Changes over time in the accuracy of analytical approximations for geomagnetic cutoff rigidity

Autores
Elias, Ana Georgina; Vega Caro, Maria Ailen; Abaca, Facundo Máximo; Zossi, Bruno Santiago
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The geomagnetic cutoff rigidity (Rc) is a key measure of the Earth´s magnetic shielding against charged particles. Rc can be estimated using computationally intensive trajectory-tracing methods requiring millions of particle trajectories or simplified analytical models, the latter often assuming a predominantly dipolar magnetic field. This study explores how the accuracy of analytical approximations evolves over time by comparing them to trajectory-based values from 1900 to 2020 using error statistical comparative parameters. The results obtained indicate growing discrepancies over time, with mean absolute errors increasing and spatial correlations declining as the geomagnetic field departs from dipolar symmetry. Analytical models show their greatest deviations in regions like the South Atlantic Anomaly and near the magnetic poles, but for the simplest model, there appear to be a compensation making the error quite stable in time. Despite these limitations, simple analytical models remain computationally efficient and valuable for capturing large-scale Rc trends. In addition, the simplicity of analytical models ensures their relevance for applications where computational resources are limited or where a rapid understanding of Rc behavior is required. However, as the geomagnetic field continues to decay, the discrepancies between analytical and numerical approaches are expected to grow. Even if currently they already exhibit global absolute errors on the order of 20% in the best cases, on geological timescales, when the field eventually returns to a predominantly dipolar state and with a dominance higher than the current of ∼80%, these formulas will regain their usefulness.
Fil: Elias, Ana Georgina. Universidad Nacional de Tucumán. Instituto de Física del Noroeste Argentino. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Noa Sur. Instituto de Física del Noroeste Argentino; Argentina
Fil: Vega Caro, Maria Ailen. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; Argentina
Fil: Abaca, Facundo Máximo. Universidad Nacional de Tucumán. Instituto de Física del Noroeste Argentino. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Noa Sur. Instituto de Física del Noroeste Argentino; Argentina
Fil: Zossi, Bruno Santiago. Universidad Nacional de Tucumán. Instituto de Física del Noroeste Argentino. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Noa Sur. Instituto de Física del Noroeste Argentino; Argentina
Materia
Rigidez de Corte
Campo geomagnético
Partículas cargadas
Modelos analiticos
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:11336/275416
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/275416
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Changes over time in the accuracy of analytical approximations for geomagnetic cutoff rigidityElias, Ana GeorginaVega Caro, Maria AilenAbaca, Facundo MáximoZossi, Bruno SantiagoRigidez de CorteCampo geomagnéticoPartículas cargadasModelos analiticoshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The geomagnetic cutoff rigidity (Rc) is a key measure of the Earth´s magnetic shielding against charged particles. Rc can be estimated using computationally intensive trajectory-tracing methods requiring millions of particle trajectories or simplified analytical models, the latter often assuming a predominantly dipolar magnetic field. This study explores how the accuracy of analytical approximations evolves over time by comparing them to trajectory-based values from 1900 to 2020 using error statistical comparative parameters. The results obtained indicate growing discrepancies over time, with mean absolute errors increasing and spatial correlations declining as the geomagnetic field departs from dipolar symmetry. Analytical models show their greatest deviations in regions like the South Atlantic Anomaly and near the magnetic poles, but for the simplest model, there appear to be a compensation making the error quite stable in time. Despite these limitations, simple analytical models remain computationally efficient and valuable for capturing large-scale Rc trends. In addition, the simplicity of analytical models ensures their relevance for applications where computational resources are limited or where a rapid understanding of Rc behavior is required. However, as the geomagnetic field continues to decay, the discrepancies between analytical and numerical approaches are expected to grow. Even if currently they already exhibit global absolute errors on the order of 20% in the best cases, on geological timescales, when the field eventually returns to a predominantly dipolar state and with a dominance higher than the current of ∼80%, these formulas will regain their usefulness.Fil: Elias, Ana Georgina. Universidad Nacional de Tucumán. Instituto de Física del Noroeste Argentino. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Noa Sur. Instituto de Física del Noroeste Argentino; ArgentinaFil: Vega Caro, Maria Ailen. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; ArgentinaFil: Abaca, Facundo Máximo. Universidad Nacional de Tucumán. Instituto de Física del Noroeste Argentino. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Noa Sur. Instituto de Física del Noroeste Argentino; ArgentinaFil: Zossi, Bruno Santiago. Universidad Nacional de Tucumán. Instituto de Física del Noroeste Argentino. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Noa Sur. Instituto de Física del Noroeste Argentino; ArgentinaAmerican Institute of Physics2025-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/275416Elias, Ana Georgina; Vega Caro, Maria Ailen; Abaca, Facundo Máximo; Zossi, Bruno Santiago; Changes over time in the accuracy of analytical approximations for geomagnetic cutoff rigidity; American Institute of Physics; Physics Of Plasmas; 32; 6; 6-2025; 1-111070-664XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.aip.org/pop/article/32/6/062905/3350034/Changes-over-time-in-the-accuracy-of-analyticalinfo:eu-repo/semantics/altIdentifier/doi/10.1063/5.0260984info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-12-03T09:34:18Zoai:ri.conicet.gov.ar:11336/275416instacron: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:34982025-12-03 09:34:18.62CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Changes over time in the accuracy of analytical approximations for geomagnetic cutoff rigidity
title Changes over time in the accuracy of analytical approximations for geomagnetic cutoff rigidity
spellingShingle Changes over time in the accuracy of analytical approximations for geomagnetic cutoff rigidity
Elias, Ana Georgina
Rigidez de Corte
Campo geomagnético
Partículas cargadas
Modelos analiticos
title_short Changes over time in the accuracy of analytical approximations for geomagnetic cutoff rigidity
title_full Changes over time in the accuracy of analytical approximations for geomagnetic cutoff rigidity
title_fullStr Changes over time in the accuracy of analytical approximations for geomagnetic cutoff rigidity
title_full_unstemmed Changes over time in the accuracy of analytical approximations for geomagnetic cutoff rigidity
title_sort Changes over time in the accuracy of analytical approximations for geomagnetic cutoff rigidity
dc.creator.none.fl_str_mv Elias, Ana Georgina
Vega Caro, Maria Ailen
Abaca, Facundo Máximo
Zossi, Bruno Santiago
author Elias, Ana Georgina
author_facet Elias, Ana Georgina
Vega Caro, Maria Ailen
Abaca, Facundo Máximo
Zossi, Bruno Santiago
author_role author
author2 Vega Caro, Maria Ailen
Abaca, Facundo Máximo
Zossi, Bruno Santiago
author2_role author
author
author
dc.subject.none.fl_str_mv Rigidez de Corte
Campo geomagnético
Partículas cargadas
Modelos analiticos
topic Rigidez de Corte
Campo geomagnético
Partículas cargadas
Modelos analiticos
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The geomagnetic cutoff rigidity (Rc) is a key measure of the Earth´s magnetic shielding against charged particles. Rc can be estimated using computationally intensive trajectory-tracing methods requiring millions of particle trajectories or simplified analytical models, the latter often assuming a predominantly dipolar magnetic field. This study explores how the accuracy of analytical approximations evolves over time by comparing them to trajectory-based values from 1900 to 2020 using error statistical comparative parameters. The results obtained indicate growing discrepancies over time, with mean absolute errors increasing and spatial correlations declining as the geomagnetic field departs from dipolar symmetry. Analytical models show their greatest deviations in regions like the South Atlantic Anomaly and near the magnetic poles, but for the simplest model, there appear to be a compensation making the error quite stable in time. Despite these limitations, simple analytical models remain computationally efficient and valuable for capturing large-scale Rc trends. In addition, the simplicity of analytical models ensures their relevance for applications where computational resources are limited or where a rapid understanding of Rc behavior is required. However, as the geomagnetic field continues to decay, the discrepancies between analytical and numerical approaches are expected to grow. Even if currently they already exhibit global absolute errors on the order of 20% in the best cases, on geological timescales, when the field eventually returns to a predominantly dipolar state and with a dominance higher than the current of ∼80%, these formulas will regain their usefulness.
Fil: Elias, Ana Georgina. Universidad Nacional de Tucumán. Instituto de Física del Noroeste Argentino. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Noa Sur. Instituto de Física del Noroeste Argentino; Argentina
Fil: Vega Caro, Maria Ailen. Universidad Nacional de Tucumán. Facultad de Ciencias Exactas y Tecnología; Argentina
Fil: Abaca, Facundo Máximo. Universidad Nacional de Tucumán. Instituto de Física del Noroeste Argentino. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Noa Sur. Instituto de Física del Noroeste Argentino; Argentina
Fil: Zossi, Bruno Santiago. Universidad Nacional de Tucumán. Instituto de Física del Noroeste Argentino. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Noa Sur. Instituto de Física del Noroeste Argentino; Argentina
description The geomagnetic cutoff rigidity (Rc) is a key measure of the Earth´s magnetic shielding against charged particles. Rc can be estimated using computationally intensive trajectory-tracing methods requiring millions of particle trajectories or simplified analytical models, the latter often assuming a predominantly dipolar magnetic field. This study explores how the accuracy of analytical approximations evolves over time by comparing them to trajectory-based values from 1900 to 2020 using error statistical comparative parameters. The results obtained indicate growing discrepancies over time, with mean absolute errors increasing and spatial correlations declining as the geomagnetic field departs from dipolar symmetry. Analytical models show their greatest deviations in regions like the South Atlantic Anomaly and near the magnetic poles, but for the simplest model, there appear to be a compensation making the error quite stable in time. Despite these limitations, simple analytical models remain computationally efficient and valuable for capturing large-scale Rc trends. In addition, the simplicity of analytical models ensures their relevance for applications where computational resources are limited or where a rapid understanding of Rc behavior is required. However, as the geomagnetic field continues to decay, the discrepancies between analytical and numerical approaches are expected to grow. Even if currently they already exhibit global absolute errors on the order of 20% in the best cases, on geological timescales, when the field eventually returns to a predominantly dipolar state and with a dominance higher than the current of ∼80%, these formulas will regain their usefulness.
publishDate 2025
dc.date.none.fl_str_mv 2025-06
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/11336/275416
Elias, Ana Georgina; Vega Caro, Maria Ailen; Abaca, Facundo Máximo; Zossi, Bruno Santiago; Changes over time in the accuracy of analytical approximations for geomagnetic cutoff rigidity; American Institute of Physics; Physics Of Plasmas; 32; 6; 6-2025; 1-11
1070-664X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/275416
identifier_str_mv Elias, Ana Georgina; Vega Caro, Maria Ailen; Abaca, Facundo Máximo; Zossi, Bruno Santiago; Changes over time in the accuracy of analytical approximations for geomagnetic cutoff rigidity; American Institute of Physics; Physics Of Plasmas; 32; 6; 6-2025; 1-11
1070-664X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://pubs.aip.org/pop/article/32/6/062905/3350034/Changes-over-time-in-the-accuracy-of-analytical
info:eu-repo/semantics/altIdentifier/doi/10.1063/5.0260984
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
application/pdf
dc.publisher.none.fl_str_mv American Institute of Physics
publisher.none.fl_str_mv American Institute of Physics
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 12.913667

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