The effect of bottom boundary conditions in the ice-sheet to ice-shelf transition zone problem

Author: Wilchinsky, Alexander V.

Source: Journal of Glaciology, Volume 53, Number 182, July 2007 , pp. 363-367(5)

Publisher: International Glaciological Society

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Abstract:

Uniqueness of the transition zone solution is discussed. It is argued that when it is assumed that the stresses are continuous at the grounding line, the ice-shelf solution at the grounding line should possess a zero slope. In order to avoid issues caused by the mathematical singularity of the solution, the same technique as that used to study the transition zone is applied to a similar problem of lifting an elastic sheet from a rigid substrate, which allows a better physical understanding. This exemplifies the effect of the bottom boundary condition of no vertical motion imposed up to a fixed grounding line position, while the forcing parameters, such as the flow rate, vary. Its effect is to produce multiple solutions due to suppression of the separation mechanism.

Document Type: Research Article

DOI: http://dx.doi.org/10.3189/002214307783258477

Publication date: July 1, 2007

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  • The Journal of Glaciology is published six times per year. It accepts submissions from any discipline related to the study of snow and ice. All articles are peer reviewed. The Journal is included in the ISI Science Citation Index.
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