Can heterogeneous core-mantle electromagnetic coupling control geomagnetic reversals?

Details Can heterogeneous core-mantle electromagnetic coupling control geomagnetic reversals? Can heterogeneous core-mantle electromagnetic coupling control geomagnetic reversals?

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pepi..112..159b&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 112, Issue 3-4, p. 159-170.

Physics

11

Scientific paper

An analytical model is developed for the electromagnetic torques exerted on the mantle by the poloidal magnetic field of the core interacting with a laterally heterogeneous conducting layer at the base of the mantle. Torques due to changes in both orientation and intensity of a dipolar poloidal field are included. Contrary to earlier suggestions, our calculations predict that the trajectory of the magnetic pole during a polarity reversal is not strongly affected by heterogeneity in mantle electrical conductivity.

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