275 citations · 749 across the 14 of their papers we have counts for
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Geomagnetic semblance and dipolar-multipolar transition in top-heavy double-diffusive geodynamo models
Théo Tassin, Thomas Gastine, Alexandre Fournier
Convection in the liquid outer core of the Earth is driven by thermal and chemical perturbations. The main purpose of this study is to examine the impact of double-diffusive convec…
Dynamo-based limit to the extent of a stable layer atop Earth's core
Thomas Gastine, Julien Aubert, Alexandre Fournier
The existence of a stably stratified layer underneath the core-mantle boundary (CMB) has been recently revived by corroborating evidences coming from seismic studies, mineral physi…
Turbulent geodynamo simulations: a leap towards Earth's core
Nathanaël Schaeffer, Dominique Jault, Henri-Claude Nataf +1
We present an attempt to reach realistic turbulent regime in direct numerical simulations of the geodynamo. We rely on a sequence of three convection-driven simulations in a rapidl…
Spherical convective dynamos in the rapidly rotating asymptotic regime
Julien Aubert, Thomas Gastine, Alexandre Fournier
Self-sustained convective dynamos in planetary systems operate in an asymptotic regime of rapid rotation, where a balance is thought to hold between the Coriolis, pressure, buoyanc…
Hydromagnetic quasi-geostrophic modes in rapidly rotating planetary cores
Elisabeth Canet, Chris Finlay, Alexandre Fournier
The core of a terrestrial-type planet consists of a spherical shell of rapidly rotating, electrically conducting, fluid. Such a body supports two distinct classes of quasi-geostrop…
Forward and adjoint quasi-geostrophic models of the geomagnetic secular variation
Elisabeth Canet, Alexandre Fournier, Dominique Jault
We introduce a quasi-geostrophic model of core dynamics, which aims at describing core processes on geomagnetic secular variation timescales. It extends the formalism of Alfvén tor…
Spherical Couette flow in a dipolar magnetic field
Rainer Hollerbach, Elisabeth Canet, Alexandre Fournier
We consider numerically the flow of an electrically conducting fluid in a differentially rotating spherical shell, in a dipolar magnetic field. For infinitesimal differential rotat…