Disturbance zonal and vertical plasma drifts in the Peruvian sector during solar minimum phases

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dc.contributor.authorSantos, A. M.
dc.contributor.authorAbdu, M. A.
dc.contributor.authorSouza, J. R.
dc.contributor.authorSobral, J. H. A.
dc.contributor.authorBatista, I. S.
dc.date.accessioned2018-11-20T12:43:50Z
dc.date.available2018-11-20T12:43:50Z
dc.date.issued2016-02-11
dc.description.abstractIn the present work, we investigate the behavior of the equatorial F region zonal plasma drifts over the Peruvian region under magnetically disturbed conditions during two solar minimum epochs, one of them being the recent prolonged solar activity minimum. The study utilizes the vertical and zonal components of the plasma drifts measured by the Jicamarca (11.95°S; 76.87°W) incoherent scatter radar during two events that occurred on 10 April 1997 and 24 June 2008 and model calculation of the zonal drift in a realistic ionosphere simulated by the Sheffield University Plasmasphere‐Ionosphere Model‐INPE. Two main points are focused: (1) the connection between electric fields and plasma drifts under prompt penetration electric field during a disturbed periods and (2) anomalous behavior of daytime zonal drift in the absence of any magnetic storm. A perfect anticorrelation between vertical and zonal drifts was observed during the night and in the initial and growth phases of the magnetic storm. For the first time, based on a realistic low‐latitude ionosphere, we will show, on a detailed quantitative basis, that this anticorrelation is driven mainly by a vertical Hall electric field induced by the primary zonal electric field in the presence of an enhanced nighttime E region ionization. It is shown that an increase in the field line‐integrated Hall‐to‐Pedersen conductivity ratio urn:x-wiley:21699380:media:jgra52445:jgra52445-math-0001, which can arise from precipitation of energetic particles in the region of the South American Magnetic Anomaly, is capable of explaining the observed anticorrelation between the vertical and zonal plasma drifts. Evidence for the particle ionization is provided from the occurrence of anomalous sporadic E layers over the low‐latitude station, Cachoeira Paulista (22.67°S; 44.9°W)—Brazil. It will also be shown that the zonal plasma drift reversal to eastward in the afternoon two hours earlier than its reference quiet time pattern is possibly caused by weakening of the zonal wind system during the prolonged solar minimum period.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationSantos, A. M., Abdu, M. A., Souza, J. R., Sobral, J. H. A., & Batista, I. S. (2016). Disturbance zonal and vertical plasma drifts in the Peruvian sector during solar minimum phases.==$Journal of Geophysical Research: Space Physics, 121$==(3), 2503-2521. https://doi.org/10.1002/2015JA022146es_ES
dc.identifier.doihttps://doi.org/10.1002/2015JA022146es_ES
dc.identifier.journalJournal of Geophysical Research: Space Physicses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/3721
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.relation.ispartofurn:issn:2169-9380
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_ES
dc.subjectElectric fieldes_ES
dc.subjectIonospheric driftses_ES
dc.subjectMagnetic stormses_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleDisturbance zonal and vertical plasma drifts in the Peruvian sector during solar minimum phaseses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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