Total sediment thickness grid of the Southern Pacific Ocean off West Antarctica, links to NetCDF files
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...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.835589 2023-05-15T13:24:11+02:00 Total sediment thickness grid of the Southern Pacific Ocean off West Antarctica, links to NetCDF files Wobbe, Florian Lindeque, Ansa Gohl, Karsten LATITUDE: -69.000000 * LONGITUDE: -122.000000 2014-09-05 text/tab-separated-values, 25 data points https://doi.pangaea.de/10.1594/PANGAEA.835589 https://doi.org/10.1594/PANGAEA.835589 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.835589 https://doi.org/10.1594/PANGAEA.835589 CC-BY-SA-3.0: Creative Commons Attribution-ShareAlike 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY-SA Supplement to: Wobbe, Florian; Lindeque, Ansa; Gohl, Karsten (2014): Anomalous South Pacific lithosphere dynamics derived from new total sediment thickness estimates off the West Antarctic margin. Global and Planetary Change, 123, 139-149, https://doi.org/10.1016/j.gloplacha.2014.09.006 AWI_GeoPhy File format File name File size Marine Geophysics @ AWI Southern_Pacific_Ocean_off_West_Antarctica South Pacific Ocean Title Uniform resource locator/link to file Dataset 2014 ftpangaea https://doi.org/10.1594/PANGAEA.835589 https://doi.org/10.1016/j.gloplacha.2014.09.006 2023-01-20T09:03:44Z 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, doi:10.1002/ggge.20181) 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. Dataset Amundsen Sea Antarc* Antarctic Antarctica Bellingshausen Sea Marie Byrd Land Ross Sea West Antarctica PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Ross Sea West Antarctica Amundsen Sea Bellingshausen Sea Pacific Byrd Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(-122.000000,-122.000000,-69.000000,-69.000000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_GeoPhy File format File name File size Marine Geophysics @ AWI Southern_Pacific_Ocean_off_West_Antarctica South Pacific Ocean Title Uniform resource locator/link to file |
spellingShingle |
AWI_GeoPhy File format File name File size Marine Geophysics @ AWI Southern_Pacific_Ocean_off_West_Antarctica South Pacific Ocean Title Uniform resource locator/link to file Wobbe, Florian Lindeque, Ansa Gohl, Karsten Total sediment thickness grid of the Southern Pacific Ocean off West Antarctica, links to NetCDF files |
topic_facet |
AWI_GeoPhy File format File name File size Marine Geophysics @ AWI Southern_Pacific_Ocean_off_West_Antarctica South Pacific Ocean Title Uniform resource locator/link to file |
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, doi:10.1002/ggge.20181) 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 |
Dataset |
author |
Wobbe, Florian Lindeque, Ansa Gohl, Karsten |
author_facet |
Wobbe, Florian Lindeque, Ansa Gohl, Karsten |
author_sort |
Wobbe, Florian |
title |
Total sediment thickness grid of the Southern Pacific Ocean off West Antarctica, links to NetCDF files |
title_short |
Total sediment thickness grid of the Southern Pacific Ocean off West Antarctica, links to NetCDF files |
title_full |
Total sediment thickness grid of the Southern Pacific Ocean off West Antarctica, links to NetCDF files |
title_fullStr |
Total sediment thickness grid of the Southern Pacific Ocean off West Antarctica, links to NetCDF files |
title_full_unstemmed |
Total sediment thickness grid of the Southern Pacific Ocean off West Antarctica, links to NetCDF files |
title_sort |
total sediment thickness grid of the southern pacific ocean off west antarctica, links to netcdf files |
publisher |
PANGAEA |
publishDate |
2014 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.835589 https://doi.org/10.1594/PANGAEA.835589 |
op_coverage |
LATITUDE: -69.000000 * LONGITUDE: -122.000000 |
long_lat |
ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(-122.000000,-122.000000,-69.000000,-69.000000) |
geographic |
Antarctic Ross Sea West Antarctica Amundsen Sea Bellingshausen Sea Pacific Byrd Marie Byrd Land |
geographic_facet |
Antarctic Ross Sea West Antarctica Amundsen Sea Bellingshausen Sea Pacific Byrd Marie Byrd Land |
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 |
Supplement to: Wobbe, Florian; Lindeque, Ansa; Gohl, Karsten (2014): Anomalous South Pacific lithosphere dynamics derived from new total sediment thickness estimates off the West Antarctic margin. Global and Planetary Change, 123, 139-149, https://doi.org/10.1016/j.gloplacha.2014.09.006 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.835589 https://doi.org/10.1594/PANGAEA.835589 |
op_rights |
CC-BY-SA-3.0: Creative Commons Attribution-ShareAlike 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-SA |
op_doi |
https://doi.org/10.1594/PANGAEA.835589 https://doi.org/10.1016/j.gloplacha.2014.09.006 |
_version_ |
1766377896349270016 |