3 papers
astro-ph.EP2026
Motional induction in Ganymede's ocean
Simon Cabanes, Thomas Gastine, Alexandre Fournier
We investigate the magnetic signature of oceanic circulation in Ganymede's subsurface ocean using kinematic induction modeling. Our approach couples zonal jet flows from rotating t…
physics.flu-dyn2025
Online learning of subgrid-scale models for quasi-geostrophic turbulence in planetary interiors
Hugo Frezat, Thomas Gastine, Alexandre Fournier
Machine learning approaches to subgrid-scale (SGS) modelling are now well established in atmospheric and oceanic applications. Among these, online end-to-end learning, where the di…
physics.geo-ph2025
Core-surface kinematic control of polarity reversals in advanced geodynamo simulations
Julien Aubert, Maylis Landeau, Alexandre Fournier +1
The geomagnetic field has undergone hundreds of polarity reversals over Earth's history, at a variable pace. In numerical models of Earth's core dynamics, reversals occur with incr…