/* DATA DESCRIPTION: Citation: Wobbe, Florian; Lindeque, Ansa; Gohl, Karsten (2014): Total sediment thickness grid of the Southern Pacific Ocean off West Antarctica, links to NetCDF files. PANGAEA, https://doi.org/10.1594/PANGAEA.835589, Supplement to: Wobbe, F et al. (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 Abstract: 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 kmĀ³, 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. Project(s): Marine Geophysics @ AWI (AWI_GeoPhy) (URI: https://www.awi.de/en/science/geosciences/geophysics.html) Coverage: LATITUDE: -69.000000 * LONGITUDE: -122.000000 Event(s): Southern_Pacific_Ocean_off_West_Antarctica * LATITUDE: -69.000000 * LONGITUDE: -122.000000 * LOCATION: South Pacific Ocean Parameter(s): Title (Title) * PI: Wobbe, Florian (florian.wobbe@awi.de) File name (File name) * PI: Wobbe, Florian (florian.wobbe@awi.de) File format (File format) * PI: Wobbe, Florian (florian.wobbe@awi.de) File size [kByte] (File size) * PI: Wobbe, Florian (florian.wobbe@awi.de) Uniform resource locator/link to file (URL file) * PI: Wobbe, Florian (florian.wobbe@awi.de) License: Creative Commons Attribution-ShareAlike 3.0 Unported (CC-BY-SA-3.0) (URI: https://creativecommons.org/licenses/by-sa/3.0/) Size: 25 data points */ Title File name File format File size [kByte] URL file Total sediment thickness grid extent sedthick_v1_extent.kml kml (Google Earth) 34 https://store.pangaea.de/Publications/WobbeF_et_al_2014/sedthick_v1_extent.kml Total sediment thickness grid, 5x5 km sedthick_v1_5km_epsg3031.nc netCDF 728 https://store.pangaea.de/Publications/WobbeF_et_al_2014/sedthick_v1_5km_epsg3031.nc Sediment thickness above RSU6 unconformity, 5x5 km sedthick_v1_above_rsu6_5km_epsg3031.nc netCDF 725 https://store.pangaea.de/Publications/WobbeF_et_al_2014/sedthick_v1_above_rsu6_5km_epsg3031.nc Source identification grid, 5x5 km sedthick_v1_sid_5km_epsg3031.nc netCDF 59 https://store.pangaea.de/Publications/WobbeF_et_al_2014/sedthick_v1_sid_5km_epsg3031.nc Gobal total sediment thickness grid, 5x5 min sedthick_world_v3_5min_epsg4326.nc netCDF 4335 https://store.pangaea.de/Publications/WobbeF_et_al_2014/sedthick_world_v3_5min_epsg4326.nc