Speculation about its possible super-rotation has drawn the attention of many geophysical
researchers to the Earth's inner core. An issue of special interest for geodynamo modelling …

More than half a century ago, Bullard suggested that the Earth's dynamo might be driven by
the motions created in the Earth's core by the luni-solar precession. The precessionally …

Observations from planetary spacecraft missions have demonstrated a spectrum of dynamo
behaviour in planets. From currently active dynamos, to remanent crustal fields from past …

Possible effects on the geodynamo of lateral variations in heat flux from the core are
explored using two different patterns of heat flow from the core. One is based on lower …

We present several numerical simulations of a self-consistent dynamo model in a rotating
spherical shell. The solutions have two different field configurations. Besides magnetic fields …

Numerical dynamo simulations by Glatzmaier and Roberts (1995) mark a breakthrough in
dynamo physics. Earlier computer simulations modeling the generation of magnetic field by …

The Earth's magnetic field is by and large a steady dipole, but its history has been
punctuated by intermittent excursions and reversals. This is at least superficially similar to …

Modelling chaotic and intermittent behaviour, namely the excursions and reversals of the
geomagnetic field, is a big problem far from being solved. Armbruster et al.[5] considered …

We present a variational optimization method that can identify the most efficient kinematic
dynamo in a sphere, where efficiency is based on the value of a magnetic Reynolds number …

The problem of non-linear planetary dynamos with a prescribed two-or three-dimensional,
time-dependent α is investigated using a finite element method. Magnetic fields are …