Parameterization for subgrid-scale motion of ice-shelf calving fronts

T. Albrecht; M. Martin; Marianne Haseloff; R. Winkelmann; A. Levermann

doi:10.5194/tc-5-35-2011

Parameterization for subgrid-scale motion of ice-shelf calving fronts

T. Albrecht, M. Martin, Marianne Haseloff, R. Winkelmann, A. Levermann^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

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Abstract

A parameterization for the motion of ice-shelf fronts on a Cartesian grid in finite-difference land-ice models is presented. The scheme prevents artificial thinning of the ice shelf at its edge, which occurs due to the finite resolution of the model. The intuitive numerical implementation diminishes numerical dispersion at the ice front and enables the application of physical boundary conditions to improve the calculation of stress and velocity fields throughout the ice-sheet-shelf system. Numerical properties of this subgrid modification are assessed in the Potsdam Parallel Ice Sheet Model (PISM-PIK) for different geometries in one and two horizontal dimensions and are verified against an analytical solution in a flow-line setup.

Original language	English
Pages (from-to)	35-44
Number of pages	10
Journal	Cryosphere
Volume	5
Issue number	1
DOIs	https://doi.org/10.5194/tc-5-35-2011
Publication status	Published - 19 Jan 2011
Externally published	Yes

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AU - Albrecht, T.

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AU - Levermann, A.

PY - 2011/1/19

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N2 - A parameterization for the motion of ice-shelf fronts on a Cartesian grid in finite-difference land-ice models is presented. The scheme prevents artificial thinning of the ice shelf at its edge, which occurs due to the finite resolution of the model. The intuitive numerical implementation diminishes numerical dispersion at the ice front and enables the application of physical boundary conditions to improve the calculation of stress and velocity fields throughout the ice-sheet-shelf system. Numerical properties of this subgrid modification are assessed in the Potsdam Parallel Ice Sheet Model (PISM-PIK) for different geometries in one and two horizontal dimensions and are verified against an analytical solution in a flow-line setup.

AB - A parameterization for the motion of ice-shelf fronts on a Cartesian grid in finite-difference land-ice models is presented. The scheme prevents artificial thinning of the ice shelf at its edge, which occurs due to the finite resolution of the model. The intuitive numerical implementation diminishes numerical dispersion at the ice front and enables the application of physical boundary conditions to improve the calculation of stress and velocity fields throughout the ice-sheet-shelf system. Numerical properties of this subgrid modification are assessed in the Potsdam Parallel Ice Sheet Model (PISM-PIK) for different geometries in one and two horizontal dimensions and are verified against an analytical solution in a flow-line setup.

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Parameterization for subgrid-scale motion of ice-shelf calving fronts

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