Equatorial and low latitude ionosphere during intense geomagnetic storms

Autores
Mansilla, Gustavo Adolfo
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
An investigation is made in order to analyze the role of neutral gas composition in the equatorial and low latitude ionosphere during intense geomagnetic storms. To this end data taken by the Dynamic Explorer 2 satellite at 280-300 km (molecular nitrogen N2 and atomic oxygen O concentrations, electron density and vertical plasma drifts) are used. The sudden commencements of the events considered occurred at 11:38 UT on March 1, 1982, 18:41 UT on November 20, 1982 and 16:14 UT on February 4, 1983. Vertical plasma drifts are the most important contributor to the initial storm time response of the equatorial F region. Neutral composition changes (expressed as an increase in the molecular species, mainly N2) possibly play a predominant role in the equatorial and low latitude (10 – 200) decreases of electron density at heights near F2-region maximum during the main and recovery phases of intense geomagnetic storms. Delayed increases of electron density observed at daytime during the recovery phase may be also attributed to increases in atomic oxygen. At low latitudes possibly a combined effect of O increase and upward plasma drift due to enhanced equatorward winds is the responsible mechanism for the maintenance of enhanced electron density values.
Fil: Mansilla, Gustavo Adolfo. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física. Laboratorio de Ionósfera; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
Materia
Geomagnetic storms
Ionospheric storms
Equatorial anomaly
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:11336/85474
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Equatorial and low latitude ionosphere during intense geomagnetic stormsMansilla, Gustavo AdolfoGeomagnetic stormsIonospheric stormsEquatorial anomalyhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1An investigation is made in order to analyze the role of neutral gas composition in the equatorial and low latitude ionosphere during intense geomagnetic storms. To this end data taken by the Dynamic Explorer 2 satellite at 280-300 km (molecular nitrogen N2 and atomic oxygen O concentrations, electron density and vertical plasma drifts) are used. The sudden commencements of the events considered occurred at 11:38 UT on March 1, 1982, 18:41 UT on November 20, 1982 and 16:14 UT on February 4, 1983. Vertical plasma drifts are the most important contributor to the initial storm time response of the equatorial F region. Neutral composition changes (expressed as an increase in the molecular species, mainly N2) possibly play a predominant role in the equatorial and low latitude (10 – 200) decreases of electron density at heights near F2-region maximum during the main and recovery phases of intense geomagnetic storms. Delayed increases of electron density observed at daytime during the recovery phase may be also attributed to increases in atomic oxygen. At low latitudes possibly a combined effect of O increase and upward plasma drift due to enhanced equatorward winds is the responsible mechanism for the maintenance of enhanced electron density values.Fil: Mansilla, Gustavo Adolfo. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física. Laboratorio de Ionósfera; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaElsevier2006-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/85474Mansilla, Gustavo Adolfo; Equatorial and low latitude ionosphere during intense geomagnetic storms; Elsevier; Journal of Atmospheric and Solar-Terrestrial Physics; 68; 18; 12-2006; 2091-21001364-6826CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jastp.2006.07.005info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1364682606001751/pdfft?md5=b6bad05be6a3ae00de53d2c642a09f49&pid=1-s2.0-S1364682606001751-main.pdfinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:45:54Zoai:ri.conicet.gov.ar:11336/85474instacron: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 10:45:54.896CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Equatorial and low latitude ionosphere during intense geomagnetic storms
title Equatorial and low latitude ionosphere during intense geomagnetic storms
spellingShingle Equatorial and low latitude ionosphere during intense geomagnetic storms
Mansilla, Gustavo Adolfo
Geomagnetic storms
Ionospheric storms
Equatorial anomaly
title_short Equatorial and low latitude ionosphere during intense geomagnetic storms
title_full Equatorial and low latitude ionosphere during intense geomagnetic storms
title_fullStr Equatorial and low latitude ionosphere during intense geomagnetic storms
title_full_unstemmed Equatorial and low latitude ionosphere during intense geomagnetic storms
title_sort Equatorial and low latitude ionosphere during intense geomagnetic storms
dc.creator.none.fl_str_mv Mansilla, Gustavo Adolfo
author Mansilla, Gustavo Adolfo
author_facet Mansilla, Gustavo Adolfo
author_role author
dc.subject.none.fl_str_mv Geomagnetic storms
Ionospheric storms
Equatorial anomaly
topic Geomagnetic storms
Ionospheric storms
Equatorial anomaly
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 investigation is made in order to analyze the role of neutral gas composition in the equatorial and low latitude ionosphere during intense geomagnetic storms. To this end data taken by the Dynamic Explorer 2 satellite at 280-300 km (molecular nitrogen N2 and atomic oxygen O concentrations, electron density and vertical plasma drifts) are used. The sudden commencements of the events considered occurred at 11:38 UT on March 1, 1982, 18:41 UT on November 20, 1982 and 16:14 UT on February 4, 1983. Vertical plasma drifts are the most important contributor to the initial storm time response of the equatorial F region. Neutral composition changes (expressed as an increase in the molecular species, mainly N2) possibly play a predominant role in the equatorial and low latitude (10 – 200) decreases of electron density at heights near F2-region maximum during the main and recovery phases of intense geomagnetic storms. Delayed increases of electron density observed at daytime during the recovery phase may be also attributed to increases in atomic oxygen. At low latitudes possibly a combined effect of O increase and upward plasma drift due to enhanced equatorward winds is the responsible mechanism for the maintenance of enhanced electron density values.
Fil: Mansilla, Gustavo Adolfo. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física. Laboratorio de Ionósfera; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
description An investigation is made in order to analyze the role of neutral gas composition in the equatorial and low latitude ionosphere during intense geomagnetic storms. To this end data taken by the Dynamic Explorer 2 satellite at 280-300 km (molecular nitrogen N2 and atomic oxygen O concentrations, electron density and vertical plasma drifts) are used. The sudden commencements of the events considered occurred at 11:38 UT on March 1, 1982, 18:41 UT on November 20, 1982 and 16:14 UT on February 4, 1983. Vertical plasma drifts are the most important contributor to the initial storm time response of the equatorial F region. Neutral composition changes (expressed as an increase in the molecular species, mainly N2) possibly play a predominant role in the equatorial and low latitude (10 – 200) decreases of electron density at heights near F2-region maximum during the main and recovery phases of intense geomagnetic storms. Delayed increases of electron density observed at daytime during the recovery phase may be also attributed to increases in atomic oxygen. At low latitudes possibly a combined effect of O increase and upward plasma drift due to enhanced equatorward winds is the responsible mechanism for the maintenance of enhanced electron density values.
publishDate 2006
dc.date.none.fl_str_mv 2006-12
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/11336/85474
Mansilla, Gustavo Adolfo; Equatorial and low latitude ionosphere during intense geomagnetic storms; Elsevier; Journal of Atmospheric and Solar-Terrestrial Physics; 68; 18; 12-2006; 2091-2100
1364-6826
CONICET Digital
CONICET
url http://hdl.handle.net/11336/85474
identifier_str_mv Mansilla, Gustavo Adolfo; Equatorial and low latitude ionosphere during intense geomagnetic storms; Elsevier; Journal of Atmospheric and Solar-Terrestrial Physics; 68; 18; 12-2006; 2091-2100
1364-6826
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.jastp.2006.07.005
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1364682606001751/pdfft?md5=b6bad05be6a3ae00de53d2c642a09f49&pid=1-s2.0-S1364682606001751-main.pdf
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 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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