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| Titel |
Simulating the Antarctic ice sheet in the late-Pliocene warm period: PLISMIP-ANT, an ice-sheet model intercomparison project |
| VerfasserIn |
B. Boer, A. M. Dolan, J. Bernales, E. Gasson, H. Goelzer, N. R. Golledge, J. Sutter, P. Huybrechts, G. Lohmann, I. Rogozhina, A. Abe-Ouchi, F. Saito, R. S. W. Wal |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 9, no. 3 ; Nr. 9, no. 3 (2015-05-06), S.881-903 |
| Datensatznummer |
250116791
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| Publikation (Nr.) |
 copernicus.org/tc-9-881-2015.pdf |
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| Zusammenfassung |
| In the context of future climate change, understanding the nature and
behaviour of ice sheets during warm intervals in Earth history is of
fundamental importance. The late Pliocene warm period (also known as the
PRISM interval: 3.264 to 3.025 million years before present) can serve as a
potential analogue for projected future climates. Although Pliocene ice
locations and extents are still poorly constrained, a significant
contribution to sea-level rise should be expected from both the Greenland ice
sheet and the West and East Antarctic ice sheets based on palaeo sea-level
reconstructions. Here, we present results from simulations of the Antarctic
ice sheet by means of an international Pliocene Ice Sheet Modeling
Intercomparison Project (PLISMIP-ANT). For the experiments, ice-sheet models
including the shallow ice and shelf approximations have been used to simulate
the complete Antarctic domain (including grounded and floating ice). We
compare the performance of six existing numerical ice-sheet models in
simulating modern control and Pliocene ice sheets by a suite of five
sensitivity experiments. We include an overview of the different ice-sheet
models used and how specific model configurations influence the resulting
Pliocene Antarctic ice sheet. The six ice-sheet models simulate a comparable
present-day ice sheet, considering the models are set up with their own
parameter settings. For the Pliocene, the results demonstrate the difficulty
of all six models used here to simulate a significant retreat or re-advance
of the East Antarctic ice grounding line, which is thought to have happened
during the Pliocene for the Wilkes and Aurora basins. The specific sea-level
contribution of the Antarctic ice sheet at this point cannot be conclusively
determined, whereas improved grounding line physics could be essential for a
correct representation of the migration of the grounding-line of the
Antarctic ice sheet during the Pliocene. |
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