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| Titel |
Modeling Cenozoic Antarctic ice sheet variations with restored West Antarctic topography |
| VerfasserIn |
David Pollard, Robert DeConto |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250041054
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| Zusammenfassung |
| The growth and subsequent variations of large-scale Antarctic ice cover
across the Eocene-Oligocene transition is examined with a 3-D numerical
ice-sheet/shelf model. Hysteresis between climate and ice volume
is investigated, and whether ice volume can retreat significantly after the
first threshold growth to full continental size; these questions are important
given proxy data implying substantial sea-level variations through
the late Oligocene and Miocene. Model results are compared using modern
rebounded topography versus a restored West Antarctic topographic
reconstruction at the Eocene-Oligocene boundary (D. Wilson and B. Luyendyk,
2009, Geophys Res Lett). We also describe the sensitivity to (i) horizontal
resolution of the ice-sheet model, and (ii) climate forcing by
GCM look-up table versus simple parameterizations. |
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