The Cryosphere
The Cryosphere
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Articles | Volume 12, issue 3
Articles | Volume 12, issue 3
https://doi.org/10.5194/tc-12-1047-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/tc-12-1047-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 12, issue 3
Research article
 | 
23 Mar 2018
Research article |  | 23 Mar 2018

Implementing an empirical scalar constitutive relation for ice with flow-induced polycrystalline anisotropy in large-scale ice sheet models

Felicity S. Graham, Mathieu Morlighem, Roland C. Warner, and Adam Treverrow

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Short summary
Ice sheet flow is anisotropic, depending on the nature of the stress applied. However, most large-scale ice sheet models rely on the Glen flow relation, which ignores anisotropic effects. We implement a flow relation (ESTAR) for anisotropic ice in a large-scale ice sheet model. In ice shelf simulations, the Glen flow relation overestimates velocities by up to 17 % compared with ESTAR. Our results have implications for ice sheet model simulations of paleo-ice extent and sea level rise prediction.
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