REMARKS ON DYNAMICAL ELLIPTICITY AT THE EARTHS CORE-MANTLE BOUNDARY

In this paper, two factors - the redistribution of the density and the variation in the angular velocity of the Earth rotation, that affect the adopted value of the flattening for equidensity surface within the Earth, are discussed. The computational results show that the contrib ution of the redistribution of the density in the Earth interior (espe cially in the core) on the change of the flattening at the core-mantle boundary (CMB) is marginal, and that the calculated value of the flat tening at the CMB can be in good agreement with the VLBI observed valu e so long as the fact that the angular velocity of the Earth rotation has undergone the tidal evolution is taken into account. As a result, this paper presents a set of recommended values of the dynamical param eters of the Earth (see Table III) for computing Earth's forced nutati on series.