Physics
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mgeo...17..186m&link_type=abstract
Manuscr. Geod., Vol. 17, No. 3, p. 186 - 200
Physics
Scientific paper
The relationship between applied surface stresses and induced displacements depends generally on many factors. Taking into account a materially simple model of the Earth the author has investigated the role of the irregularly shaped Earth's topography in this relation. The response function of the model was quantitatively parametrized in terms of the Love numbers. While the Love numbers for a spherically symmetric model are degenerated, i.e. spheroidal/toroidal forces only induce spheroidal/toroidal displacements without any coupling between them, the Earth's topography couples the particular modes and non-zero mixed Love numbers appear. Numerically, the third and higher digits of the Love numbers are influenced by the low-degree harmonics of the Earth's topography surface. This means that if an accuracy of 0.1% or better should be achieved, the Earth's surface ought to be modelled by a more realistic surface than by a sphere or by a rotational ellipsoid.
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