Anomalous South Pacific lithosphere dynamics derived from new total sediment thickness estimates off the West Antarctic margin
Paleotopographic models of the West Antarctic margin, which are essential for robust simulations of paleoclimate scenarios, lack information on sediment thickness and geodynamic conditions, resulting in large uncertainties. A new total sediment thickness grid spanning the Ross Sea–Amundsen Sea–Belli...
Published in: | Global and Planetary Change |
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2014
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Online Access: | https://epic.awi.de/id/eprint/36501/ https://epic.awi.de/id/eprint/36501/1/Wobbe-etal_lithosphere-dynamics-sediment-thickness-W-Antarctic-margin_GlobalPlanetaryChange_2014.pdf https://epic.awi.de/id/eprint/36501/2/Wobbe-etal_lithosphere-dynamics-sediment-thickness-W-Antarctic-margin_GlobalPlanetaryChange_2014_suppl.pdf http://www.sciencedirect.com/science/article/pii/S092181811400191X https://hdl.handle.net/10013/epic.44333 https://hdl.handle.net/10013/epic.44333.d001 https://hdl.handle.net/10013/epic.44333.d002 |
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ftawi:oai:epic.awi.de:36501 2024-09-15T17:39:09+00:00 Anomalous South Pacific lithosphere dynamics derived from new total sediment thickness estimates off the West Antarctic margin Wobbe, Florian Lindeque, Ansa Gohl, Karsten 2014-12 application/pdf https://epic.awi.de/id/eprint/36501/ https://epic.awi.de/id/eprint/36501/1/Wobbe-etal_lithosphere-dynamics-sediment-thickness-W-Antarctic-margin_GlobalPlanetaryChange_2014.pdf https://epic.awi.de/id/eprint/36501/2/Wobbe-etal_lithosphere-dynamics-sediment-thickness-W-Antarctic-margin_GlobalPlanetaryChange_2014_suppl.pdf http://www.sciencedirect.com/science/article/pii/S092181811400191X https://hdl.handle.net/10013/epic.44333 https://hdl.handle.net/10013/epic.44333.d001 https://hdl.handle.net/10013/epic.44333.d002 unknown Elsevier https://epic.awi.de/id/eprint/36501/1/Wobbe-etal_lithosphere-dynamics-sediment-thickness-W-Antarctic-margin_GlobalPlanetaryChange_2014.pdf https://hdl.handle.net/10013/epic.44333.d001 https://epic.awi.de/id/eprint/36501/2/Wobbe-etal_lithosphere-dynamics-sediment-thickness-W-Antarctic-margin_GlobalPlanetaryChange_2014_suppl.pdf https://hdl.handle.net/10013/epic.44333.d002 Wobbe, F. , Lindeque, A. and Gohl, K. orcid:0000-0002-9558-2116 (2014) Anomalous South Pacific lithosphere dynamics derived from new total sediment thickness estimates off the West Antarctic margin , Global and Planetary Change, 123 (Part A), pp. 139-149 . doi:10.1016/j.gloplacha.2014.09.006 <https://doi.org/10.1016/j.gloplacha.2014.09.006> , hdl:10013/epic.44333 EPIC3Global and Planetary Change, Elsevier, 123(Part A), pp. 139-149, ISSN: 0921-8181 Article isiRev 2014 ftawi https://doi.org/10.1016/j.gloplacha.2014.09.006 2024-06-24T04:09:53Z Paleotopographic models of the West Antarctic margin, which are essential for robust simulations of paleoclimate scenarios, lack information on sediment thickness and geodynamic conditions, resulting in large uncertainties. A new total sediment thickness grid spanning the Ross Sea–Amundsen Sea–Bellingshausen Sea basins is presented and is based on all the available seismic reflection, borehole, and gravity modeling data offshore West Antarctica. This grid was combined with NGDC's global 5 arc minute grid of ocean sediment thickness (Whittaker et al., 2013) and extends the NGDC grid further to the south. Sediment thickness along the West Antarctic margin tends to be 3–4 km larger than previously assumed. The sediment volume in the Bellingshausen, Amundsen, and Ross Sea basins amounts to 3.61, 3.58, and 2.78 million km3, respectively. The residual basement topography of the South Pacific has been revised and the new data show an asymmetric trend over the Pacific–Antarctic Ridge. Values are anomalously high south of the spreading ridge and in the Ross Sea area, where the topography seems to be affected by persistent mantle processes. In contrast, the basement topography offshore Marie Byrd Land cannot be attributed to dynamic topography, but rather to crustal thickening due to intraplate volcanism. Present-day dynamic topography models disagree with the presented revised basement topography of the South Pacific, rendering paleotopographic reconstructions with such a limited dataset still fairly uncertain. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Marie Byrd Land Ross Sea West Antarctica Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Global and Planetary Change 123 139 149 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Paleotopographic models of the West Antarctic margin, which are essential for robust simulations of paleoclimate scenarios, lack information on sediment thickness and geodynamic conditions, resulting in large uncertainties. A new total sediment thickness grid spanning the Ross Sea–Amundsen Sea–Bellingshausen Sea basins is presented and is based on all the available seismic reflection, borehole, and gravity modeling data offshore West Antarctica. This grid was combined with NGDC's global 5 arc minute grid of ocean sediment thickness (Whittaker et al., 2013) and extends the NGDC grid further to the south. Sediment thickness along the West Antarctic margin tends to be 3–4 km larger than previously assumed. The sediment volume in the Bellingshausen, Amundsen, and Ross Sea basins amounts to 3.61, 3.58, and 2.78 million km3, respectively. The residual basement topography of the South Pacific has been revised and the new data show an asymmetric trend over the Pacific–Antarctic Ridge. Values are anomalously high south of the spreading ridge and in the Ross Sea area, where the topography seems to be affected by persistent mantle processes. In contrast, the basement topography offshore Marie Byrd Land cannot be attributed to dynamic topography, but rather to crustal thickening due to intraplate volcanism. Present-day dynamic topography models disagree with the presented revised basement topography of the South Pacific, rendering paleotopographic reconstructions with such a limited dataset still fairly uncertain. |
format |
Article in Journal/Newspaper |
author |
Wobbe, Florian Lindeque, Ansa Gohl, Karsten |
spellingShingle |
Wobbe, Florian Lindeque, Ansa Gohl, Karsten Anomalous South Pacific lithosphere dynamics derived from new total sediment thickness estimates off the West Antarctic margin |
author_facet |
Wobbe, Florian Lindeque, Ansa Gohl, Karsten |
author_sort |
Wobbe, Florian |
title |
Anomalous South Pacific lithosphere dynamics derived from new total sediment thickness estimates off the West Antarctic margin |
title_short |
Anomalous South Pacific lithosphere dynamics derived from new total sediment thickness estimates off the West Antarctic margin |
title_full |
Anomalous South Pacific lithosphere dynamics derived from new total sediment thickness estimates off the West Antarctic margin |
title_fullStr |
Anomalous South Pacific lithosphere dynamics derived from new total sediment thickness estimates off the West Antarctic margin |
title_full_unstemmed |
Anomalous South Pacific lithosphere dynamics derived from new total sediment thickness estimates off the West Antarctic margin |
title_sort |
anomalous south pacific lithosphere dynamics derived from new total sediment thickness estimates off the west antarctic margin |
publisher |
Elsevier |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/36501/ https://epic.awi.de/id/eprint/36501/1/Wobbe-etal_lithosphere-dynamics-sediment-thickness-W-Antarctic-margin_GlobalPlanetaryChange_2014.pdf https://epic.awi.de/id/eprint/36501/2/Wobbe-etal_lithosphere-dynamics-sediment-thickness-W-Antarctic-margin_GlobalPlanetaryChange_2014_suppl.pdf http://www.sciencedirect.com/science/article/pii/S092181811400191X https://hdl.handle.net/10013/epic.44333 https://hdl.handle.net/10013/epic.44333.d001 https://hdl.handle.net/10013/epic.44333.d002 |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Marie Byrd Land Ross Sea West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Marie Byrd Land Ross Sea West Antarctica |
op_source |
EPIC3Global and Planetary Change, Elsevier, 123(Part A), pp. 139-149, ISSN: 0921-8181 |
op_relation |
https://epic.awi.de/id/eprint/36501/1/Wobbe-etal_lithosphere-dynamics-sediment-thickness-W-Antarctic-margin_GlobalPlanetaryChange_2014.pdf https://hdl.handle.net/10013/epic.44333.d001 https://epic.awi.de/id/eprint/36501/2/Wobbe-etal_lithosphere-dynamics-sediment-thickness-W-Antarctic-margin_GlobalPlanetaryChange_2014_suppl.pdf https://hdl.handle.net/10013/epic.44333.d002 Wobbe, F. , Lindeque, A. and Gohl, K. orcid:0000-0002-9558-2116 (2014) Anomalous South Pacific lithosphere dynamics derived from new total sediment thickness estimates off the West Antarctic margin , Global and Planetary Change, 123 (Part A), pp. 139-149 . doi:10.1016/j.gloplacha.2014.09.006 <https://doi.org/10.1016/j.gloplacha.2014.09.006> , hdl:10013/epic.44333 |
op_doi |
https://doi.org/10.1016/j.gloplacha.2014.09.006 |
container_title |
Global and Planetary Change |
container_volume |
123 |
container_start_page |
139 |
op_container_end_page |
149 |
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1810477817752715264 |