Variational approach to modeling present-time mantle convection

Ondrej Cadek & Ctirad Matyska

Summary

An analogy of the Hellinger-Reissner functional for the Stokes problem is constructed and the way of determining its minimum by means of spherical harmonic vectors and tensors is described. The variational method is applied to a Newtonian mantle in which the body forces were estimated on the basis of global inversion of gravitational and topographic data. The method is then generalized to the case of a realistic rheology (power-law creep), and prospects of the generalised method are briefly discussed.


Studia geophys. et geod., 36 (1992), 215-229.