhmad M.R.en_US
dc.contributor.authorTakayanagi Y.en_US
dc.contributor.authorEdris M.Z.B.en_US
dc.contributor.authorShamsul Baharin S.A.en_US
dc.contributor.authorMorimoto T.en_US
dc.contributor.authorKawasaki Z.-I.en_US
dc.contributor.authorBaharuddin M.Z.en_US
dc.contributor.authorCooray V.en_US
dc.contributor.authorid57200560218en_US
dc.contributor.authorid58861819300en_US
dc.contributor.authorid54413056000en_US
dc.contributor.authorid57189588015en_US
dc.contributor.authorid57206727343en_US
dc.contributor.authorid55359062800en_US
dc.contributor.authorid36916954400en_US
dc.contributor.authorid35329255600en_US
dc.contributor.authorid7005428121en_US
dc.date.accessioned2025-03-03T07:42:32Z
dc.date.available2025-03-03T07:42:32Z
dc.date.issued2024
dc.description.abstractThis study investigates the occurrence of chaotic pulse trains (CPTs) and regular pulse trains (RPTs) in tropical positive cloud-to-ground (CG) lightning flashes. These flashes are categorized into four types based on the initial polarity of the initial breakdown (IB) pulses and their relationship to the first return stroke (RS). A total of 71 positive CG flashes from five thunderstorm events were analyzed. The analysis reveals instances of CPTs and RPTs both before and after the first positive RS, along with the occurrence of mixed polarities in RPTs. Variations in IB pulse polarities and the presence of CPTs and RPTs before the first positive RS were observed, contrasting with previous findings in negative CG flashes. All positive CG flashes have been detected when cloud top height occurrences were between 12 and 18 km. In contrast, for negative CG flashes with CPTs and RPTs the cloud top height occurrences were between 5 and 12 km. It is interesting that CPTs and RPTs can be detected during IB process of positive CG flashes at relatively high altitude in the thundercloud. Perhaps due to low pressure at higher altitudes in the cloud, electrical process associated with CPTs and RPTs are easily discharged before the occurrence first positive return stroke. The altitudes of cloud top heights for the inverse polarity of IB pulses were located between 16 and 18 km. This research enhances the understanding of positive CG lightning initiation process and their relationship with CPTs and RPTs, as well as the occurrence of recoil leaders. ? 2024 Elsevier Ltden_US
dc.description.natureFinalen_US
dc.identifier.ArtNo106285
dc.identifier.doi10.1016/j.jastp.2024.106285
dc.identifier.scopus2-s2.0-85197039371
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85197039371&doi=10.1016%2fj.jastp.2024.106285&partnerID=40&md5=d63b52aaf7cedf5eae5c940faa6ff605
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/36461
dc.identifier.volume261
dc.publisherElsevier Ltden_US
dc.sourceScopus
dc.sourcetitleJournal of Atmospheric and Solar-Terrestrial Physics
dc.subjectClouds
dc.subjectLightning protection
dc.subjectTropics
dc.subjectChaotic pulse
dc.subjectChaotic pulse train
dc.subjectInitial breakdown pulse
dc.subjectPositive cloud-to-ground flashes
dc.subjectPulse train
dc.subjectRecoil leader
dc.subjectRegular pulse train
dc.subjectReturn stroke
dc.subjectTropical thunderstorm
dc.subjectThunderstorms
dc.titleObservation of tropical positive cloud-to-ground flashes accompanied by chaotic and regular pulse trainsen_US
dc.typeArticleen_US
dspace.entity.typePublication
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