Time-dependent electromagnetic core-mantle coupling

Details Time-dependent electromagnetic core-mantle coupling Time-dependent electromagnetic core-mantle coupling

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pepi...36...49s&link_type=abstract

(International Association of Geomagnetism and Aeronomy, Symposium on Origin of Main Fields and Secular Changes of the Earth and

Physics

54

Earth Core, Earth Mantle, Electromagnetic Coupling, Electromagnetic Fields, Geomagnetism, Approximation, Electrical Resistivity, Time Dependence, Toroids, Torque

Scientific paper

The magnetic field in the earth's mantle is parameterized according to depth measurements dependent of electrical conductivity and an approximation scheme in which the electromagnetic time constant of the mantle is assumed to be small compared to the time scales of the secular variation. Induced currents and fields in the approximation are obtained iteratively, and the results are given in a table. Some of the important differences between the derived parameters and other theoretical models of the magnetic field of the mantle are discussed in detail.

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