Some recent developments in geodynamo theory

Details Some recent developments in geodynamo theory Some recent developments in geodynamo theory

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phflb...2.1446b&link_type=abstract

(APS Division of Plasma Physics, Annual Meeting, 31st, Anaheim, CA, Nov. 13-17, 1989) Physics of Fluids B (ISSN 0899-8221), vol.

Physics

Plasma Physics

4

Dynamo Theory, Earth Core, Earth Mantle, Geomagnetism, Boussinesq Approximation, Coriolis Effect, Reynolds Number

Scientific paper

A geodynamo of model-Z type is presented. A characteristic feature of such a model is that, even if core-mantle coupling is weak, it has a significant effect. A nonstationary solution was obtained in which the axial dipole strength varies periodically. By comparing the period of this oscillation with the archeomagnetically observed period, the electrical conductivity of the earth's core was estimated.

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