Triangulation of red sprites observed above a mesoscale convective system in North China

(整期优先)网络出版时间:2019-02-12
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Thetriangulationofredspriteswasobtained,basedonconcurrentobservationsoveramesoscaleconvectivesystem(MCS)inNorthChinafromtwostationsseparatedbyabout450km.Inaddition,broadbandsfericsfromthesprite-producinglightningweremeasuredatfivegroundstations,makingitpossibletolocateandidentifytheinpidualcausativelightningdischargesfordifferentelementsinthisdancingspriteevent.TheresultsofouranalysesindicatethatthespriteswereproducedabovethetrailingstratiformregionoftheMCS,andtheirparentstrokeswerelocatedmainlyintheperipheralareaofthestratiform.Thelateraloffsetbetweenspritesandcausativestrokesrangesfromafewkmtomorethan50km.Inaparticularlybrightsprite,withadistincthalofeatureandstreamersdescendingdowntoanaltitudeofapproximately48km,thespritecurrentsignalidentifiedintheelectricsferic,measuredatarangeofabout1,110km,peakedatapproximately1msafterthereturnstroke.