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| Titel |
Influence of the structural dichotomy of Antarctic lithosphere on regional glacial-isostatic adjustment |
| VerfasserIn |
V. Klemann, D. Drau, Z. Martinec, D. Wolf |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250031087
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| Zusammenfassung |
| The strong lithospheric dichotomy between eastern and western Antarctica origins from
the West Antarctic Rift. The rheological implications are therefore a reduction of
elastic-lithosphere thickness by more than a factor of 2 from East to West Antarctica,
and strongly reduced mantle viscosities below West Antarctica and the Antarctic
Peninsula. We apply a spectral finite element model which enables the consideration of
lateral viscosity variations in the upper mantle. Variations in seismic velocity are
transformed to viscosity variations applying scaling laws, and the glaciation model IJ05
(Ivins & James, 2005, Ant. Sci.) is used for parameterizing the deglaciation of
Antarctica. Considering different parameterizations of lithosphere structure we study the
implications of lateral variability on the glacial-isostatic adjustment of Antarctica. |
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