Unusual nighttime impulsive foF2 enhancement below the southern anomaly crest under geomagnetically quiet conditions

Autores
Pezzopane, M.; Fagundes, P. R.; Ciraolo, L.; Correia, E.; Cabrera, Miguel Angel; Ezquer, Rodolfo Gerardo
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
An unusual nighttime impulsive electron density enhancement was observed on 6 March 2010 over a wide region of South America, below the southern crest of the equatorial anomaly, under low solar activity and quiet geomagnetic conditions. The phenomenon was observed almost simultaneously by the F2 layer critical frequency ( foF2) recorded at three ionospheric stations which are widely distributed in space, namely Cachoeira Paulista (22.4°S, 44.6°W, magnetic latitude 13.4°S), São José dos Campos (23.2°S, 45.9°W, magnetic latitude 14.1°S), Brazil, and Tucumán (26.9°S, 65.4°W, magnetic latitude 16.8°S), Argentina. Although in a more restricted region over Tucumán, the phenomenon was also observed by the total electron content (TEC) maps computed by usingmeasurements from 12 GPS receivers. The investigated phenomenon is very particular because besides being of brief duration, it is characterized by a pronounced compression of the ionosphere. This compression was clearly visible both by the virtual height of the base of the F region (h′F) recorded at the aforementioned ionospheric stations, and by both the vertical electron density profiles and the slab thickness computed over Tucumán. Consequently, neither an enhanced fountain effect nor plasma diffusion from the plasmasphere can be considered as the single cause of this unusual event. A thorough analysis of isoheight and isofrequency ionosonde plots suggest that traveling ionospheric disturbances (TIDs) caused by gravity wave (GW) propagation could have likely played a significant role in causing the phenomenon
Fil: Pezzopane, M.. Istituto Nazionale di Geofisica e Vulcanologia; Italia
Fil: Fagundes, P. R.. Física E Astronomia, Universidade Do Vale Do Paraiba; Brasil
Fil: Ciraolo, L.. Ifac-crn; Italia
Fil: Correia, E.. Física E Astronomia, Universidade Do Vale Do Paraiba; Brasil
Fil: Cabrera, Miguel Angel. Laboratorio de Telecomunicaciones; Argentina
Fil: Ezquer, Rodolfo Gerardo. Centro de Investigación de Atmósfera Superior y Radiopr; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
Materia
Equatorial Ionosphere
Instrument And Techniques
Ionosphere-Atmosphere Interactions
Traveling Ionospheric Disturbance
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/77534
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/77534
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Unusual nighttime impulsive foF2 enhancement below the southern anomaly crest under geomagnetically quiet conditionsPezzopane, M.Fagundes, P. R.Ciraolo, L.Correia, E.Cabrera, Miguel AngelEzquer, Rodolfo GerardoEquatorial IonosphereInstrument And TechniquesIonosphere-Atmosphere InteractionsTraveling Ionospheric Disturbancehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1An unusual nighttime impulsive electron density enhancement was observed on 6 March 2010 over a wide region of South America, below the southern crest of the equatorial anomaly, under low solar activity and quiet geomagnetic conditions. The phenomenon was observed almost simultaneously by the F2 layer critical frequency ( foF2) recorded at three ionospheric stations which are widely distributed in space, namely Cachoeira Paulista (22.4°S, 44.6°W, magnetic latitude 13.4°S), São José dos Campos (23.2°S, 45.9°W, magnetic latitude 14.1°S), Brazil, and Tucumán (26.9°S, 65.4°W, magnetic latitude 16.8°S), Argentina. Although in a more restricted region over Tucumán, the phenomenon was also observed by the total electron content (TEC) maps computed by usingmeasurements from 12 GPS receivers. The investigated phenomenon is very particular because besides being of brief duration, it is characterized by a pronounced compression of the ionosphere. This compression was clearly visible both by the virtual height of the base of the F region (h′F) recorded at the aforementioned ionospheric stations, and by both the vertical electron density profiles and the slab thickness computed over Tucumán. Consequently, neither an enhanced fountain effect nor plasma diffusion from the plasmasphere can be considered as the single cause of this unusual event. A thorough analysis of isoheight and isofrequency ionosonde plots suggest that traveling ionospheric disturbances (TIDs) caused by gravity wave (GW) propagation could have likely played a significant role in causing the phenomenonFil: Pezzopane, M.. Istituto Nazionale di Geofisica e Vulcanologia; ItaliaFil: Fagundes, P. R.. Física E Astronomia, Universidade Do Vale Do Paraiba; BrasilFil: Ciraolo, L.. Ifac-crn; ItaliaFil: Correia, E.. Física E Astronomia, Universidade Do Vale Do Paraiba; BrasilFil: Cabrera, Miguel Angel. Laboratorio de Telecomunicaciones; ArgentinaFil: Ezquer, Rodolfo Gerardo. Centro de Investigación de Atmósfera Superior y Radiopr; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaAmerican Geophysical Union2011-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/77534Pezzopane, M.; Fagundes, P. R.; Ciraolo, L.; Correia, E.; Cabrera, Miguel Angel; et al.; Unusual nighttime impulsive foF2 enhancement below the southern anomaly crest under geomagnetically quiet conditions; American Geophysical Union; Journal of Geophysical Research; 116; 12-2011; 1-10148-0227CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1029/2011JA016593info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2011JA016593info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:01:28Zoai:ri.conicet.gov.ar:11336/77534instacron: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:34982025-09-10 13:01:28.589CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Unusual nighttime impulsive foF2 enhancement below the southern anomaly crest under geomagnetically quiet conditions
title Unusual nighttime impulsive foF2 enhancement below the southern anomaly crest under geomagnetically quiet conditions
spellingShingle Unusual nighttime impulsive foF2 enhancement below the southern anomaly crest under geomagnetically quiet conditions
Pezzopane, M.
Equatorial Ionosphere
Instrument And Techniques
Ionosphere-Atmosphere Interactions
Traveling Ionospheric Disturbance
title_short Unusual nighttime impulsive foF2 enhancement below the southern anomaly crest under geomagnetically quiet conditions
title_full Unusual nighttime impulsive foF2 enhancement below the southern anomaly crest under geomagnetically quiet conditions
title_fullStr Unusual nighttime impulsive foF2 enhancement below the southern anomaly crest under geomagnetically quiet conditions
title_full_unstemmed Unusual nighttime impulsive foF2 enhancement below the southern anomaly crest under geomagnetically quiet conditions
title_sort Unusual nighttime impulsive foF2 enhancement below the southern anomaly crest under geomagnetically quiet conditions
dc.creator.none.fl_str_mv Pezzopane, M.
Fagundes, P. R.
Ciraolo, L.
Correia, E.
Cabrera, Miguel Angel
Ezquer, Rodolfo Gerardo
author Pezzopane, M.
author_facet Pezzopane, M.
Fagundes, P. R.
Ciraolo, L.
Correia, E.
Cabrera, Miguel Angel
Ezquer, Rodolfo Gerardo
author_role author
author2 Fagundes, P. R.
Ciraolo, L.
Correia, E.
Cabrera, Miguel Angel
Ezquer, Rodolfo Gerardo
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Equatorial Ionosphere
Instrument And Techniques
Ionosphere-Atmosphere Interactions
Traveling Ionospheric Disturbance
topic Equatorial Ionosphere
Instrument And Techniques
Ionosphere-Atmosphere Interactions
Traveling Ionospheric Disturbance
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv An unusual nighttime impulsive electron density enhancement was observed on 6 March 2010 over a wide region of South America, below the southern crest of the equatorial anomaly, under low solar activity and quiet geomagnetic conditions. The phenomenon was observed almost simultaneously by the F2 layer critical frequency ( foF2) recorded at three ionospheric stations which are widely distributed in space, namely Cachoeira Paulista (22.4°S, 44.6°W, magnetic latitude 13.4°S), São José dos Campos (23.2°S, 45.9°W, magnetic latitude 14.1°S), Brazil, and Tucumán (26.9°S, 65.4°W, magnetic latitude 16.8°S), Argentina. Although in a more restricted region over Tucumán, the phenomenon was also observed by the total electron content (TEC) maps computed by usingmeasurements from 12 GPS receivers. The investigated phenomenon is very particular because besides being of brief duration, it is characterized by a pronounced compression of the ionosphere. This compression was clearly visible both by the virtual height of the base of the F region (h′F) recorded at the aforementioned ionospheric stations, and by both the vertical electron density profiles and the slab thickness computed over Tucumán. Consequently, neither an enhanced fountain effect nor plasma diffusion from the plasmasphere can be considered as the single cause of this unusual event. A thorough analysis of isoheight and isofrequency ionosonde plots suggest that traveling ionospheric disturbances (TIDs) caused by gravity wave (GW) propagation could have likely played a significant role in causing the phenomenon
Fil: Pezzopane, M.. Istituto Nazionale di Geofisica e Vulcanologia; Italia
Fil: Fagundes, P. R.. Física E Astronomia, Universidade Do Vale Do Paraiba; Brasil
Fil: Ciraolo, L.. Ifac-crn; Italia
Fil: Correia, E.. Física E Astronomia, Universidade Do Vale Do Paraiba; Brasil
Fil: Cabrera, Miguel Angel. Laboratorio de Telecomunicaciones; Argentina
Fil: Ezquer, Rodolfo Gerardo. Centro de Investigación de Atmósfera Superior y Radiopr; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
description An unusual nighttime impulsive electron density enhancement was observed on 6 March 2010 over a wide region of South America, below the southern crest of the equatorial anomaly, under low solar activity and quiet geomagnetic conditions. The phenomenon was observed almost simultaneously by the F2 layer critical frequency ( foF2) recorded at three ionospheric stations which are widely distributed in space, namely Cachoeira Paulista (22.4°S, 44.6°W, magnetic latitude 13.4°S), São José dos Campos (23.2°S, 45.9°W, magnetic latitude 14.1°S), Brazil, and Tucumán (26.9°S, 65.4°W, magnetic latitude 16.8°S), Argentina. Although in a more restricted region over Tucumán, the phenomenon was also observed by the total electron content (TEC) maps computed by usingmeasurements from 12 GPS receivers. The investigated phenomenon is very particular because besides being of brief duration, it is characterized by a pronounced compression of the ionosphere. This compression was clearly visible both by the virtual height of the base of the F region (h′F) recorded at the aforementioned ionospheric stations, and by both the vertical electron density profiles and the slab thickness computed over Tucumán. Consequently, neither an enhanced fountain effect nor plasma diffusion from the plasmasphere can be considered as the single cause of this unusual event. A thorough analysis of isoheight and isofrequency ionosonde plots suggest that traveling ionospheric disturbances (TIDs) caused by gravity wave (GW) propagation could have likely played a significant role in causing the phenomenon
publishDate 2011
dc.date.none.fl_str_mv 2011-12
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/11336/77534
Pezzopane, M.; Fagundes, P. R.; Ciraolo, L.; Correia, E.; Cabrera, Miguel Angel; et al.; Unusual nighttime impulsive foF2 enhancement below the southern anomaly crest under geomagnetically quiet conditions; American Geophysical Union; Journal of Geophysical Research; 116; 12-2011; 1-1
0148-0227
CONICET Digital
CONICET
url http://hdl.handle.net/11336/77534
identifier_str_mv Pezzopane, M.; Fagundes, P. R.; Ciraolo, L.; Correia, E.; Cabrera, Miguel Angel; et al.; Unusual nighttime impulsive foF2 enhancement below the southern anomaly crest under geomagnetically quiet conditions; American Geophysical Union; Journal of Geophysical Research; 116; 12-2011; 1-1
0148-0227
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1029/2011JA016593
info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2011JA016593
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
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
_version_ 1842979951194669056
score 12.993085

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