Geophysical nutation model

Details Geophysical nutation model Geophysical nutation model

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..604d&link_type=abstract

In: Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 J

Astronomy and Astrophysics

Astronomy

Nutation

Scientific paper

The nutation model that has been adopted by the IAU in 2000 is the semi-analytical model MHB2000 of Mathews et al. (JGR 107(B4) 10.1028/2001JB000390). We show how robust this model is and examine the information about the interior of the Earth that has been derived. The observations used to derived the parameters of MHB2000 as well as the amplitude of the Earth Free Core Nutation (FCN) are examined in terms of their stability and precision. We examine in parallel the possibilities that are provided by a numerical integration model. Additional contributions from the external geophysical fluids (atmosphere ocean) are also studied. The extension of this model to short-term polar motion induced by the lunisolar forcing is examined as well. The conclusions of the WG related to that work is given.

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