SEISMIC-GEODYNAMIC DETERMINATION OF THE ORIGIN OF EXCESS ELLIPTICITY OF THE CORE-MANTLE BOUNDARY

Authors
FORTE AM MITROVICA JX WOODWARD RL
Citation
Am. Forte et al., SEISMIC-GEODYNAMIC DETERMINATION OF THE ORIGIN OF EXCESS ELLIPTICITY OF THE CORE-MANTLE BOUNDARY, Geophysical research letters, 22(9), 1995, pp. 1013-1016
Citations number
25
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
Geophysical research letters → ACNP
ISSN journal
00948276
Volume
22
Issue
9
Year of publication
1995
Pages
1013 - 1016
Database
ISI
SICI code
0094-8276(1995)22:9<1013:SDOTOO>2.0.ZU;2-1
Abstract
We demonstrate that the excess dynamic ellipticity of the core-mantle- boundary (CMB) inferred from the period of the Earth's retrograde free core nutation (RFCN) may be explained in terms of viscous stresses ge nerated by mantle convective flow. The 3D elastic structure and radial viscosity profile which define the model used in the viscous flow cal culations are;constrained to simultaneously reconcile a large set of s eismic and geodynamic data.