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Capabilities and limitations of numerical ice sheet models: a discussion for Earth-scientists and modelers
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
Swiss Federal Institute of Technology.
Stockholm University, Faculty of Science, Department of Geological Sciences. (Marin geologi)
Stockholm University, Faculty of Science, Department of Geological Sciences. (Marin geologi)
2011 (English)In: Quaternary Science Reviews, ISSN 0277-3791, Vol. 30, no 25-26, 3691-3704 p.Article in journal (Refereed) Published
Abstract [en]

The simulation of dynamically coupled ice sheet, ice stream, and ice shelf-systems poses a challenge to most numerical ice sheet models. Here we review present ice sheet model limitations targeting a broader audience within Earth Sciences, also those with no specific background in numerical modeling, in order to facilitate cross-disciplinary communication between especially paleoglaciologists, marine and terrestrial geologists, and numerical modelers. The ‘zero order’(Shallow Ice Approximation, SIA)-,‘higher order’-, and‘full Stokes’ice sheet models are described conceptually and complemented by an outline of their derivations. We demonstrate that higher order models are required to simulate coupled ice sheetice shelf and ice sheet-ice stream systems, in particular if the results are aimed to complement spatial ice flow reconstructions based on higher resolution geological and geophysical data. The zero order SIA model limitations in capturing ice stream behavior are here illustrated by conceptual simulations of a glaciation on Svalbard. The limitations are obvious from the equations comprising a zero order model. However, under certain circumstances, simulation results may falsely give the impression that ice streams indeed are simulated with a zero order SIA model.

Place, publisher, year, edition, pages
Elsevier, 2011. Vol. 30, no 25-26, 3691-3704 p.
Keyword [en]
ice sheet, ice stream, ice shelves, ice sheet modeling
National Category
Geophysics Geosciences, Multidisciplinary Geology Physical Geography
Research subject
Physical Geography; Marine Geoscience
Identifiers
URN: urn:nbn:se:su:diva-67084DOI: 10.1016/j.quascirev.2011.09.012ISI: 000298204000010OAI: oai:DiVA.org:su-67084DiVA: diva2:469494
Funder
Swedish Research Council, 1290009
Available from: 2011-12-27 Created: 2011-12-26 Last updated: 2012-01-29Bibliographically approved

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Kirchner, N.Jakobsson, MartinGyllencreutz, Richard
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