Variation of the Earth's Magnetic Field Strength in South America During the Last Two Millennia: New results from Historical Buildings of Buenos Aires and Re-evaluation of Regional...

Autores
Goguitchaichvili, Avto; Morales, Juan; Schavelzon Chavin, Daniel Gaston; Vasquez, Carlos Alberto; Gogorza, Claudia Susana; Loponte, Daniel Marcelo; Augusto Rapalini
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The causes of systematic decay of the Earth´s Magnetic Field strength since eighteen century have been a matter of debate during the last decade. It is also well known that such variations may have completely different expressions under an area characterized with strong magnetic anomalies, such as the South Atlantic Magnetic Anomaly. To fully understand these atypical phenomena, it is crucial to retrieve the past evolution of Earth´s magnetic field beyond the observatory records. We report a detailed rock-magnetic and archeointensity investigations from some well-studied historical buildings of Buenos Aires city, located in the hearth of the South Atlantic Magnetic Anomaly. Samples consist of bricks, tiles, fireplaces and pottery which are considered as highly suitable materials for archaeointensity studies. The dating is ascertained by historical documents complemented by archeological constraints. Eighteen out of 26 analyzed samples yield reliable absolute intensity determinations. The site-mean archaeointensity values obtained in this study range from 28.5 to 43.5 µT, with corresponding virtual axial dipole moments (VADMs) ranging from 5.3 to 8.04 1022 Am2. Most determinations obtained in the present study show remarkable agreement with the values predicted by the time varying field model CALS10k.1b [Korte et al. 2011]. South American archaeointensity database now includes absolute intensities from 400 to 1930 AD based on 63 selected archaeointensity determinations. The data set shows several distinct periods of quite large fluctuations of intensity. However, most data are concentrated into a relatively narrow interval from ad 1250 to ad 1450. At the beginning of the record, values between 400 AD and 830 AD match well with ARCH3K model. Some general features may be detected: the time intervals from about AD 400 to 950 and 1150 to 1280 are characterized by a quite monotonic decrease of geomagnetic intensity, while some increase is observed from AD 950 to 1250. In contrast, a systematic intensity decay is detected from 1550 to 1930 in excellent agreement with the model data. No firm evidence of correlation between the climate changes over multi-decadal time scales and geomagnetic intensity was found for South America.
Fil: Goguitchaichvili, Avto. Universidad Nacional Autónoma de México; México
Fil: Morales, Juan. Universidad Nacional Autónoma de México; México
Fil: Schavelzon Chavin, Daniel Gaston. Universidad de Buenos Aires. Facultad de Arquitectura y Urbanismo. Instituto de Arte Americano e Investigaciones Estéticas "Mario J. Buschiazzo". Centro de Arqueologia Urbana; Argentina
Fil: Vasquez, Carlos Alberto. Universidad de Buenos Aires. Ciclo Básico Común; Argentina
Fil: Gogorza, Claudia Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
Fil: Loponte, Daniel Marcelo. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Augusto Rapalini. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
Materia
Earth´S Magnetic Field
Secular Variation
Archeomagnetism
South America
Argentina
Buenos Aires
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/5281

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network_name_str CONICET Digital (CONICET)
spelling Variation of the Earth's Magnetic Field Strength in South America During the Last Two Millennia: New results from Historical Buildings of Buenos Aires and Re-evaluation of Regional DataGoguitchaichvili, AvtoMorales, JuanSchavelzon Chavin, Daniel GastonVasquez, Carlos AlbertoGogorza, Claudia SusanaLoponte, Daniel MarceloAugusto RapaliniEarth´S Magnetic FieldSecular VariationArcheomagnetismSouth AmericaArgentinaBuenos Aireshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The causes of systematic decay of the Earth´s Magnetic Field strength since eighteen century have been a matter of debate during the last decade. It is also well known that such variations may have completely different expressions under an area characterized with strong magnetic anomalies, such as the South Atlantic Magnetic Anomaly. To fully understand these atypical phenomena, it is crucial to retrieve the past evolution of Earth´s magnetic field beyond the observatory records. We report a detailed rock-magnetic and archeointensity investigations from some well-studied historical buildings of Buenos Aires city, located in the hearth of the South Atlantic Magnetic Anomaly. Samples consist of bricks, tiles, fireplaces and pottery which are considered as highly suitable materials for archaeointensity studies. The dating is ascertained by historical documents complemented by archeological constraints. Eighteen out of 26 analyzed samples yield reliable absolute intensity determinations. The site-mean archaeointensity values obtained in this study range from 28.5 to 43.5 µT, with corresponding virtual axial dipole moments (VADMs) ranging from 5.3 to 8.04 1022 Am2. Most determinations obtained in the present study show remarkable agreement with the values predicted by the time varying field model CALS10k.1b [Korte et al. 2011]. South American archaeointensity database now includes absolute intensities from 400 to 1930 AD based on 63 selected archaeointensity determinations. The data set shows several distinct periods of quite large fluctuations of intensity. However, most data are concentrated into a relatively narrow interval from ad 1250 to ad 1450. At the beginning of the record, values between 400 AD and 830 AD match well with ARCH3K model. Some general features may be detected: the time intervals from about AD 400 to 950 and 1150 to 1280 are characterized by a quite monotonic decrease of geomagnetic intensity, while some increase is observed from AD 950 to 1250. In contrast, a systematic intensity decay is detected from 1550 to 1930 in excellent agreement with the model data. No firm evidence of correlation between the climate changes over multi-decadal time scales and geomagnetic intensity was found for South America.Fil: Goguitchaichvili, Avto. Universidad Nacional Autónoma de México; MéxicoFil: Morales, Juan. Universidad Nacional Autónoma de México; MéxicoFil: Schavelzon Chavin, Daniel Gaston. Universidad de Buenos Aires. Facultad de Arquitectura y Urbanismo. Instituto de Arte Americano e Investigaciones Estéticas "Mario J. Buschiazzo". Centro de Arqueologia Urbana; ArgentinaFil: Vasquez, Carlos Alberto. Universidad de Buenos Aires. Ciclo Básico Común; ArgentinaFil: Gogorza, Claudia Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; ArgentinaFil: Loponte, Daniel Marcelo. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Augusto Rapalini. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; ArgentinaElsevier2015-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/mswordapplication/pdfhttp://hdl.handle.net/11336/5281Goguitchaichvili, Avto; Morales, Juan; Schavelzon Chavin, Daniel Gaston; Vasquez, Carlos Alberto; Gogorza, Claudia Susana; et al.; Variation of the Earth's Magnetic Field Strength in South America During the Last Two Millennia: New results from Historical Buildings of Buenos Aires and Re-evaluation of Regional Data; Elsevier; Physics of the Earth and Planetary Interiors; 245; 9-2015; 15-250031-9201enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0031920115000795info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pepi.2015.05.006info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:49:50Zoai:ri.conicet.gov.ar:11336/5281instacron: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 09:49:50.758CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Variation of the Earth's Magnetic Field Strength in South America During the Last Two Millennia: New results from Historical Buildings of Buenos Aires and Re-evaluation of Regional Data
title Variation of the Earth's Magnetic Field Strength in South America During the Last Two Millennia: New results from Historical Buildings of Buenos Aires and Re-evaluation of Regional Data
spellingShingle Variation of the Earth's Magnetic Field Strength in South America During the Last Two Millennia: New results from Historical Buildings of Buenos Aires and Re-evaluation of Regional Data
Goguitchaichvili, Avto
Earth´S Magnetic Field
Secular Variation
Archeomagnetism
South America
Argentina
Buenos Aires
title_short Variation of the Earth's Magnetic Field Strength in South America During the Last Two Millennia: New results from Historical Buildings of Buenos Aires and Re-evaluation of Regional Data
title_full Variation of the Earth's Magnetic Field Strength in South America During the Last Two Millennia: New results from Historical Buildings of Buenos Aires and Re-evaluation of Regional Data
title_fullStr Variation of the Earth's Magnetic Field Strength in South America During the Last Two Millennia: New results from Historical Buildings of Buenos Aires and Re-evaluation of Regional Data
title_full_unstemmed Variation of the Earth's Magnetic Field Strength in South America During the Last Two Millennia: New results from Historical Buildings of Buenos Aires and Re-evaluation of Regional Data
title_sort Variation of the Earth's Magnetic Field Strength in South America During the Last Two Millennia: New results from Historical Buildings of Buenos Aires and Re-evaluation of Regional Data
dc.creator.none.fl_str_mv Goguitchaichvili, Avto
Morales, Juan
Schavelzon Chavin, Daniel Gaston
Vasquez, Carlos Alberto
Gogorza, Claudia Susana
Loponte, Daniel Marcelo
Augusto Rapalini
author Goguitchaichvili, Avto
author_facet Goguitchaichvili, Avto
Morales, Juan
Schavelzon Chavin, Daniel Gaston
Vasquez, Carlos Alberto
Gogorza, Claudia Susana
Loponte, Daniel Marcelo
Augusto Rapalini
author_role author
author2 Morales, Juan
Schavelzon Chavin, Daniel Gaston
Vasquez, Carlos Alberto
Gogorza, Claudia Susana
Loponte, Daniel Marcelo
Augusto Rapalini
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Earth´S Magnetic Field
Secular Variation
Archeomagnetism
South America
Argentina
Buenos Aires
topic Earth´S Magnetic Field
Secular Variation
Archeomagnetism
South America
Argentina
Buenos Aires
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The causes of systematic decay of the Earth´s Magnetic Field strength since eighteen century have been a matter of debate during the last decade. It is also well known that such variations may have completely different expressions under an area characterized with strong magnetic anomalies, such as the South Atlantic Magnetic Anomaly. To fully understand these atypical phenomena, it is crucial to retrieve the past evolution of Earth´s magnetic field beyond the observatory records. We report a detailed rock-magnetic and archeointensity investigations from some well-studied historical buildings of Buenos Aires city, located in the hearth of the South Atlantic Magnetic Anomaly. Samples consist of bricks, tiles, fireplaces and pottery which are considered as highly suitable materials for archaeointensity studies. The dating is ascertained by historical documents complemented by archeological constraints. Eighteen out of 26 analyzed samples yield reliable absolute intensity determinations. The site-mean archaeointensity values obtained in this study range from 28.5 to 43.5 µT, with corresponding virtual axial dipole moments (VADMs) ranging from 5.3 to 8.04 1022 Am2. Most determinations obtained in the present study show remarkable agreement with the values predicted by the time varying field model CALS10k.1b [Korte et al. 2011]. South American archaeointensity database now includes absolute intensities from 400 to 1930 AD based on 63 selected archaeointensity determinations. The data set shows several distinct periods of quite large fluctuations of intensity. However, most data are concentrated into a relatively narrow interval from ad 1250 to ad 1450. At the beginning of the record, values between 400 AD and 830 AD match well with ARCH3K model. Some general features may be detected: the time intervals from about AD 400 to 950 and 1150 to 1280 are characterized by a quite monotonic decrease of geomagnetic intensity, while some increase is observed from AD 950 to 1250. In contrast, a systematic intensity decay is detected from 1550 to 1930 in excellent agreement with the model data. No firm evidence of correlation between the climate changes over multi-decadal time scales and geomagnetic intensity was found for South America.
Fil: Goguitchaichvili, Avto. Universidad Nacional Autónoma de México; México
Fil: Morales, Juan. Universidad Nacional Autónoma de México; México
Fil: Schavelzon Chavin, Daniel Gaston. Universidad de Buenos Aires. Facultad de Arquitectura y Urbanismo. Instituto de Arte Americano e Investigaciones Estéticas "Mario J. Buschiazzo". Centro de Arqueologia Urbana; Argentina
Fil: Vasquez, Carlos Alberto. Universidad de Buenos Aires. Ciclo Básico Común; Argentina
Fil: Gogorza, Claudia Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
Fil: Loponte, Daniel Marcelo. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Augusto Rapalini. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
description The causes of systematic decay of the Earth´s Magnetic Field strength since eighteen century have been a matter of debate during the last decade. It is also well known that such variations may have completely different expressions under an area characterized with strong magnetic anomalies, such as the South Atlantic Magnetic Anomaly. To fully understand these atypical phenomena, it is crucial to retrieve the past evolution of Earth´s magnetic field beyond the observatory records. We report a detailed rock-magnetic and archeointensity investigations from some well-studied historical buildings of Buenos Aires city, located in the hearth of the South Atlantic Magnetic Anomaly. Samples consist of bricks, tiles, fireplaces and pottery which are considered as highly suitable materials for archaeointensity studies. The dating is ascertained by historical documents complemented by archeological constraints. Eighteen out of 26 analyzed samples yield reliable absolute intensity determinations. The site-mean archaeointensity values obtained in this study range from 28.5 to 43.5 µT, with corresponding virtual axial dipole moments (VADMs) ranging from 5.3 to 8.04 1022 Am2. Most determinations obtained in the present study show remarkable agreement with the values predicted by the time varying field model CALS10k.1b [Korte et al. 2011]. South American archaeointensity database now includes absolute intensities from 400 to 1930 AD based on 63 selected archaeointensity determinations. The data set shows several distinct periods of quite large fluctuations of intensity. However, most data are concentrated into a relatively narrow interval from ad 1250 to ad 1450. At the beginning of the record, values between 400 AD and 830 AD match well with ARCH3K model. Some general features may be detected: the time intervals from about AD 400 to 950 and 1150 to 1280 are characterized by a quite monotonic decrease of geomagnetic intensity, while some increase is observed from AD 950 to 1250. In contrast, a systematic intensity decay is detected from 1550 to 1930 in excellent agreement with the model data. No firm evidence of correlation between the climate changes over multi-decadal time scales and geomagnetic intensity was found for South America.
publishDate 2015
dc.date.none.fl_str_mv 2015-09
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/11336/5281
Goguitchaichvili, Avto; Morales, Juan; Schavelzon Chavin, Daniel Gaston; Vasquez, Carlos Alberto; Gogorza, Claudia Susana; et al.; Variation of the Earth's Magnetic Field Strength in South America During the Last Two Millennia: New results from Historical Buildings of Buenos Aires and Re-evaluation of Regional Data; Elsevier; Physics of the Earth and Planetary Interiors; 245; 9-2015; 15-25
0031-9201
url http://hdl.handle.net/11336/5281
identifier_str_mv Goguitchaichvili, Avto; Morales, Juan; Schavelzon Chavin, Daniel Gaston; Vasquez, Carlos Alberto; Gogorza, Claudia Susana; et al.; Variation of the Earth's Magnetic Field Strength in South America During the Last Two Millennia: New results from Historical Buildings of Buenos Aires and Re-evaluation of Regional Data; Elsevier; Physics of the Earth and Planetary Interiors; 245; 9-2015; 15-25
0031-9201
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0031920115000795
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.pepi.2015.05.006
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/msword
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)
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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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