A Simple Theory on the Dynamical Effects of a Stratified Fluid Core Upon Nutational Motion of the Earth

• DOI: 10.1017/s0074180900032009
• Publication Date: 2019-06-07T23:26:05Z
• Authors: Tetsuo Sasao; Shuhei Okubo; Masanori Saito
• Keywords: Outer core

The theory of Molodensky (1961) on dynamical effects a stratified fluid outer core upon nutations and diurnal Earth tides is reconstructed new probably much simpler ground. A equivalent to Molodensky's well represented the basis two linear equations for angular-momentum balance whole core, which differ from well-known Poincaré (1910) only in existence products inertia due deformations core. are characterized by four parameters easily computed every model usual tide equations. reciprocity relation exists between parameters. Adams-Wiliamson condition not necessary premise theory. Amplitudes tidal gravity factors three models. dissipative core-mantle coupling introduced into qualitatively. resulting expressed same form as those Sasao, Okamoto Sakai (1977). Formulae secular changes Earth-Moon system friction derived evidences internal consistency