Total sediment thickness grid of the Southern Pacific Ocean off West Antarctica, links to NetCDF files ...

• 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

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 ...