Longitudinal Differences Observed in the Ionospheric F-Region During the Major Geomagnetic Storm of March 31, 2001

A new ionospheric sounding station using a Canadian Advanced Digital Ionosonde (CADI) was established for routine measurements by the “Universidade do Vale do Paraiba (UNIVAP)” at S˜ao Jos´e dos Campos (23.2_ S, 45.9_ W), Brazil, in August 2000. A major geomagnetic storm with gradual commencement at...

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Detalhes bibliográficos
Autores: Sahai, Y., Fagundes, P. R., Becher, P. F., Abalde, J. R., Crowley, G., Miró Amarante, Gloria
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2004
País:España
Recursos:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/49966
Acesso em linha:http://hdl.handle.net/11441/49966
https://doi.org/10.5194/angeo-22-3221-2004
Access Level:acceso abierto
Palavra-chave:Ionosphere
Ionospheric disturbances
Modelling and forecasting
Magnetospheric physics
Storms and substorms
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spelling Longitudinal Differences Observed in the Ionospheric F-Region During the Major Geomagnetic Storm of March 31, 2001Sahai, Y.Fagundes, P. R.Becher, P. F.Abalde, J. R.Crowley, G.Miró Amarante, GloriaIonosphereIonospheric disturbancesModelling and forecastingMagnetospheric physicsStorms and substormsA new ionospheric sounding station using a Canadian Advanced Digital Ionosonde (CADI) was established for routine measurements by the “Universidade do Vale do Paraiba (UNIVAP)” at S˜ao Jos´e dos Campos (23.2_ S, 45.9_ W), Brazil, in August 2000. A major geomagnetic storm with gradual commencement at about 01:00 UT was observed on 31 March 2001. In this paper, we present and discuss salient features from the ionospheric sounding measurements carried out at S. J. Campos on the three consecutive UT days 30 March (quiet), 31 March (disturbed) and 1 April (recovery) 2001. During most of the storm period, the foF2 values showed negative phase, whereas during the two storm-time peaks, large F-region height variations were observed. In order to study the longitudinal differences observed in the F-region during the storm, the simultaneous ionospheric sounding measurements carried out at S. J. Campos, El Arenosillo (37.1_ N, 6.7_W), Spain, Okinawa (26.3_ N, 127.8_ E), Japan and Wakkanai (45.5_ N, 141.7_ E), Japan, during the period 30 March–1 April 2001, have been analyzed. A comparison of the observed ionospheric parameters (h0F and foF2) in the two longitudinal zones (1. Japanese and 2. Brazilian-Spanish) shows both similarities and differences associated with the geomagnetic disturbances. Some latitudinal differences are also observed in the two longitudinal zones. In addition, global ionospheric TEC maps from the worldwide network of GPS receivers are presented, showing widespread TEC changes during both the main and recovery phases of the storm. The ionospheric sounding measurements are compared with the ASPEN-TIMEGCM model runs appropriate for the storm conditions. The model results produce better agreement during the quiet period. During the disturbed period, some of the observed F-region height variations are well reproduced by the model results. The model foF2 and TEC results differ considerably during the recovery period and indicate much stronger negative phase at all the stations, particularly at the low-latitude ones.European Geosciences UnionTecnología Electrónica2004info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttp://hdl.handle.net/11441/49966https://doi.org/10.5194/angeo-22-3221-2004reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésAnnales geophysicae (1988), 22 (9), 3221-3229.http://www.ann-geophys.net/22/3221/2004/angeo-22-3221-2004.pdfinfo:eu-repo/semantics/openAccessoai:idus.us.es:11441/499662026-06-17T12:51:07Z
dc.title.none.fl_str_mv Longitudinal Differences Observed in the Ionospheric F-Region During the Major Geomagnetic Storm of March 31, 2001
title Longitudinal Differences Observed in the Ionospheric F-Region During the Major Geomagnetic Storm of March 31, 2001
spellingShingle Longitudinal Differences Observed in the Ionospheric F-Region During the Major Geomagnetic Storm of March 31, 2001
Sahai, Y.
Ionosphere
Ionospheric disturbances
Modelling and forecasting
Magnetospheric physics
Storms and substorms
title_short Longitudinal Differences Observed in the Ionospheric F-Region During the Major Geomagnetic Storm of March 31, 2001
title_full Longitudinal Differences Observed in the Ionospheric F-Region During the Major Geomagnetic Storm of March 31, 2001
title_fullStr Longitudinal Differences Observed in the Ionospheric F-Region During the Major Geomagnetic Storm of March 31, 2001
title_full_unstemmed Longitudinal Differences Observed in the Ionospheric F-Region During the Major Geomagnetic Storm of March 31, 2001
title_sort Longitudinal Differences Observed in the Ionospheric F-Region During the Major Geomagnetic Storm of March 31, 2001
dc.creator.none.fl_str_mv Sahai, Y.
Fagundes, P. R.
Becher, P. F.
Abalde, J. R.
Crowley, G.
Miró Amarante, Gloria
author Sahai, Y.
author_facet Sahai, Y.
Fagundes, P. R.
Becher, P. F.
Abalde, J. R.
Crowley, G.
Miró Amarante, Gloria
author_role author
author2 Fagundes, P. R.
Becher, P. F.
Abalde, J. R.
Crowley, G.
Miró Amarante, Gloria
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Tecnología Electrónica
dc.subject.none.fl_str_mv Ionosphere
Ionospheric disturbances
Modelling and forecasting
Magnetospheric physics
Storms and substorms
topic Ionosphere
Ionospheric disturbances
Modelling and forecasting
Magnetospheric physics
Storms and substorms
description A new ionospheric sounding station using a Canadian Advanced Digital Ionosonde (CADI) was established for routine measurements by the “Universidade do Vale do Paraiba (UNIVAP)” at S˜ao Jos´e dos Campos (23.2_ S, 45.9_ W), Brazil, in August 2000. A major geomagnetic storm with gradual commencement at about 01:00 UT was observed on 31 March 2001. In this paper, we present and discuss salient features from the ionospheric sounding measurements carried out at S. J. Campos on the three consecutive UT days 30 March (quiet), 31 March (disturbed) and 1 April (recovery) 2001. During most of the storm period, the foF2 values showed negative phase, whereas during the two storm-time peaks, large F-region height variations were observed. In order to study the longitudinal differences observed in the F-region during the storm, the simultaneous ionospheric sounding measurements carried out at S. J. Campos, El Arenosillo (37.1_ N, 6.7_W), Spain, Okinawa (26.3_ N, 127.8_ E), Japan and Wakkanai (45.5_ N, 141.7_ E), Japan, during the period 30 March–1 April 2001, have been analyzed. A comparison of the observed ionospheric parameters (h0F and foF2) in the two longitudinal zones (1. Japanese and 2. Brazilian-Spanish) shows both similarities and differences associated with the geomagnetic disturbances. Some latitudinal differences are also observed in the two longitudinal zones. In addition, global ionospheric TEC maps from the worldwide network of GPS receivers are presented, showing widespread TEC changes during both the main and recovery phases of the storm. The ionospheric sounding measurements are compared with the ASPEN-TIMEGCM model runs appropriate for the storm conditions. The model results produce better agreement during the quiet period. During the disturbed period, some of the observed F-region height variations are well reproduced by the model results. The model foF2 and TEC results differ considerably during the recovery period and indicate much stronger negative phase at all the stations, particularly at the low-latitude ones.
publishDate 2004
dc.date.none.fl_str_mv 2004
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11441/49966
https://doi.org/10.5194/angeo-22-3221-2004
url http://hdl.handle.net/11441/49966
https://doi.org/10.5194/angeo-22-3221-2004
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Annales geophysicae (1988), 22 (9), 3221-3229.
http://www.ann-geophys.net/22/3221/2004/angeo-22-3221-2004.pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv European Geosciences Union
publisher.none.fl_str_mv European Geosciences Union
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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