Generation planetary magnetism by convection

Details Generation planetary magnetism by convection Generation planetary magnetism by convection

Sep 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976pepi...12..350b&link_type=abstract

Physics of the Earth and Planetary Interiors, vol. 12, no. 4, Sept. 1976, p. 350-358.

Physics

57

Convective Flow, Dynamo Theory, Mathematical Models, Planetary Magnetic Fields, Planetary Structure, Conducting Fluids, Earth (Planet), Electric Conductors, Jupiter (Planet), Mercury (Planet), Planetology

Scientific paper

Reliable measurements of the magnetic fields of Jupiter and Mercury have been obtained recently. Convection appears to be the most probable origin of Jovian and Hermaean magnetism as well as of geomagnetism. The similarity of the dynamo mechanism in the electrically conducting core of these planets offers opportunities for comparing different hypotheses and testing theoretical models. It is proposed in this paper that the realized magnetic field reaches a maximum amplitude in accordance with the dynamical constraints of nearly geostrophic motion and the condition for dynamo action.

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