Seismic‐geodynamic determination of the origin of excess ellipticity of the core‐mantle boundary

Alessandro M. Forte; Jerry X. Mitrovica; Robert L. Woodward

doi:10.1029/95GL01065

Seismic‐geodynamic determination of the origin of excess ellipticity of the core‐mantle boundary

Alessandro M. Forte
, Jerry X. Mitrovica
, Robert L. Woodward

Université Paris Diderot
Department of Physics
University of Toronto
Albuquerque Seismological Lab
U.S.G.S

Research output: Contribution to journal › Article › peer-review

47 Citations (Scopus)

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 generated by mantle convective flow. The 3D elastic structure and radial viscosity profile which define the model used in the viscous flow calculations are constrained to simultaneously reconcile a large set of seismic and geodynamic data.

Original language	English
Pages (from-to)	1013-1016
Number of pages	4
Journal	Geophysical Research Letters
Volume	22
Issue number	9
DOIs	https://doi.org/10.1029/95GL01065
Publication status	Published - 1 Jan 1995
Externally published	Yes

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title = "Seismic‐geodynamic determination of the origin of excess ellipticity of the core‐mantle boundary",

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 generated by mantle convective flow. The 3D elastic structure and radial viscosity profile which define the model used in the viscous flow calculations are constrained to simultaneously reconcile a large set of seismic and geodynamic data.",

author = "Forte, \{Alessandro M.\} and Mitrovica, \{Jerry X.\} and Woodward, \{Robert L.\}",

year = "1995",

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AU - Forte, Alessandro M.

AU - Mitrovica, Jerry X.

AU - Woodward, Robert L.

PY - 1995/1/1

Y1 - 1995/1/1

N2 - 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 generated by mantle convective flow. The 3D elastic structure and radial viscosity profile which define the model used in the viscous flow calculations are constrained to simultaneously reconcile a large set of seismic and geodynamic data.

AB - 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 generated by mantle convective flow. The 3D elastic structure and radial viscosity profile which define the model used in the viscous flow calculations are constrained to simultaneously reconcile a large set of seismic and geodynamic data.

UR - https://www.scopus.com/pages/publications/0028848775

U2 - 10.1029/95GL01065

DO - 10.1029/95GL01065

M3 - Article

AN - SCOPUS:0028848775

SN - 0094-8276

VL - 22

SP - 1013

EP - 1016

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 9

ER -

Seismic‐geodynamic determination of the origin of excess ellipticity of the core‐mantle boundary

Abstract

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