Thwaites Glacier geological map and associated geophysical information. ...

• Main Authors: Jordan, Tom, Thompson, Sarah, Kulessa, Bernd, Ferraccioli, Fausto
• Format: Dataset
• Language: English
• Published: NERC EDS UK Polar Data Centre 2023
• Subjects: "EARTH SCIENCE","LAND SURFACE","TOPOGRAPHY","SURFACE ROUGHNESS"; "EARTH SCIENCE","LAND SURFACE","TOPOGRAPHY","TERRAIN ELEVATION"; "EARTH SCIENCE","SOLID EARTH","GRAVITY/GRAVITATIONAL FIELD","GRAVITY"; "EARTH SCIENCE","SOLID EARTH","GEOMAGNETISM","MAGNETIC FIELD"; "EARTH SCIENCE","CRYOSPHERE","GLACIERS/ICE SHEETS"; Thwaites glacier; basal roughness; bed elevation; geological map; gravity; magnetic; Antarctic; Thwaites Glacier; West Antarctica; Antarc*; Antarctica; British Antarctic Survey
• Online Access: https://dx.doi.org/10.5285/189823ed-6a14-4eba-87fb-38ba3e5e30fb; https://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/01720

The geology underlying Thwaites Glacier plays a critical role in mediating ice flow in this region yet is extremely poorly known. Using new compilations of airborne radar, magnetic and gravity data, supported by published geological evidence, we have interpreted the subglacial geology of the Thwaites Glacier region. Here we provide the new data compilations, results of 3D inversions and vector components defining the lithological units on our new geological sketch map. British Antarctic Survey (BAS) National Capability contribution to the International Thwaites Glacier Collaboration (ITGC) (TJ), NERC Grant NE/S006621/1 (Geophysical Habitats of Subglacial Thwaites (Ghost)) (BK), Antarctic Science Collaboration Initiative program (Australian Government) (ST), European Space Agency (ESA) 4D Antarctica project (FF). ... : This dataset includes three components: Input geophysical compilations, inversion results and interpreted geological boundaries. Details of the data compilation, inversion and basic geological interpretation are presented here. This dataset is the companion to the following paper Jordan et al., (in prep) Geological sketch map and implications for ice flow of Thwaites Glacier, West Antarctica, from integrated aerogeophysical observations, Science Advances., which contains full details of the geological interpretation and should be cited when this dataset is used. Input geophysical compilations: This dataset includes compilations of aerogeophysical data collected across the Thwaites Glacier region of West Antarctica over the past several decades. Surveys used include: AGASEA and BBAS which collected radar, magnetic and gravity data (Diehl et al., 2008; Holt et al., 2006; Jordan et al., 2010; Vaughan et al., 2006). NASA Operation Ice Bridge (OIB) which collected radar and gravity data (Paden et al., 2010, ...