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physics.geo-ph2025
Asymptotics of spherical dynamos exhibiting a small-scale MAC balance
Justin A. Nicoski, Andy Esseln, Chris Davies +1
Understanding the asymptotic behaviour of numerical dynamo models is critical for extrapolating results to the physical conditions that characterise terrestrial planetary cores. He…
physics.geo-ph2025
Accessing the dipole-multipole transition in rapidly rotating spherical shell dynamos
Andrew T. Clarke, Christopher J. Davies, Souvik Naskar +1
Polarity reversals are a key feature of Earth's magnetic field, yet the processes governing them are still poorly understood. Dipole reversals have been found in many numerical dyn…
physics.geo-ph2025
Local Flow Estimation at the top of the Earth's Core using Physics Informed Neural Networks
Naomi Shakespeare-Rees, Philip W. Livermore, Christopher J. Davies +4
The Earth's main geomagnetic field arises from the constant motion of the fluid outer core. By assuming that the field changes are advection-dominated, the fluid motion at the core…