Modeled bathymetry beneath Roi Baudouin and Borchgrevink ice shelves, East Antarctica

• Main Authors: Eisermann, Hannes, Eagles, Graeme, Ruppel, Antonia, Läufer, Andreas, Jokat, Wilfried
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2021
• Subjects: Dronning Maud Land; East Antarctica; gravity inversion; subglacial bathymetry; LONGITUDE; LATITUDE; Coordinate, x, relative; Coordinate, y, relative; Bed elevation; Ice base elevation; Model; Antarctic; Borchgrevink; Roi Baudouin; Antarc*; Antarctica; Antarctique*; Ice Shelves
• Online Access: https://dx.doi.org/10.1594/pangaea.927545; https://doi.pangaea.de/10.1594/PANGAEA.927545

The lack of consistent and reliable estimates of the bathymetry beneath the Roi Baudouin and Borchgrevink ice shelves of Dronning Maud Land is addressed by inverting airborne gravity data to model the underlying bathymetry. The bathymetric model presented here is mainly based on geophysical data sets acquired over the course of three consecutive seasons in early 2011, early 2012 and late 2012 using the Alfred Wegener Institute's Basler BT-67 aircraft 'Polar 5' and 'Polar 6' within the research program 'Geodynamic Evolution of East Antarctica' (GEA I – GEA III). The gravity inversion is supported by known depth reference points from multibeam data close to calving fronts and ice thickness radar data across grounded ice sheets. See source data sets. The dataset comprises seabed and ice base depths relative to WGS84 at a reolution of 5 km. : Additional source data sets (not publicly available); hydroacoustic data and CTD casts by the Université libre de Bruxelles: Derwael, J. (1985). Levés Altimétriques - BRB - Côte Princesse Ragnild, Expéditions Antarctiques Belgo-Néerlandaises (5 maps). Exantar. F. Pattyn, pers. comm.---Additional source data sets from National Oceanic and Atmospheric Administration (NOAA) database:Survey ID InstituteANTAC21A Japan Oceanographic Data CenterANTAC24 Japan Oceanographic Data CenterANTAC26 Japan Oceanographic Data CenterANTAC8B Japan Oceanographic Data CenterANTAC9B Japan Oceanographic Data CenterJARE27L2 Japanese Antarctic Research ExpeditionJARE27L3 Japanese Antarctic Research ExpeditionJARE28L2 Japanese Antarctic Research ExpeditionJARE28L3 Japanese Antarctic Research ExpeditionJARE29L2 Japanese Antarctic Research ExpeditionJARE29L3 Japanese Antarctic Research ExpeditionJARE29L4 Japanese Antarctic Research ExpeditionJARE30G2 Japanese Antarctic Research ExpeditionJARE30G3 Japanese Antarctic Research ExpeditionJARE30G4 Japanese Antarctic Research ExpeditionJARE30G6 Japanese Antarctic Research ExpeditionJARE32L3 Japanese Antarctic Research ExpeditionJARE32L4 Japanese Antarctic Research ExpeditionJARE32L5 Japanese Antarctic Research ExpeditionJARE32L6 Japanese Antarctic Research ExpeditionJARE33L2 Japanese Antarctic Research ExpeditionJARE34B Japanese Antarctic Research ExpeditionMF103_1 LPCM, Bordeaux University, FranceOB2B Vernadsky Institute of Geochemistry and Analytical ChemistryRSA76 Lamont-Doherty Earth Observatory