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 The dating is ascertained by historical documents complemented by archeological constraints.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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/5281
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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) |
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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1844613540147625984 |
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13.070432 |