Abstract 80 years ago, Joseph Larmor planted the seed that grew into today's imposing body
of knowledge about how the Earth's magnetic field is created. His simple idea, that the …

Earth's magnetic field is generated by fluid motion in the liquid iron core. Details of how this
occurs are now emerging from numerical simulations that achieve a self-sustaining …

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, buoyancy …

Numerical calculations of fluid dynamos powered by thermal convection in a rotating,
electrically conducting spherical shell are analyzed. We find two regimes of nonreversing …

The near-Earth magnetic field is caused by sources in the Earth's core, ionosphere,
magnetosphere, lithosphere and from coupling currents between the ionosphere and the …

A fully three‐dimensional solution of the magneto‐convection equations—the nonlinearly
coupled momentum, induction and temperature equations—is presented in spherical …

There has been significant progress in the development of numerical geodynamo models
over the last five years. Advances in computer technology have made it possible to perform …

Dynamo action in the Earth's outer core is expected to be controlled by a balance between
pressure, Coriolis, buoyancy and Lorentz forces, with marginal contributions from inertia and …

▪ Abstract The past seven years have seen significant advances in computational
simulations of convection and magnetic field generation in the Earth's core. Although …

The geodynamo features a broad separation between the large scale at which Earth's
magnetic field is sustained against ohmic dissipation and the small scales of the turbulent …