Abstract
Background: GEOMAGIA50.v3 is a comprehensive online database providing access to published paleomagnetic, rock magnetic, and chronological data from a variety of materials that record Earth's magnetic field over the past 50 ka. Findings: Since its original release in 2006, the structure and function of the database have been updated and a significant number of data have been added. Notable modifications are the following: (1) the inclusion of additional intensity, directional and metadata from archeological and volcanic materials and an improved documentation of radiocarbon dates; (2) a new data model to accommodate paleomagnetic, rock magnetic, and chronological data from lake and marine sediments; (3) a refinement of the geographic constraints in the archeomagnetic/volcanic query allowing selection of particular locations; (4) more flexible methodological and statistical constraints in the archeomagnetic/volcanic query; (5) the calculation of predictions of the Holocene geomagnetic field from a series of time varying global field models; (6) searchable reference lists; and (7) an updated web interface. This paper describes general modifications to the database and specific aspects of the archeomagnetic and volcanic database. The reader is referred to a companion publication for a description of the sediment database. Conclusions: The archeomagnetic and volcanic part of GEOMAGIA50.v3 currently contains 14,645 data (declination, inclination, and paleointensity) from 461 studies published between 1959 and 2014. We review the paleomagnetic methods used to obtain these data and discuss applications of the data within the database. The database continues to expand as legacy data are added and new studies published. The web-based interface can be found at http://geomagia.gfz-potsdam.de.
| Original language | English (US) |
|---|---|
| Article number | 83 |
| Journal | Earth, Planets and Space |
| Volume | 67 |
| Issue number | 1 |
| DOIs | |
| State | Published - Dec 15 2015 |
| Externally published | Yes |
Bibliographical note
Funding Information:GEOMAGIA50 was initiated at the 5th Nordic Paleomagnetic Workshop, 25-30th September 2004, Suitia, Finland. It is an international collaboration funded by the US National Science Foundation (EAR-IF-0744107 and EAR-IF-1225363) and Deutsche Forschungsgemeinshcaft (DFG) SPP PlanetMag 1488 (KO2870/4-1 and BR4697/1) (MK and MCB). FD acknowledges the support of the Swiss National Science Foundation (project numbers 130147 and 144102). AN was funded by the Natural Environment Research Council (NERC) grant NE/I013873/1 and the Swedish Research Council (Dnr 2014-4125). AL was funded by NERC grant NE/D002362/1. CGC gratefully acknowledges support from the Alexander von Humboldt Foundation and US National Science Foundation Grant NSF EAR 12225364. The authors would like to thank Mary Kovacheva (Bulgarian Academy of Sciences) for her assistance with the Bulgarian data sets. MCB thanks Martin Rother for his assistance with PHP and HTML coding and Alex Jordan for technical support. Some of the figures were produced using GMT (). The contributions of all researchers who provided data and aided with comments on the structure and functionality of the database are greatly appreciated. We are grateful to Greig Paterson and an anonymous reviewer for their thoughtful comments.
Publisher Copyright:
© 2015 Brown et al.
Keywords
- Archeomagnetism
- Database
- GEOMAGIA50
- Geomagnetism
- Paleomagnetism