Alexandre Fournier

TL;DR: The 12th generation of the International Geomagnetic Reference Field (IGRF) was adopted in December 2014 by the Working Group V-MOD appointed by the International Association of Geomagnetism and Aeronomy (IAGA) as discussed by the authors.

TL;DR: Numerical geodynamo models with studies of geostrophic motions in the Earth’s core that rely on geomagnetic data reconcile, finding a torsional wave recurring every six years from an ensemble inversion of core flow models.

TL;DR: In this article, the authors present a methodology to compute 3D global seismic wavefields for realistic earthquake sources in visco-elastic anisotropic media, covering applications across the observable seismic frequency band with moderate computational resources.

TL;DR: The International Geomagnetic Reference Field (IGRF) was adopted by the IGA Division V Working Group (V-MOD) in 2019 as discussed by the authors, which provides the equations defining the IGRF, the spherical harmonic coefficients for this thirteenth generation model, maps of magnetic declination, inclination, and total field intensity for the epoch 2020.0, and maps of their predicted rate of change for the 2020 to 2025.0 time period.

TL;DR: In this paper, a sequence of three convection-driven simulations in a rapidly rotating spherical shell is used to reach realistic turbulent regime in direct numerical simulations of the geodynamo.