Statistics of the geomagnetic dipole reversals based on paleomagnetic observations and simple geodynamo models

Data on geomagnetic field reversals in geological history make it possible to judge the mechanisms of geomagnetic field generation and sustention, including differential rotation, reflection-asymmetric convection, magnetic rotation instability, and other effects. To compare the magnetic polarity scale and the geodynamo theory, we consider a simple geodynamo model, which makes it possible to reproduce the polarity scale that resembles an actual scale and indicate how it is possible to reproduce the scale quantitative characteristics using the parameters that correspond to different geodynamo components. It turns out that we can perform this procedure using a rather simple dynamic system, which is obtained when we simplify the mean field electrodynamic equations, where statistical fluctuations of the geodynamo governing parameters are taken into account.