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Christensen et al. 1998
Christensen, U., Olson, P. and Glatzmaier, G.A. (1998). A dynamo model interpretation of geomagnetic field structures. Geophysical Research Letters 25: doi: 10.1029/98GL00911. issn: 0094-8276.
We present numerical dynamo models which qualitatively reproduce some structural characteristics of the present-day geomagnetic field. Time-dependent convection in an electrically conducting, rotating spherical shell at Ekman numbers 1-3¿10-4 generates dipole-dominated magnetic fields, which exhibit distinct bundles of strong radial flux at high latitudes, low flux over the poles, and paired spots of reversed flux near the equator, suggestive of the geomagnetic field pattern at the core-mantle boundary. In our model these structures result from high magnetic Reynolds number, helical convection in columns parallel to the spin axis and rising plumes near the poles. ¿ 1998 American Geophysical Union We present numerical dynamo models which qualitatively reproduce some structural characteristics of the present-day geomagnetic field. Time-dependent convection in an electrically conducting, rotating spherical shell at Ekman numbers 1-3¿10-4 generates dipole-dominated magnetic fields, which exhibit distinct bundles of strong radial flux at high latitudes, low flux over the poles, and paired spots of reversed flux near the equator, suggestive of the geomagnetic field pattern at the core-mantle boundary. In our model these structures result from high magnetic Reynolds number, helical convection in columns parallel to the spin axis and rising plumes near the poles. ¿ 1998 American Geophysical Union
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Abstract

Numerical Model

Keywords
Geomagnetism and Paleomagnetism, Dynamo theories, Geomagnetism and Paleomagnetism, Geomagnetic induction, Mathematical Geophysics, Modeling
Journal
Geophysical Research Letters
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Publisher
American Geophysical Union
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