Enthalpy benchmark experiments for numerical ice sheet models
نویسندگان
چکیده
منابع مشابه
Some basic experiments with a vertically-integrated ice sheet model
A simple If-dimensional continental ice sheet model is presented. The model is based on Nye’s (1959) proposal to express the vertical mean horizontal ice-velocity as u = BC, where r, is the basal shear stress and B and m are constants. Essentially, the spread of ice is governed by a nonlinear diffusion equation for the ice thickness. The diffusivity increases with both ice thickness and surface...
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Grounding line migration is a key process affecting the stability of marine ice sheets such as the West Antarctic ice sheet (WAIS). Grounding line motion is often included in numerical models simulating the past and future evolution of the WAIS; however, little attention has been paid to the numerical consistency of these models. The aim of this paper is to assess the ability of simple versions...
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Geophysical ice-sheet models are used to predict future ice-sheet dimensions and, in turn, these projections help estimate the magnitude of eustatic sea-level rise. Before models can confidently predict icesheet behavior, they must be validated by being able to duplicate the geological record of ice-sheet change. Here, we review geological records of Greenland Ice Sheet (GrIS) change, with emph...
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متن کاملIce-sheet surging and ice-strealll forlllation
A simplified model of ice-sheet behayiour is described. I t combines the assumptions of rapid ice flow, high viscous actiyation energy and realistic sediment-based sliding dynamics to form a non-linear diffusion-type equation which can display relaxation oscillations analogous to those of surging glaciers, and which may be relevant to large-scale surges of the Hudson Strait and Cabot Strait ice...
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ژورنال
عنوان ژورنال: The Cryosphere
سال: 2015
ISSN: 1994-0424
DOI: 10.5194/tc-9-217-2015