Discrete wavelet analysis to assess long-term trends in geomagnetic activity

Autores
Zossi Artigas, Marta Maria; Elias, Ana Georgina; Fernandez, Patricia Mónica
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
To assess long-term trends in geomagnetic activity, the discrete wavelet transform using the Daubechies function was applied to aa and Dst for periods 1868–2003 and 1957–2003 respectively.Among a variety of techniques available for analysing trends, wavelet analysis has emerged in the last decade as a useful statistical tool for this purpose. The wavelet order and border conditions of the transform were selected minimizing the mean relative error. A sequence of alternating trends is obtained in the case of aa, with the greatest minima around 1880 and 1905 followed by 1965 and 2000. Maximum values occur around 1890, 1955 and 1990. Dst index shows the last two minima and the maximum around 1990. Long term trends in solar wind velocity, density and pressure, IMF magnitude B, southward component Bz, sunspot number Rz and the coronal index were also analysed in order to identify possible causes for the observed long-term variation in geomagnetic activity. They all qualitatively agree with aa and Dst behavior pointing out a solar origin.ior pointing out a solar origin.
Fil: Zossi Artigas, Marta Maria. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
Fil: Elias, Ana Georgina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; Argentina
Fil: Fernandez, Patricia Mónica. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; Argentina
Materia
Geomagnetic Activity
Wavelet Analysis
Long Term Trend
Solar Wind
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:11336/83989
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Discrete wavelet analysis to assess long-term trends in geomagnetic activityZossi Artigas, Marta MariaElias, Ana GeorginaFernandez, Patricia MónicaGeomagnetic ActivityWavelet AnalysisLong Term TrendSolar Windhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1To assess long-term trends in geomagnetic activity, the discrete wavelet transform using the Daubechies function was applied to aa and Dst for periods 1868–2003 and 1957–2003 respectively.Among a variety of techniques available for analysing trends, wavelet analysis has emerged in the last decade as a useful statistical tool for this purpose. The wavelet order and border conditions of the transform were selected minimizing the mean relative error. A sequence of alternating trends is obtained in the case of aa, with the greatest minima around 1880 and 1905 followed by 1965 and 2000. Maximum values occur around 1890, 1955 and 1990. Dst index shows the last two minima and the maximum around 1990. Long term trends in solar wind velocity, density and pressure, IMF magnitude B, southward component Bz, sunspot number Rz and the coronal index were also analysed in order to identify possible causes for the observed long-term variation in geomagnetic activity. They all qualitatively agree with aa and Dst behavior pointing out a solar origin.ior pointing out a solar origin.Fil: Zossi Artigas, Marta Maria. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaFil: Elias, Ana Georgina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; ArgentinaFil: Fernandez, Patricia Mónica. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; ArgentinaElsevier Ltd.2006-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/83989Zossi Artigas, Marta Maria; Elias, Ana Georgina; Fernandez, Patricia Mónica; Discrete wavelet analysis to assess long-term trends in geomagnetic activity; Elsevier Ltd.; Physics and Chemistry of the Earth; 31; 1-3; 12-2006; 77-801474-7065CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.pce.2005.03.009info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S147470650600012X?via%3Dihubinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:33:10Zoai:ri.conicet.gov.ar:11336/83989instacron: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:34982025-10-22 11:33:10.994CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Discrete wavelet analysis to assess long-term trends in geomagnetic activity
title Discrete wavelet analysis to assess long-term trends in geomagnetic activity
spellingShingle Discrete wavelet analysis to assess long-term trends in geomagnetic activity
Zossi Artigas, Marta Maria
Geomagnetic Activity
Wavelet Analysis
Long Term Trend
Solar Wind
title_short Discrete wavelet analysis to assess long-term trends in geomagnetic activity
title_full Discrete wavelet analysis to assess long-term trends in geomagnetic activity
title_fullStr Discrete wavelet analysis to assess long-term trends in geomagnetic activity
title_full_unstemmed Discrete wavelet analysis to assess long-term trends in geomagnetic activity
title_sort Discrete wavelet analysis to assess long-term trends in geomagnetic activity
dc.creator.none.fl_str_mv Zossi Artigas, Marta Maria
Elias, Ana Georgina
Fernandez, Patricia Mónica
author Zossi Artigas, Marta Maria
author_facet Zossi Artigas, Marta Maria
Elias, Ana Georgina
Fernandez, Patricia Mónica
author_role author
author2 Elias, Ana Georgina
Fernandez, Patricia Mónica
author2_role author
author
dc.subject.none.fl_str_mv Geomagnetic Activity
Wavelet Analysis
Long Term Trend
Solar Wind
topic Geomagnetic Activity
Wavelet Analysis
Long Term Trend
Solar Wind
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv To assess long-term trends in geomagnetic activity, the discrete wavelet transform using the Daubechies function was applied to aa and Dst for periods 1868–2003 and 1957–2003 respectively.Among a variety of techniques available for analysing trends, wavelet analysis has emerged in the last decade as a useful statistical tool for this purpose. The wavelet order and border conditions of the transform were selected minimizing the mean relative error. A sequence of alternating trends is obtained in the case of aa, with the greatest minima around 1880 and 1905 followed by 1965 and 2000. Maximum values occur around 1890, 1955 and 1990. Dst index shows the last two minima and the maximum around 1990. Long term trends in solar wind velocity, density and pressure, IMF magnitude B, southward component Bz, sunspot number Rz and the coronal index were also analysed in order to identify possible causes for the observed long-term variation in geomagnetic activity. They all qualitatively agree with aa and Dst behavior pointing out a solar origin.ior pointing out a solar origin.
Fil: Zossi Artigas, Marta Maria. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina
Fil: Elias, Ana Georgina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; Argentina
Fil: Fernandez, Patricia Mónica. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; Argentina
description To assess long-term trends in geomagnetic activity, the discrete wavelet transform using the Daubechies function was applied to aa and Dst for periods 1868–2003 and 1957–2003 respectively.Among a variety of techniques available for analysing trends, wavelet analysis has emerged in the last decade as a useful statistical tool for this purpose. The wavelet order and border conditions of the transform were selected minimizing the mean relative error. A sequence of alternating trends is obtained in the case of aa, with the greatest minima around 1880 and 1905 followed by 1965 and 2000. Maximum values occur around 1890, 1955 and 1990. Dst index shows the last two minima and the maximum around 1990. Long term trends in solar wind velocity, density and pressure, IMF magnitude B, southward component Bz, sunspot number Rz and the coronal index were also analysed in order to identify possible causes for the observed long-term variation in geomagnetic activity. They all qualitatively agree with aa and Dst behavior pointing out a solar origin.ior pointing out a solar origin.
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/11336/83989
Zossi Artigas, Marta Maria; Elias, Ana Georgina; Fernandez, Patricia Mónica; Discrete wavelet analysis to assess long-term trends in geomagnetic activity; Elsevier Ltd.; Physics and Chemistry of the Earth; 31; 1-3; 12-2006; 77-80
1474-7065
CONICET Digital
CONICET
url http://hdl.handle.net/11336/83989
identifier_str_mv Zossi Artigas, Marta Maria; Elias, Ana Georgina; Fernandez, Patricia Mónica; Discrete wavelet analysis to assess long-term trends in geomagnetic activity; Elsevier Ltd.; Physics and Chemistry of the Earth; 31; 1-3; 12-2006; 77-80
1474-7065
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.pce.2005.03.009
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S147470650600012X?via%3Dihub
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
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Ltd.
publisher.none.fl_str_mv Elsevier Ltd.
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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