Long-term changes in solar quiet (Sq) geomagnetic variations related to Earth?s magnetic field secular variation
The daily amplitude of the solar quiet (Sq) magnetic variation of the horizontal intensity, H, of observatories at low and midlatitudes is analyzed, in search of significant long‐term trends. These trends are expected based on secular variations of the Earth's magnetic field (B) and increasing...
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ftconicet:oai:ri.conicet.gov.ar:11336/77314 2023-10-09T21:47:18+02:00 Long-term changes in solar quiet (Sq) geomagnetic variations related to Earth?s magnetic field secular variation de Haro Barbás, Blas Federico Elias, Ana Georgina Cnossen, Ingrid Zossi Artigas, Marta Maria application/pdf http://hdl.handle.net/11336/77314 eng eng American Geophysical Union info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1002/jgra.50352 info:eu-repo/semantics/altIdentifier/doi/10.1002/jgra.50352, 2013 http://hdl.handle.net/11336/77314 de Haro Barbás, Blas Federico; Elias, Ana Georgina; Cnossen, Ingrid; Zossi Artigas, Marta Maria; Long-term changes in solar quiet (Sq) geomagnetic variations related to Earth?s magnetic field secular variation; American Geophysical Union; Journal of Geophysical Research; 118; 6; 1-2013; 3712-3718 0148-0227 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ SQ MAGNETIC FIELD TREND MODEL https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1002/jgra.50352, 2013 2023-09-24T18:36:21Z The daily amplitude of the solar quiet (Sq) magnetic variation of the horizontal intensity, H, of observatories at low and midlatitudes is analyzed, in search of significant long‐term trends. These trends are expected based on secular variations of the Earth's magnetic field (B) and increasing concentrations of greenhouse gases which can affect Sq for instance through their effect on ionospheric conductivities and E‐region electron concentration. The hourly horizontal geomagnetic field component, H, measured at Apia, Fredericksburg, Hermanus, Bangui, and Trivandrum was analyzed for the period 1960–2000. The solar activity effect was filtered out from the daily Sq amplitude of H, and then linear trends were calculated and compared to trend values obtained from the Coupled Magnetosphere‐Ionosphere‐Thermosphere model. Linear trends were calculated separately for periods of different secular trends in the magnetic field intensity, B. We found significant trends in experimental data for Apia, Fredericksburg, Hermanus, and for the period 1960–1983 for Bangui. There is reasonable quantitative agreement between experimental and simulated trends, and a qualitative agreement with trends expected from the secular trend in B. Fil: de Haro Barbás, Blas Federico. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física; Argentina Fil: Elias, Ana Georgina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina Fil: Cnossen, Ingrid. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física; Argentina Fil: Zossi Artigas, Marta Maria. British Antartic Survey; Reino Unido. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina Article in Journal/Newspaper antartic* CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina Tucumán ENVELOPE(-63.200,-63.200,-64.683,-64.683) Artigas ENVELOPE(-58.902,-58.902,-62.184,-62.184) Haro ENVELOPE(-59.783,-59.783,-62.533,-62.533) |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
SQ MAGNETIC FIELD TREND MODEL https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
SQ MAGNETIC FIELD TREND MODEL https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 de Haro Barbás, Blas Federico Elias, Ana Georgina Cnossen, Ingrid Zossi Artigas, Marta Maria Long-term changes in solar quiet (Sq) geomagnetic variations related to Earth?s magnetic field secular variation |
topic_facet |
SQ MAGNETIC FIELD TREND MODEL https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The daily amplitude of the solar quiet (Sq) magnetic variation of the horizontal intensity, H, of observatories at low and midlatitudes is analyzed, in search of significant long‐term trends. These trends are expected based on secular variations of the Earth's magnetic field (B) and increasing concentrations of greenhouse gases which can affect Sq for instance through their effect on ionospheric conductivities and E‐region electron concentration. The hourly horizontal geomagnetic field component, H, measured at Apia, Fredericksburg, Hermanus, Bangui, and Trivandrum was analyzed for the period 1960–2000. The solar activity effect was filtered out from the daily Sq amplitude of H, and then linear trends were calculated and compared to trend values obtained from the Coupled Magnetosphere‐Ionosphere‐Thermosphere model. Linear trends were calculated separately for periods of different secular trends in the magnetic field intensity, B. We found significant trends in experimental data for Apia, Fredericksburg, Hermanus, and for the period 1960–1983 for Bangui. There is reasonable quantitative agreement between experimental and simulated trends, and a qualitative agreement with trends expected from the secular trend in B. Fil: de Haro Barbás, Blas Federico. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física; Argentina Fil: Elias, Ana Georgina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina Fil: Cnossen, Ingrid. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología. Departamento de Física; Argentina Fil: Zossi Artigas, Marta Maria. British Antartic Survey; Reino Unido. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; Argentina |
format |
Article in Journal/Newspaper |
author |
de Haro Barbás, Blas Federico Elias, Ana Georgina Cnossen, Ingrid Zossi Artigas, Marta Maria |
author_facet |
de Haro Barbás, Blas Federico Elias, Ana Georgina Cnossen, Ingrid Zossi Artigas, Marta Maria |
author_sort |
de Haro Barbás, Blas Federico |
title |
Long-term changes in solar quiet (Sq) geomagnetic variations related to Earth?s magnetic field secular variation |
title_short |
Long-term changes in solar quiet (Sq) geomagnetic variations related to Earth?s magnetic field secular variation |
title_full |
Long-term changes in solar quiet (Sq) geomagnetic variations related to Earth?s magnetic field secular variation |
title_fullStr |
Long-term changes in solar quiet (Sq) geomagnetic variations related to Earth?s magnetic field secular variation |
title_full_unstemmed |
Long-term changes in solar quiet (Sq) geomagnetic variations related to Earth?s magnetic field secular variation |
title_sort |
long-term changes in solar quiet (sq) geomagnetic variations related to earth?s magnetic field secular variation |
publisher |
American Geophysical Union |
url |
http://hdl.handle.net/11336/77314 |
long_lat |
ENVELOPE(-63.200,-63.200,-64.683,-64.683) ENVELOPE(-58.902,-58.902,-62.184,-62.184) ENVELOPE(-59.783,-59.783,-62.533,-62.533) |
geographic |
Argentina Tucumán Artigas Haro |
geographic_facet |
Argentina Tucumán Artigas Haro |
genre |
antartic* |
genre_facet |
antartic* |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1002/jgra.50352 info:eu-repo/semantics/altIdentifier/doi/10.1002/jgra.50352, 2013 http://hdl.handle.net/11336/77314 de Haro Barbás, Blas Federico; Elias, Ana Georgina; Cnossen, Ingrid; Zossi Artigas, Marta Maria; Long-term changes in solar quiet (Sq) geomagnetic variations related to Earth?s magnetic field secular variation; American Geophysical Union; Journal of Geophysical Research; 118; 6; 1-2013; 3712-3718 0148-0227 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1002/jgra.50352, 2013 |
_version_ |
1779310324707491840 |