Longitudinally confined geomagnetic reversal paths from non-dipolar transition fields

Details Longitudinally confined geomagnetic reversal paths from non-dipolar transition fields Longitudinally confined geomagnetic reversal paths from non-dipolar transition fields

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993natur.362...51g&link_type=abstract

Nature (ISSN 0028-0836), vol. 362, no. 6415, p. 51-53.

Physics

33

Geomagnetism, Magnetic Field Configurations, Magnetic Poles, Paleomagnetism, Polar Wandering (Geology), Earth Core, Earth Mantle, Surface Temperature, Tectonics

Scientific paper

Recent paleomagnetic results suggesting that there are persistent preferred longitudinal paths for the virtual geomagnetic pole (VPG) during magnetic field reversals would provide the first direct evidence of the solid mantle influence on the core. A simple model is presented here that produces reversals with VGP paths confined within relatively narrow longitude bands despite the transition field having a substantially nondipolar structure. Thus, although longitude bias of the VGP paths is definitive evidence for core-mantle interaction, simple VGP paths are not evidence of near-dipolar transition fields.

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