A reappraisal of instrumental magnetic measurements made in Western Europe before AD 1750: confronting historical geomagnetism and archeomagnetismReportar como inadecuado




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1 IPGP - Institut de Physique du Globe de Paris

Abstract : We present a new compilation and analysis of historical geomagnetic measurements made in Western Europe beforeAD 1750. The dataset in its ensemble provides a coherent evolution of magnetic field directions. Several data pointsexcluded from previous analyses actually appear very consistent with most of the present compilation. A new averagehistorical curve is computed for Paris, which is in very good agreement with the archeomagnetic data obtained inFrance, while significantly differing from the directional curve expected for Paris before AD 1675 based on the gufm1model Jackson et al. in Philos Trans R Soc Lond A 358:957–990, 2000. This finding suggests that the older segment ofthe gufm1 model lacks reliability and should be improved. Similarly, the historical part of the regional geomagneticfield model built for Europe by Pavón-Carrasco et al. Geochem Geophys Geosyst 10:Q03013, 2009 should be revisedbecause it erroneously incorporates directions derived from the gufm1 model.

Keywords : Historical magnetism Archeomagnetism Secular variation Geomagnetic directions Western Europe





Autor: Maxime Le Goff - Yves Gallet -

Fuente: https://hal.archives-ouvertes.fr/



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