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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Bibliographic Details
Main Authors: Wobbe, Florian, Lindeque, Ansa, Gohl, Karsten
Format: Dataset
Language:English
Published: PANGAEA 2014
Subjects:
Title
File name
File format
File size
Uniform resource locator/link to file
Marine Geophysics @ AWI AWI_GeoPhy
Amundsen Sea
Antarc*
Antarctic
Antarctica
Bellingshausen Sea
Ross Sea
West Antarctica
Online Access:https://dx.doi.org/10.1594/pangaea.835589
https://doi.pangaea.de/10.1594/PANGAEA.835589
Description
Summary: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 ... : 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 ...

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