Geoscientific Model Development
Geoscientific Model Development
GMD
Articles | Volume 8, issue 5
Articles | Volume 8, issue 5
https://doi.org/10.5194/gmd-8-1275-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/gmd-8-1275-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 8, issue 5
Methods for assessment of models
 | 
04 May 2015
Methods for assessment of models |  | 04 May 2015

A stabilized finite element method for calculating balance velocities in ice sheets

D. Brinkerhoff and J. Johnson

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Short summary
We present a novel numerical method for computing velocity fields in ice sheets using the principle of mass conservation, and show that, for suitable smoothing of flow directions, the velocity converges to a unique solution under grid refinement. We use this method as the forward model in a constrained optimization problem, and use these so-called balance velocities to seamlessly fill in gaps between satellite-based velocity observations.
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