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| Titel |
Capabilities and performance of Elmer/Ice, a new-generation ice sheet model |
| VerfasserIn |
O. Gagliardini, T. Zwinger, F. Gillet-Chaulet, G. Durand, L. Favier, B. Fleurian, R. Greve, M. Malinen, C. Martin, P. Råback, J. Ruokolainen, M. Sacchettini, M. Schäfer, H. Seddik, J. Thies |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 6, no. 4 ; Nr. 6, no. 4 (2013-08-22), S.1299-1318 |
| Datensatznummer |
250084978
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| Publikation (Nr.) |
 copernicus.org/gmd-6-1299-2013.pdf |
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| Zusammenfassung |
| The Fourth IPCC Assessment Report concluded that ice sheet flow
models, in their current state, were unable to provide accurate
forecast for the increase of polar ice sheet discharge and the associated contribution to sea level
rise. Since then, the glaciological community has undertaken a huge
effort to develop and improve a new generation of ice flow models,
and as a result a significant number of new ice sheet models have
emerged. Among them is the parallel finite-element model Elmer/Ice,
based on the open-source multi-physics code Elmer. It was one of the
first full-Stokes models used to make projections for the evolution
of the whole Greenland ice sheet for the coming two
centuries. Originally developed to solve local ice flow problems of
high mechanical and physical complexity, Elmer/Ice has today reached
the maturity to solve larger-scale problems, earning the status of
an ice sheet model. Here, we summarise almost 10 yr of development
performed by different groups. Elmer/Ice solves the full-Stokes equations,
for isotropic but also anisotropic ice rheology, resolves the grounding line dynamics
as a contact problem, and contains various basal friction laws. Derived fields, like the age of the ice,
the strain rate or stress, can also be computed. Elmer/Ice includes two recently proposed inverse
methods to infer badly known parameters. Elmer is a highly parallelised code thanks to
recent developments and the implementation of a block preconditioned solver for the Stokes
system. In this paper, all these components are presented in detail, as well as the numerical
performance of the Stokes solver and developments planned for the future. |
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