Slow periodic modulation of the alpha-effect in a low-dimensional thermally driven geodynamo model creates a multi-peaked distribution of magnetic polarity persistence times at integer multiples of the modulation timescale.
We also report residence-time asymmetry, defined as the fraction of samples with b1(t) > 0 versus b1(t) < 0, as an independent diagnostic of a possible preference for polarity
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Stochastic Resonance in a Thermally Driven Low-Dimensional Geodynamo Model
Slow periodic modulation of the alpha-effect in a low-dimensional thermally driven geodynamo model creates a multi-peaked distribution of magnetic polarity persistence times at integer multiples of the modulation timescale.