A Regional Archaeomagnetic Model for the Palaeointensity in Europe for the last 2000 Years and its Implications for Climatic Change

Pavón-Carrasco, Fco. Javier; Osete, M. L.; Torta, J. M.; Gaya–Piqué, Luis R.

doi:10.1007/s00024-008-0354-4

Cited by 10 publications

(11 citation statements)

References 36 publications

(75 reference statements)

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“…On the other hand, Gallet et al [2005] compared the advance and retreat of the Alpine Glaciers during the last three millennia with increases and decreases of the geomagnetic field intensity in Paris estimated from archaeomagnetic data (palaeomagnetic data from heated archaeological artefacts). A later work with a more complete palaeomagnetic intensity database corroborated a similar connection at European continental scale [Pavón-Carrasco et al, 2008]. The results of these studies suggest a possible link between centennial-scale cooling episodes and enhanced geomagnetic intensity, the opposite to the galactic cosmic rays mechanism [Svensmark, 1998;Christl et al, 2004;Usoskin and Kovaltsov, 2008;Thouveny et al, 2008;Kitaba et al, 2013] but in agreement with the first links established in the 70's by Bucha [1976Bucha [ , 1978 and Wollin et al [1971].…”

Section: Introductionsupporting

confidence: 81%

Transfer Entropy between South Atlantic Anomaly and Global Sea Level for the last 300 years

Campuzano

Santis

Pavón‐Carrasco

et al. 2016

Preprint

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Abstract. An innovative information-theoretic tool, transfer entropy, has been applied to measure the possible information flow and sense between two real time series: the South Atlantic Anomaly (SAA) area extent at the Earth's surface and the Global Sea Level (GSL) rise anomalies for the last 300 years. This connection was previously suggested considering only the long term trend. Now we study the possibility of that this relation also happens in shorter scales. The new results seem to support again this hypothesis, with more information transferred from the SAA to the GSL anomalies, with about 90 % of confidence level. This could provide a new clue on the existence of a link between the geomagnetic field and the Earth's climate in the past.

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Section: Introductionsupporting

confidence: 81%

Transfer Entropy between South Atlantic Anomaly and Global Sea Level for the last 300 years

Campuzano

Santis

Pavón‐Carrasco

et al. 2016

Preprint

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“…In a recent paper, we proposed an initial regional model (the SCHA.DI.00 model [ Pavón‐Carrasco et al , 2008a]) to describe the directional behavior of the paleomagnetic field in Europe for the last 2000 years, which was afterward updated by also modeling the paleointensity (the SCHA.DI.00‐F model [ Pavón‐Carrasco et al , 2008b]). The SCHA.DI.00 and SCHA.DI.00‐F models were developed using the spherical cap harmonic analysis technique (SCHA [ Haines , 1985]) applied to directional data from five of the Bayesian European PSVC based on archeomagnetic data [ Pavón‐Carrasco et al , 2008a, and references therein].…”

Section: Introductionmentioning

confidence: 99%

“…The main differences between the SCHA.DIF.3K model and the initial SCHA.DI.00‐F model [ Pavón‐Carrasco et al , 2008b] are as follows:…”

Section: Introductionmentioning

confidence: 99%

A regional archeomagnetic model for Europe for the last 3000 years, SCHA.DIF.3K: Applications to archeomagnetic dating

Pavón-Carrasco

Osete

Torta

et al. 2009

Geochem Geophys Geosyst

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131

156

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The available European database of archeomagnetic field values and instrumental data has been used to produce a regional model for the geomagnetic field in Europe for the last 3000 years (from 1000 B.C. to 1900 A.D., connecting with the epoch covered by the IGRF models). This new model, SCHA.DIF.3K, constitutes an improvement with respect to the previous regional archeomagnetic model SCHA.DI.00‐F, which used relocated values and was only valid for the last 2000 years. The new model has been obtained by least sums of absolute deviation inversion of paleomagnetic data using spherical cap harmonics for the spatial representation of the field and sliding windows in time. An algorithm has been developed to jointly model the three archeomagnetic elements declination, inclination, and intensity. The resulting model provides the direction and intensity of the Earth's magnetic field over the European continent, northern Africa, and western Asia for the last 3000 years. The fit to the European archeomagnetic database is more accurate than that provided by global archeomagnetic models. In addition, this model represents a step forward in archeomagnetic dating studies (since the relocation error is avoided) and can also be used to study the rapid changes of the geomagnetic field (archeomagnetic jerks) that have been recently proposed.

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“…Available archaeomagnetic directional data, in some cases supplemented by volcanic and sedimentary palaeomagnetic data, have been used to compute global (Hongre et al 1998; Korte & Constable 2003) and regional geomagnetic field models (Pavón‐Carrasco et al 2008a). Updated models now include palaeointensity information (Korte & Constable 2005; Pavón‐Carrasco et al 2008b; Pavón‐Carrasco et al 2009). Such models are rapidly improving but their consistency highly depends on the quantity, quality and geographic distribution of the reference data set.…”

Section: Introductionmentioning

confidence: 99%

Archaeointensity determinations from Italy: new data and the Earth's magnetic field strength variation over the past three millennia

Tema¹,

Goguitchaichvili²,

Camps

2010

Geophysical Journal International

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International audienceThree kilns and a collection of baked bricks from Italian archaeological sites have been studied for archaeointensity determination using the Thellier method as modified by Coe. All sites are dated based on archaeological information and their ages range from 500 to 800 AD and 1500 to 1700 AD. Rock magnetic studies identify magnetite, Ti- magnetite and hematite as the main magnetic minerals, and magnetic susceptibility versus temperature shows a good thermal stability of the samples. The intensity results have been corrected for anisotropy of the thermoremanent magnetization and cooling rate effects. The new data together with 136 previously published results are used to estimate the variation of the Earth's magnetic field over the past three millennia. The time distribution of the Italian absolute intensity data is irregular with the majority of determinations concentrated during the last four centuries, while older periods are very poorly covered. Most of the data come from volcanic rocks and show significant discrepancies. All data have been compared with archaeointensity results from Europe and regional and global models predictions. This work indicates the need to obtain more high quality archaeointensity results, in particular for the periods older than 200 BC and between 200 and 1000 AD, in order to determine a robust Italian intensity secular variation curve that, in combination with directional data, could be used for archaeomagnetic dating

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A Regional Archaeomagnetic Model for the Palaeointensity in Europe for the last 2000 Years and its Implications for Climatic Change

Cited by 10 publications

References 36 publications

Transfer Entropy between South Atlantic Anomaly and Global Sea Level for the last 300 years

Transfer Entropy between South Atlantic Anomaly and Global Sea Level for the last 300 years

A regional archeomagnetic model for Europe for the last 3000 years, SCHA.DIF.3K: Applications to archeomagnetic dating

Archaeointensity determinations from Italy: new data and the Earth's magnetic field strength variation over the past three millennia

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