Trans-polar vgp shifts and earth's rotation

Details Trans-polar vgp shifts and earth's rotation Trans-polar vgp shifts and earth's rotation

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gapfd..60..149m&link_type=abstract

Geophysical and Astrophysical Fluid Dynamics, vol. 60, Issue 1, pp.149-155

Physics

Fluid Dynamics

2

Trans-Polar Shifts, Secular Variations, Dipole Displacement, Earth'S Rotation, Sea Level, Dipole Strength

Scientific paper

At about 13,200 BP and 1000 BP, the geomagnetic field experienced trans-polar VGP shifts between main centra in Arctic Siberia and Arctic Canada, respectively. Both shifts are associated with major changes in the Earth's rate of rotation indicating a causal connection. The 1000 BP VGP shift and change in rotation is also associated with a decrease in the geomagnetic dipole field strength. The trans-polar VGP shifts seem to be of dipolar nature. They seem to be consistent with the displacement of the symmetry axis of two rotating bodies.

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