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| Titel |
Resolving Grounding Line Dynamics with the BISICLES Adaptive Mesh |
| VerfasserIn |
Daniel Martin, Stephen Cornford, Peter Schwartz, Anne Le Brocq, Antony Payne, William Lipscomb, Esmond Ng |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250083026
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| Zusammenfassung |
| The dynamics of ice sheets span a wide range of scales. Correctly
resolving the dynamics of localized regions such as grounding lines
and ice streams requires extremely fine (better than 1 km in places)
resolution. Modeling an entire continental-scale ice sheet at such
resolutions is impractical or impossible with current computational
resources. At the same time, such fine resolution is unnecessary over
large dynamically quiescent regions, which makes ice sheets ideal
candidates for adaptive mesh refinement (AMR).
BISICLES is a scalable AMR ice sheet modeling code built on the Chombo
framework and is a part of the Community Ice Sheet Model (CISM). With
a dynamical core based on the vertically-integrated model of Schoof
and Hindmarsh (2010), BISICLES can resolve dynamically important
regions at the sub-kilometer scale while using much coarser resolution
where appropriate. We present results justifying the applicabilty of
our model for grounding line problems. In particular, we compare our
results with those computed using Full-Stokes and Shallow-Shelf
Approximation models.
Recent improvements to the BISICLES model include the development of
an "Embedded Boundary" discretization to improve the discretization of
the scheme around grounding lines, which may relax the stringent
resolution requirements near grounding lines. |
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