Grounding line treatments

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This presentation aims at providing a wide overview of grounding line treatments and the concept of marine ice sheet instability. Not all existing methods will be covered, the focus is on 2-D treatment of marine ice sheet that flow into unconfined ice shelves (Ie: ignore the topic of back pressure). A word of warning: new work on grounding line migration appear regularly, so keep your eyes open…

Required reading:

Vieli, A. and A. Payne (2005). Assessing the ability of numerical ice sheet models to simulate grounding line migration. Journal of Geophysical Research 110, F01003.

Schoof, C. (2007). Ice sheet grounding line dynamics: Steady states, stability, and hysteresis. Journal of Geophysical Research 112, F03528. pdf

Some references:

Barcilon,V., MacAyeal, D.R., (1993). Steady flow of a viscous ice stream across a no-slip/free-slip transition at the bed. J. Glaciol. 39 (131), 167–185. [pdf][1]

Chugunov, V.A., Wilchinsky, A.V., (1996). Modelling of a marine glacier and ice-sheet-ice-shelf transition zone based on asymptotic analysis. Ann. Glaciol. 23, 59–67.

Durand, G., O. Gagliardini, T. Zwinger and E. Le Meur (2009). Full-Stokes modeling of marine ice-sheets: influence of the grid size, Annals of Glaciology.

Hindmarsh, R. (1993). Qualitative dynamics of marine ice sheets. In W. Peltier (Ed.), Ice in the Climate System, Volume I 12, pp. 67–199. NATO ASI Series, Springer-Verlag Berlin Heidelberg.

Lestringant, R., (1994). A two-dimensional finite element study of flow in the transition zone between an ice sheet and an ice shelf. Ann. Glaciol. 20, 67–72.

Nowicki S. M. J., D. J. Wingham (2008). Conditions for a steady ice sheet – ice shelf junction, Earth and Planetary Science Letters, doi 10.1016/j.epsl.2007.10.018

Pollard D., R. M. DeConto (2009). Modelling West Antarctic ice sheet growth and collapse through the past five million years, Nature, doi 0.1037/nature07809