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Lightning mapping observation of a terrestrial gamma-ray flash

dc.contributor.author Lu, G
dc.contributor.author Blakeslee, RJ
dc.contributor.author Li, J
dc.contributor.author Smith, DM
dc.contributor.author Shao, XM
dc.contributor.author McCaul, EW
dc.contributor.author Buechler, DE
dc.contributor.author Christian, HJ
dc.contributor.author Hall, JM
dc.contributor.author Cummer, SA
dc.date.accessioned 2011-06-21T17:27:12Z
dc.date.issued 2010-06-01
dc.identifier.issn 0094-8276
dc.identifier.uri https://hdl.handle.net/10161/4116
dc.description.abstract We report the observation with the North Alabama Lightning Mapping Array (LMA) related to a terrestrial gamma-ray flash (TGF) detected by RHESSI on 26 July 2008. The LMA data explicitly show the TGF was produced during the initial development of a compact intracloud (IC) lightning flash between a negative charge region centered at about 8.5 km above sea level (-22C temperature level) a higher positive region centered at 13 km, both confined to the convective core of an isolated storm in close proximity to the RHESSI footprint. After the occurrence of an LMA source with a high peak power (26 kW), the initial lightning evolution caused an unusually large IC current moment that became detectable 2 ms after the first LMA source and increased for another 2 ms, during which the burst of gamma-rays was produced. This slowly building current moment was most likely associated with the upward leader progression, which produced an uncommonly large IC charge moment change (+90 Ckm) in 3 ms while being punctuated by a sequence of fast discharge. These observations suggest that the leader development may be involved in the TGF production. Copyright © 2010 by the American Geophysical Union.
dc.language.iso en_US
dc.publisher American Geophysical Union (AGU)
dc.relation.ispartof Geophysical Research Letters
dc.relation.isversionof 10.1029/2010GL043494
dc.title Lightning mapping observation of a terrestrial gamma-ray flash
dc.title.alternative
dc.type Journal article
duke.contributor.id Cummer, SA|0236221
dc.description.version Version of Record
duke.date.pubdate 2010-6-8
duke.description.issue
duke.description.volume 37
dc.relation.journal Geophysical Research Letters
pubs.begin-page L11806
pubs.issue 11
pubs.organisational-group Duke
pubs.organisational-group Electrical and Computer Engineering
pubs.organisational-group Pratt School of Engineering
pubs.publication-status Published
pubs.volume 37


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