Publication: SCHA.DIF.4k: 4,000 years of paleomagnetic reconstruction for Europe and its application for dating
Loading...
Official URL
Full text at PDC
Publication Date
2021-03
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
American Geophysical Union
Citations
Exportar
Abstract
Since the publication of the European archaeomagnetic field model SCHA.DIF.3k in 2009, the number of paleomagnetic data derived from archaeological materials such as baked clays and volcanic rocks coming from Europe has increased by about 90% for directions and around 180% for intensities. Taking advantage of this increase, here we provide an updated regional archaeomagnetic model, called SCHA.DIF.4k, for the European continent and adjacent areas and now covering the last four millennia. To model the three geomagnetic elements, declination, inclination, and intensity, we use the regional R-SCHA2D technique in space and temporal basis of cubic splines. A critical selection of the archaeomagnetic and volcanic data available in a spherical cap of 30° centered at 40°N latitude and 10°E longitude has been considered. In addition, in order to better constrain the behavior of the archaeomagnetic field during the last centuries, we include the historical data of the HISTMAG compilation. The new regional model allows us to better define the paleomagnetic field over Europe as well as to generate new paleosecular variation curves for archaeomagnetic dating purposes. Using these curves, the dating precision has been estimated for the last 4 kyr. As expected, results show that it strongly depends on the data uncertainties, the temporal data distribution and the behavior of the geomagnetic field itself. In addition, the use of the full vector geomagnetic field, instead of the directional information exclusively, provides more precise archaeomagnetic dating results.
Description
© 2021 American Geophysical Union. The authors are grateful to the Spanish research projects PGC2018-099103- A-I00, CGL2015-63888-R, FJC2018- 037643-I, CGL2017-87015-P of the Spanish Ministry of Science, Innovation and Universities. Saioa A. Campuzano thanks Juan de la Cierva-Formación program (FJC2018-037643-I). MRM acknowledges the FPI BES-2016-077257 grant. They appreciate the contribution of the i-COOP+2020 project COOPB20514 funded by the CSIC and acknowledge the professional support of the CSIC Interdisciplinary Thematic Platform Open Heritage: Research and Society (PTI-PAIS). In addition, they would like also to thank the editor Dr. Isabelle Manighetti and associate editor Dr. Mark Dekkers, the reviewer Dr. Ron Shaar, and an anonymous reviewer. Dr. Erwan Thébault is also acknowledged for providing the code of SCH functions. Finally, but not less important, the authors acknowledge the paleomagnetic community for sampling, measuring and providing more and more archaeomagnetic and volcanic data to better understand the past of our geomagnetic field.