D.D.Sokoloff, G.S.Sobko, V.I.Trukhin, V.N.Zadkov, A model for Grand minima and geomagnetic reversals, In: Comparative Magnetic Minima: Characterizing quiet times in the Sun and stars, IAU Symp. 286, eds. C.H.Mandrini, D.W.Webb, 2012, 360 - 366 .
We suggest a simple dynamical system which mimics a nonlinear dynamo which is able to provide (in specific domains of its parametric space) the temporal evolution of solar magnetic activity cycles as well as evolution of geomagnetic field including its polarity reversals. A qualitative explanation for the physical nature of both phenomena is presented and discussed.
Earth; magnetic fields; sunspots