Influence of the structural dichotomy of Antarctic lithosphere on regional glacial-isostatic adjustment
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 belo...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_238762 2023-05-15T13:43:52+02:00 Influence of the structural dichotomy of Antarctic lithosphere on regional glacial-isostatic adjustment Klemann, V. Rau, D. Martinec, Z. Wolf, D. 2009 https://gfzpublic.gfz-potsdam.de/pubman/item/item_238762 unknown https://gfzpublic.gfz-potsdam.de/pubman/item/item_238762 Geophysical Research Abstracts Vol. 11, EGU2009-13473 550 - Earth sciences info:eu-repo/semantics/conferenceObject 2009 ftgfzpotsdam 2022-09-14T05:53:29Z 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. Conference Object Antarc* Antarctic Antarctic Peninsula Antarctica West Antarctica GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic The Antarctic Antarctic Peninsula West Antarctica |
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Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
topic |
550 - Earth sciences |
spellingShingle |
550 - Earth sciences Klemann, V. Rau, D. Martinec, Z. Wolf, D. Influence of the structural dichotomy of Antarctic lithosphere on regional glacial-isostatic adjustment |
topic_facet |
550 - Earth sciences |
description |
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. |
format |
Conference Object |
author |
Klemann, V. Rau, D. Martinec, Z. Wolf, D. |
author_facet |
Klemann, V. Rau, D. Martinec, Z. Wolf, D. |
author_sort |
Klemann, V. |
title |
Influence of the structural dichotomy of Antarctic lithosphere on regional glacial-isostatic adjustment |
title_short |
Influence of the structural dichotomy of Antarctic lithosphere on regional glacial-isostatic adjustment |
title_full |
Influence of the structural dichotomy of Antarctic lithosphere on regional glacial-isostatic adjustment |
title_fullStr |
Influence of the structural dichotomy of Antarctic lithosphere on regional glacial-isostatic adjustment |
title_full_unstemmed |
Influence of the structural dichotomy of Antarctic lithosphere on regional glacial-isostatic adjustment |
title_sort |
influence of the structural dichotomy of antarctic lithosphere on regional glacial-isostatic adjustment |
publishDate |
2009 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_238762 |
geographic |
Antarctic The Antarctic Antarctic Peninsula West Antarctica |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica West Antarctica |
op_source |
Geophysical Research Abstracts Vol. 11, EGU2009-13473 |
op_relation |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_238762 |
_version_ |
1766194426456047616 |