On the Genesis of Postmidnight Equatorial Spread F: Results for the American/Peruvian Sector

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dc.contributor.authorZhan, Weijia
dc.contributor.authorRodrigues, Fabiano S.
dc.contributor.authorMilla, Marco
dc.date.accessioned2018-12-11T10:35:20Z
dc.date.available2018-12-11T10:35:20Z
dc.date.issued2018-07-16
dc.description.abstractPrevious studies of the Earth's low‐latitude ionosphere using in situ measurements made by sensors on the Communication/Navigation Outage Forecasting System (C/NOFS) satellite showed an unexpected predominance of equatorial spread F (ESF) events in the postmidnight sector during June and December solstice months of the 2008–2009 deep solar minimum. It has been suggested that these events might have been driven by the unusual behavior of the equatorial plasma drifts, which showed an abnormal upward peak around midnight during the same period. We use coherent backscatter radar (Jicamarca Unattended Long‐term Investigations of the Ionosphere and Atmosphere ‐ JULIA) measurements made at the Jicamarca Radio Observatory (11.95°S, 76.87°W, ∼1∘ dip lat) in Peru to better understand the origin of the ESF irregularities observed by C/NOFS. The radar observations show that ESF events during December solstice start in the post sunset sector. These ESF events and the conditions for their development are shown to continue through midnight hours. The predominance of postmidnight irregularities on C/NOFS observations during December solstice is caused by the slow vertical development of the ESF structures, which only reach the topside near midnight in most cases. On June solstice, however, JULIA observations show that ESF started predominately in the midnight to postmidnight sector. Collocated digisonde observations provide additional insight on F‐region conditions leading to these ESF events.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationZhan, W., Rodrigues, F. S. & Milla, M. A. (2018). On the genesis of postmidnight equatorial spread F: Results for the American/Peruvian sector.==$Geophysical Research Letters, 45$==(15), 7354-7361. https://doi.org/10.1029/2018GL078822es_ES
dc.identifier.doihttps://doi.org/10.1029/2018GL078822es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalGeophysical Research Letterses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/3890
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:0094-8276
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_ES
dc.subjectPostmidnight ESFes_ES
dc.subjectClimatological featureses_ES
dc.subjectExtended solar minimumes_ES
dc.subjectAbnormal upward driftses_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleOn the Genesis of Postmidnight Equatorial Spread F: Results for the American/Peruvian Sectores_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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