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The Cryosphere An interactive open-access journal of the European Geosciences Union
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Volume 12, issue 8
The Cryosphere, 12, 2545–2568, 2018
https://doi.org/10.5194/tc-12-2545-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
The Cryosphere, 12, 2545–2568, 2018
https://doi.org/10.5194/tc-12-2545-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 13 Aug 2018

Research article | 13 Aug 2018

The role of subtemperate slip in thermally driven ice stream margin migration

Marianne Haseloff et al.
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Cited articles  
Aschwanden, A., Bueler, E., Khroulev, C., and Blatter, H.: An enthalpy formulation for glaciers and ice sheets, J. Glaciol., 58, 441–457, https://doi.org/10.3189/2012JoG11J088, 2012.
Bamber, J. L., Vaughan, D. G., and Joughin, I.: Widespread Complex Flow in the Interior of the Antarctic Ice Sheet, Science, 287, 1248–1250, https://doi.org/10.1126/science.287.5456.1248, 2000.
Bentley, C. R., Lord, N., and Liu, C.: Radar reflections reveal a wet bed beneath stagnant Ice Stream C and a frozen bed beneath ridge BC, West Antarctica, J. Glaciol., 44, 149–156, https://doi.org/10.3189/S0022143000002434, 1998.
Bindschadler, R., Chen, X., and Vornberger, P.: The onset area of Ice Stream D, West Antarctica, J. Glaciol., 46, 95–101, https://doi.org/10.3189/172756500781833377, 2000.
Blatter, H.: Velocity and stress fields in grounded glaciers: a simple algorithm for including deviatoric stress gradients, J. Glaciol., 41, 333–344, https://doi.org/10.3189/S002214300001621X, 1995.
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The widths of the Siple Coast ice streams evolve on decadal to centennial timescales. We investigate how the rate of thermally driven ice stream widening depends on heat dissipation in the ice stream margin and at the bed, and on the inflow of cold ice from the ice ridge. As determining the migration rate requires resolving heat transfer processes on very small scales, we derive a parametrization of the migration rate in terms of parameters that are available from large-scale model outputs.
The widths of the Siple Coast ice streams evolve on decadal to centennial timescales. We...
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