Irregularities in the secular variation and geodynamic implications; Proceedings of the Session, Cincinnati, OH, May 17, 1984

Details Irregularities in the secular variation and geodynamic implications; Proceedings of the Session, Cincinnati, OH, May 17, 1984 Irregularities in the secular variation and geodynamic implications; Proceedings of the Session, Cincinnati, OH, May 17, 1984

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pepi...39.....t&link_type=abstract

Session sponsored by the American Geophysical Union. Physics of the Earth and Planetary Interiors (ISSN 0031-9201), vol. 39, Sep

Physics

Geodynamics, Geomagnetism, Irregularities, Secular Variations, Annual Variations, Astronomical Models, Drift Rate, Earth Core, Earth Mantle, Earth Surface, Magnetic Dipoles, Magnetic Field Configurations, Magnetic Field Inversions, Magnetic Flux, Normal Density Functions, Solar Terrestrial Interactions, Vertical Distribution

Scientific paper

Consideration is given to: variations in the Gauss coefficients of the geomagnetic potential over the last several hundred years; eccentric geomagnetic dipole drift; and evidence for geomagnetic jerks from 1931 to 1971. Among other topics discussed are: models of the geomagnetic field in western Europe from 1960 to 1980; the external and internal parts of the geomagnetic jerk of 1970; secular variation of the magnetic mean energy density at the source layer depth; and motions at the core surface in the geostrophic approximation. Consideration is also given to: the unpredictability of geomagnetic secular variation; the use of short-term core-mantle coupling and geomagnetic variation impulses as Lagrangian tracers of core motions; and a comparison of two sequential geomagnetic polarity transitions in the upper Olduvai and the lower Jarmillio in the Southern Hemisphere.

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