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| Titel |
Modelling the response of the Lambert Glacier–Amery Ice Shelf system, East Antarctica, to uncertain climate forcing over the 21st and 22nd centuries |
| VerfasserIn |
Y. Gong, S. L. Cornford, A. J. Payne |
| 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 ; 8, no. 3 ; Nr. 8, no. 3 (2014-06-18), S.1057-1068 |
| Datensatznummer |
250116166
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| Publikation (Nr.) |
 copernicus.org/tc-8-1057-2014.pdf |
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| Zusammenfassung |
| The interaction between the climate system and the large polar ice sheet
regions is a key process in global environmental change. We carried out
dynamic ice simulations of one of the largest drainage systems in East
Antarctica: the Lambert Glacier–Amery Ice Shelf system, with an adaptive mesh
ice sheet model. The ice sheet model is driven by surface accumulation and
basal melt rates computed by the FESOM (Finite-Element Sea-Ice Ocean
Model) ocean model and the RACMO2 (Regional
Atmospheric Climate Model) and LMDZ4 (Laboratoire de Météorologie Dynamique Zoom)
atmosphere models. The change of ice thickness and velocity in the ice shelf
is mainly influenced by the basal melt distribution, but, although the ice
shelf thins in most of the simulations, there is little grounding line
retreat. We find that the Lambert Glacier grounding line can retreat as much
as 40 km if there is sufficient thinning of the ice shelf south of Clemence
Massif, but the ocean model does not provide sufficiently high melt rates in
that region. Overall, the increased accumulation computed by the atmosphere
models outweighs ice stream acceleration so that the net contribution to sea
level rise is negative. |
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