Model that covers the past 100.000 years and it is the longest global reconstruction of the geomagnetic field
GGF100k is a global geomagnetic field model covering the past 100,000 years. It is the first model that provides a global view of the geomagnetic field evolution over an extended period. The model is based on an extensive global dataset of over 100 sediment records, and volcanic data. The geomagnetic axial dipole moment exhibits a broad range of variations, with the lowest value during the Laschamps excursion (41,000 year ago). Other excursions appear in limited locations and are likely regional events.
Citation
- Panovska, S., Constable, C. G., & Korte, M. (2018). Extending global continuous geomagnetic field reconstructions on timescales beyond human civilization. Geochem. Geophys. Geosyst., 19. doi: 10.1029/2018GC007966
- Panovska, S., Korte, M., & Constable, C. G. (2019). One hundred thousand years of geomagnetic field evolution. Rev. Geophys., 57. doi: 10.1029/2019RG000656
Downloads
- https://earthref.org/ERDA/2382/ model coefficients and codes
- https://earthref.org/ERDA/2384/ model animations
A Link to the Eos Editors’ Vox article by AGU: https://eos.org/editors-vox/the-global-geomagnetic-field-of-the-past-hundred-thousand-years
