Simulations of a Quasi–Taylor State Geomagnetic Field Including Polarity Reversals on the Earth Simulator

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Science  15 Jul 2005:
Vol. 309, Issue 5733, pp. 459-461
DOI: 10.1126/science.1111831

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High-resolution, low-viscosity geodynamo simulations have been carried out on the Earth Simulator, one of the fastest supercomputers, in a dynamic regime similar to that of Earth's core, that is, in a quasi–Taylor state. Our dynamo models exhibit features of the geodynamo not only in spatial and temporal characteristics but also in dynamics. Polarity reversals occurred when magnetic flux patches at high latitudes moved poleward and disappeared; patches with reversed field at low and mid-latitudes then moved poleward.

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