Operator-Splitting Methods Respecting Eigenvalue Problems For Shallow Shelf Equations With Basal Drag

Jürgen Geiser, Reinhard Calov & Thomas Recknagel
We discuss different numerical methods for solving the shallow shelf equations with basal drag. The coupled equations are decomposed into operators for membranes stresses, basal shear stress and driving stress. Applying reasonable parameter values, we demonstrate that the operator of the membrane stresses is much stiffer than operator of the basal shear stress. Therefore, we propose a new splitting method, which alternates between the iteration on the membrane-stress operator and the basal-shear operator, with a...
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