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Capabilities and performance of Elmer/Ice, a new-generation ice sheet model

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Title: Capabilities and performance of Elmer/Ice, a new-generation ice sheet model
Authors: Gagliardini, O. Browse this author
Zwinger, T. Browse this author
Gillet-Chaulet, F. Browse this author
Durand, G. Browse this author
Favier, L. Browse this author
de Fleurian, B. Browse this author
Greve, R. Browse this author →KAKEN DB
Malinen, M. Browse this author
Martín, C. Browse this author
Råback, P. Browse this author
Ruokolainen, J. Browse this author
Sacchettini, M. Browse this author
Schäfer, M. Browse this author
Seddik, H. Browse this author
Thies, J. Browse this author
Issue Date: 22-Aug-2013
Publisher: Copernicus Publications
Journal Title: Geoscientific Model Development
Volume: 6
Issue: 4
Start Page: 1299
End Page: 1318
Publisher DOI: 10.5194/gmd-6-1299-2013
Abstract: 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.
Type: article
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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