A new theory has been formulated to link the conditions of current numerical geodynamo models to those of the geodynamo. A theoretical ‘path’ in parameter space is described between the two sets of conditions, and explored up to its half using approximated numerical simulations. This new generation of numerical geodynamo models enters a regime close to Earth’s core conditions that was previously out of numerical reach.
Aubert, J., Gastine, T., and Fournier, A.: Spherical convective dynamos in the rapidly rotating asymptotic regime, J. Fluid. Mech. 813, 558-593, 2017, doi: 10.1017/jfm.2016.789