Title: A Parallel Computational Model for 3D Thermo-Mechanical Stokes Flow Simulations of Ice Sheets

Abstract:

In this talk we focuses on the development of an efficient, three-dimensional, thermo-mechanically coupled, nonlinear Stokes flow computational model for ice sheet simulation. The model features stable and high-order accurate discretizations on variable resolution grids. In particular, we employ a locally mass-conserved finite element approximation for the Stokes problem,an efficient iterative solution method for treating the viscosity non-linearity, an accurate finite element solver for the temperature equation, and a conservative finite volume solver for handling change of ice thickness. We demonstrate efficiency and physical reliability of the Stokes model using various numerical tests on manufactured solutions, benchmark experiments and the realistic Greenland ice-sheet.