Convection and anisotropy of the inner core

Details Convection and anisotropy of the inner core Convection and anisotropy of the inner core

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988georl..15...72j&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 15, Jan. 1988, p. 72-75. NSF-supported research.

Mathematics

Logic

83

Anisotropy, Convection Currents, Earth Core, Flow Distribution, Close Packed Lattices, Hexagonal Cells, Iron, Rayleigh Number, Titanium

Scientific paper

Estimation of the Rayleigh number of the Earth's inner core suggests that this region is convecting. The flow pattern is likely to produce crystallographic preferred orientation of the elastically anisotropic hexagonal closest packed (ɛ) phase of iron, such that compressional-wave velocities would be greater in the axial relative to the equatorial direction by roughly 1 percent. This result is in agreement with seismological evidence that the inner core is elastically anisotropic.

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