The Rotation of a Non-Rigid, Non-Symmetrical Earth II: Free Nutations and Dissipative Effects.

Autor: Getino, Juan, González, Ana, Escapa, Alberto
Zdroj: Celestial Mechanics & Dynamical Astronomy; Jan2000, Vol. 76 Issue 1, p1-21, 21p
Abstrakt: The study of the rotation of a non-rigid, non-symmetrical Earth with a heterogeneous and stratified liquid core was recently accomplished by González and Getino (1997) through the Hamiltonian formalism. In this work that model is extended by including the effect of the dissipation arising from the mantle–core interaction due to the viscous and electromagnetic coupling. A canonical transformation to a new set of non-singular variables is performed, in order to avoid small divisors in the system of equations. Numerical estimations of the effect of the dissipation are given in form of tables and graphics, and the significance of this effect is discussed. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index