The November 2004 superstorm: Comparison of low-latitude TEC observations with LLIONS model results

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dc.contributor.authorHei, Matthew A.
dc.contributor.authorValladares, Cesar E.
dc.date.accessioned2018-11-07T10:11:55Z
dc.date.available2018-11-07T10:11:55Z
dc.date.issued2009-04-07
dc.description.abstractWe investigate the effects of penetration electric fields, meridional thermospheric neutral winds, and composition perturbation zones (CPZs) on the distribution of low-latitude plasma during the 7–11 November 2004 geomagnetic superstorm. The impact on low-latitude plasma was assessed using total electron content (TEC) measurements from a latitudinally distributed array of ground-based GPS receivers in South America. Jicamarca Radio Observatory incoherent scatter radar measurements of vertical E×B drift are used in combination with the Low-Latitude IONospheric Sector (LLIONS) model to examine how penetration electric fields and meridional neutral winds shape low-latitude TEC. It is found that superfountain conditions pertain between ∼1900 and 2100 UT on 9 November, creating enhanced equatorial ionization anomaly (EIA) crests at ±20° geomagnetic latitude. Large-amplitude and/or long-duration changes in the electric field were found to produce significant changes in EIA plasma density and latitudinal location, with a delay time of ∼2–2.5 h. Superfountain drifts were primarily responsible for EIA TEC levels; meridional winds were needed only to create hemispherical crest TEC asymmetries. The [O/N2] density ratio (derived from the GUVI instrument, flown on the TIMED satellite) and measurements of total atmospheric density (from the GRACE satellites), combined with TEC measurements, yield information regarding a likely CPZ that appeared on 10 November, suppressing TEC for over 16 h.es_ES
dc.description.peer-reviewPor pareses_ES
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dc.identifier.citationHei, M. A., & Valladares, C. E. (2009). The November 2004 superstorm: Comparison of low-latitude TEC observations with LLIONS model results.==$Journal of Atmospheric and Solar-Terrestrial Physics, 72$==(4), 334-343. https://doi.org/10.1016/j.jastp.2009.03.025es_ES
dc.identifier.doihttps://doi.org/10.1016/j.jastp.2009.03.025es_ES
dc.identifier.journalJournal of Atmospheric and Solar-Terrestrial Physicses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/3364
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.relation.ispartofurn:issn:1364-6826
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_ES
dc.subjectEIAes_ES
dc.subjectCPZes_ES
dc.subjectSuperstormes_ES
dc.subjectSuperfountaines_ES
dc.subjectGPSes_ES
dc.subjectTECes_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleThe November 2004 superstorm: Comparison of low-latitude TEC observations with LLIONS model resultses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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