Unusual nighttime impulsive foF2 enhancements at low latitudes: Phenomenology and possible explanations

Autores
Perna, L.; Pezzopane, M.; Zuccheretti, E.; Fagundes, P. R.; Jesus, R. de; Cabrera, Miguel Angel; Ezquer, Rodolfo Gerardo
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This paper is focused on unusual nighttime impulsive electron density enhancements that are rarely observed at low latitudes on a wide region of South America, under quiet and medium/high geomagnetic conditions. The phenomenon under investigation is very peculiar because besides being of brief duration, it is characterized by a pronounced compression of the ionosphere. The phenomenon was studied and analyzed using both the F2 layer critical frequency (foF2) and the virtual height of the base of the F region (h′F) values recorded at five ionospheric stations widely distributed in space, namely: Jicamarca (−12.0°, −76.8°, magnetic latitude −2.0°), Peru; Sao Luis (−2.6°, −44.2°, magnetic latitude +6.2°), Cachoeira Paulista (−22.4°, −44.6°, magnetic latitude −13.4°), and São José dos Campos (−23.2°, −45.9°, magnetic latitude −14.1°), Brazil; Tucumán (−26.9°, −65.4°, magnetic latitude −16.8°), Argentina. In a more restricted region over Tucumán, the phenomenon was also investigated by the total electron content (TEC) maps computed by using measurements from 12 GPS receivers. A detailed analysis of isoheight ionosonde plots suggests that traveling ionospheric disturbances (TIDs) caused by gravity wave (GW) propagation could play a significant role in causing the phenomenon both for quiet and for medium/high geomagnetic activity; in the latter case however a recharging of the fountain effect, due to electric fields penetrating from the magnetosphere, joins the TID propagation and plays an as much significant role in causing impulsive electron density enhancements.
Fil: Perna, L.. Instituto de Investigaciones Universitarias Roma la Sapienza; Italia
Fil: Pezzopane, M.. Istituto Nazionale Di Geofisica E Vulcanologia; Italia
Fil: Zuccheretti, E.. Istituto Nazionale Di Geofisica E Vulcanologia; Italia
Fil: Fagundes, P. R.. Universidade do Vale do Paraíba; Brasil
Fil: Jesus, R. de. Universidade do Vale do Paraíba; Brasil
Fil: Cabrera, Miguel Angel. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física. Laboratorio de Ionosfera; Argentina. Universidad Tecnológica Nacional. Facultad Regional Tucuman; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Electricidad, Electrónica y Computación. Laboratorio de Telecomunicaciones; Argentina
Fil: Ezquer, Rodolfo Gerardo. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física. Laboratorio de Ionosfera; Argentina. Universidad Tecnológica Nacional. Facultad Regional Tucuman; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Equatorial Ionosphere;
Electron Density Enhancement
Traveling Ionospheric Disturbance
Fountain Effect
Tec
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/30315
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/30315
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Unusual nighttime impulsive foF2 enhancements at low latitudes: Phenomenology and possible explanationsPerna, L.Pezzopane, M.Zuccheretti, E.Fagundes, P. R.Jesus, R. deCabrera, Miguel AngelEzquer, Rodolfo GerardoEquatorial Ionosphere;Electron Density EnhancementTraveling Ionospheric DisturbanceFountain EffectTechttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1This paper is focused on unusual nighttime impulsive electron density enhancements that are rarely observed at low latitudes on a wide region of South America, under quiet and medium/high geomagnetic conditions. The phenomenon under investigation is very peculiar because besides being of brief duration, it is characterized by a pronounced compression of the ionosphere. The phenomenon was studied and analyzed using both the F2 layer critical frequency (foF2) and the virtual height of the base of the F region (h′F) values recorded at five ionospheric stations widely distributed in space, namely: Jicamarca (−12.0°, −76.8°, magnetic latitude −2.0°), Peru; Sao Luis (−2.6°, −44.2°, magnetic latitude +6.2°), Cachoeira Paulista (−22.4°, −44.6°, magnetic latitude −13.4°), and São José dos Campos (−23.2°, −45.9°, magnetic latitude −14.1°), Brazil; Tucumán (−26.9°, −65.4°, magnetic latitude −16.8°), Argentina. In a more restricted region over Tucumán, the phenomenon was also investigated by the total electron content (TEC) maps computed by using measurements from 12 GPS receivers. A detailed analysis of isoheight ionosonde plots suggests that traveling ionospheric disturbances (TIDs) caused by gravity wave (GW) propagation could play a significant role in causing the phenomenon both for quiet and for medium/high geomagnetic activity; in the latter case however a recharging of the fountain effect, due to electric fields penetrating from the magnetosphere, joins the TID propagation and plays an as much significant role in causing impulsive electron density enhancements.Fil: Perna, L.. Instituto de Investigaciones Universitarias Roma la Sapienza; ItaliaFil: Pezzopane, M.. Istituto Nazionale Di Geofisica E Vulcanologia; ItaliaFil: Zuccheretti, E.. Istituto Nazionale Di Geofisica E Vulcanologia; ItaliaFil: Fagundes, P. R.. Universidade do Vale do Paraíba; BrasilFil: Jesus, R. de. Universidade do Vale do Paraíba; BrasilFil: Cabrera, Miguel Angel. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física. Laboratorio de Ionosfera; Argentina. Universidad Tecnológica Nacional. Facultad Regional Tucuman; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Electricidad, Electrónica y Computación. Laboratorio de Telecomunicaciones; ArgentinaFil: Ezquer, Rodolfo Gerardo. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física. Laboratorio de Ionosfera; Argentina. Universidad Tecnológica Nacional. Facultad Regional Tucuman; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaElsevier2013-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/30315Perna, L.; Pezzopane, M.; Zuccheretti, E.; Fagundes, P. R.; Jesus, R. de; et al.; Unusual nighttime impulsive foF2 enhancements at low latitudes: Phenomenology and possible explanations; Elsevier; Advances in Space Research; 54; 3; 5-2013; 369-3690273-1177CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.asr.2013.05.014info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0273117713002871info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:22:52Zoai:ri.conicet.gov.ar:11336/30315instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:22:52.867CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Unusual nighttime impulsive foF2 enhancements at low latitudes: Phenomenology and possible explanations
title Unusual nighttime impulsive foF2 enhancements at low latitudes: Phenomenology and possible explanations
spellingShingle Unusual nighttime impulsive foF2 enhancements at low latitudes: Phenomenology and possible explanations
Perna, L.
Equatorial Ionosphere;
Electron Density Enhancement
Traveling Ionospheric Disturbance
Fountain Effect
Tec
title_short Unusual nighttime impulsive foF2 enhancements at low latitudes: Phenomenology and possible explanations
title_full Unusual nighttime impulsive foF2 enhancements at low latitudes: Phenomenology and possible explanations
title_fullStr Unusual nighttime impulsive foF2 enhancements at low latitudes: Phenomenology and possible explanations
title_full_unstemmed Unusual nighttime impulsive foF2 enhancements at low latitudes: Phenomenology and possible explanations
title_sort Unusual nighttime impulsive foF2 enhancements at low latitudes: Phenomenology and possible explanations
dc.creator.none.fl_str_mv Perna, L.
Pezzopane, M.
Zuccheretti, E.
Fagundes, P. R.
Jesus, R. de
Cabrera, Miguel Angel
Ezquer, Rodolfo Gerardo
author Perna, L.
author_facet Perna, L.
Pezzopane, M.
Zuccheretti, E.
Fagundes, P. R.
Jesus, R. de
Cabrera, Miguel Angel
Ezquer, Rodolfo Gerardo
author_role author
author2 Pezzopane, M.
Zuccheretti, E.
Fagundes, P. R.
Jesus, R. de
Cabrera, Miguel Angel
Ezquer, Rodolfo Gerardo
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Equatorial Ionosphere;
Electron Density Enhancement
Traveling Ionospheric Disturbance
Fountain Effect
Tec
topic Equatorial Ionosphere;
Electron Density Enhancement
Traveling Ionospheric Disturbance
Fountain Effect
Tec
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv This paper is focused on unusual nighttime impulsive electron density enhancements that are rarely observed at low latitudes on a wide region of South America, under quiet and medium/high geomagnetic conditions. The phenomenon under investigation is very peculiar because besides being of brief duration, it is characterized by a pronounced compression of the ionosphere. The phenomenon was studied and analyzed using both the F2 layer critical frequency (foF2) and the virtual height of the base of the F region (h′F) values recorded at five ionospheric stations widely distributed in space, namely: Jicamarca (−12.0°, −76.8°, magnetic latitude −2.0°), Peru; Sao Luis (−2.6°, −44.2°, magnetic latitude +6.2°), Cachoeira Paulista (−22.4°, −44.6°, magnetic latitude −13.4°), and São José dos Campos (−23.2°, −45.9°, magnetic latitude −14.1°), Brazil; Tucumán (−26.9°, −65.4°, magnetic latitude −16.8°), Argentina. In a more restricted region over Tucumán, the phenomenon was also investigated by the total electron content (TEC) maps computed by using measurements from 12 GPS receivers. A detailed analysis of isoheight ionosonde plots suggests that traveling ionospheric disturbances (TIDs) caused by gravity wave (GW) propagation could play a significant role in causing the phenomenon both for quiet and for medium/high geomagnetic activity; in the latter case however a recharging of the fountain effect, due to electric fields penetrating from the magnetosphere, joins the TID propagation and plays an as much significant role in causing impulsive electron density enhancements.
Fil: Perna, L.. Instituto de Investigaciones Universitarias Roma la Sapienza; Italia
Fil: Pezzopane, M.. Istituto Nazionale Di Geofisica E Vulcanologia; Italia
Fil: Zuccheretti, E.. Istituto Nazionale Di Geofisica E Vulcanologia; Italia
Fil: Fagundes, P. R.. Universidade do Vale do Paraíba; Brasil
Fil: Jesus, R. de. Universidade do Vale do Paraíba; Brasil
Fil: Cabrera, Miguel Angel. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física. Laboratorio de Ionosfera; Argentina. Universidad Tecnológica Nacional. Facultad Regional Tucuman; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Electricidad, Electrónica y Computación. Laboratorio de Telecomunicaciones; Argentina
Fil: Ezquer, Rodolfo Gerardo. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física. Laboratorio de Ionosfera; Argentina. Universidad Tecnológica Nacional. Facultad Regional Tucuman; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description This paper is focused on unusual nighttime impulsive electron density enhancements that are rarely observed at low latitudes on a wide region of South America, under quiet and medium/high geomagnetic conditions. The phenomenon under investigation is very peculiar because besides being of brief duration, it is characterized by a pronounced compression of the ionosphere. The phenomenon was studied and analyzed using both the F2 layer critical frequency (foF2) and the virtual height of the base of the F region (h′F) values recorded at five ionospheric stations widely distributed in space, namely: Jicamarca (−12.0°, −76.8°, magnetic latitude −2.0°), Peru; Sao Luis (−2.6°, −44.2°, magnetic latitude +6.2°), Cachoeira Paulista (−22.4°, −44.6°, magnetic latitude −13.4°), and São José dos Campos (−23.2°, −45.9°, magnetic latitude −14.1°), Brazil; Tucumán (−26.9°, −65.4°, magnetic latitude −16.8°), Argentina. In a more restricted region over Tucumán, the phenomenon was also investigated by the total electron content (TEC) maps computed by using measurements from 12 GPS receivers. A detailed analysis of isoheight ionosonde plots suggests that traveling ionospheric disturbances (TIDs) caused by gravity wave (GW) propagation could play a significant role in causing the phenomenon both for quiet and for medium/high geomagnetic activity; in the latter case however a recharging of the fountain effect, due to electric fields penetrating from the magnetosphere, joins the TID propagation and plays an as much significant role in causing impulsive electron density enhancements.
publishDate 2013
dc.date.none.fl_str_mv 2013-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/30315
Perna, L.; Pezzopane, M.; Zuccheretti, E.; Fagundes, P. R.; Jesus, R. de; et al.; Unusual nighttime impulsive foF2 enhancements at low latitudes: Phenomenology and possible explanations; Elsevier; Advances in Space Research; 54; 3; 5-2013; 369-369
0273-1177
CONICET Digital
CONICET
url http://hdl.handle.net/11336/30315
identifier_str_mv Perna, L.; Pezzopane, M.; Zuccheretti, E.; Fagundes, P. R.; Jesus, R. de; et al.; Unusual nighttime impulsive foF2 enhancements at low latitudes: Phenomenology and possible explanations; Elsevier; Advances in Space Research; 54; 3; 5-2013; 369-369
0273-1177
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.asr.2013.05.014
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0273117713002871
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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