Gravity enhanced bathymetric model beneath the Brunt Ice Shelf and Stancomb-Wills Glacier Tongue

• Main Authors: Hodgson, Dominic, Jordan, Tom, de Rydt, Jan, Fretwell, Peter, Seddon, Samuel, Becker, David, Hogan, Kelly, Smith, Andrew, Vaughan, David
• Format: Dataset
• Language: English
• Published: UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation 2019
• Subjects: "EARTH SCIENCE","OCEANS","BATHYMETRY/SEAFLOOR TOPOGRAPHY","BATHYMETRY"; "EARTH SCIENCE","SOLID EARTH","GRAVITY/GRAVITATIONAL FIELD","GRAVITY"; Bathymetry and Elevation; Gravity; Elevation; Brunt Ice Shelf; Stancomb-Wills Glacier Tongue; Antarctic; Hodgson; Seddon; Stancomb-Wills Glacier; Antarc*; Antarctica; Ice Shelf
• Online Access: https://dx.doi.org/10.5285/40bcedbe-fea0-4b41-b2f7-bf2d8494b5ad; https://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/01133

This gridded dataset contains the revised bathymetry model beneath the Brunt Ice Shelf and Stancomb-Wills Glacier Tongue, Antarctica, The revised bathymetric model integrates existing direct bathymetry observations and free air gravity anomaly data to provide the best possible estimate of sub-ice shelf bathymetry. The input direct bathymetric/topographic observations, observation locations, and the input free air compilation are also available as additional separate grid files. All files are provided in NetCDF format in Antarctic Polar Stereographic (EPSG:3031) projection with a horizontal resolution of 2km. The output bathymetry model (Final_adjusted_topography.nc), input topographic observations (Topographic_value_grid.nc) and input topographic observation coverage (Topographic_observation_coverage.nc) have elevation values of metres, positive upwards. The input free air gravity anomaly grid (Brunt_FAA_compilation_grid.nc) has values of mGal. The bathymetric model was produced for the paper of Hodgson et al., (2019) investigating the past and future dynamics of the Brunt Ice Shelf. The publication reference is; Hodgson, D. A., Jordan, T. A., De Rydt, J., Fretwell, P. T., Seddon, S. A., Becker, D., Hogan, K. A., Smith, A. M., and Vaughan, D. G.: Past and future dynamics of the Brunt Ice Shelf from seabed bathymetry and ice shelf geometry, The Cryosphere Discuss., https://doi.org/10.5194/tc-2018-206, in review, 2018. : Data lineage is described in the methods chapter of:- Hodgson, D. A., Jordan, T. A., De Rydt, J., Fretwell, P. T., Seddon, S. A., Becker, D., Hogan, K. A., Smith, A. M., and Vaughan, D. G.: Past and future dynamics of the Brunt Ice Shelf from seabed bathymetry and ice shelf geometry, The Cryosphere Discuss., https://doi.org/10.5194/tc-2018-206, in review, 2018. : Data quality issues are described in the methods chapter of:- Hodgson, D. A., Jordan, T. A., De Rydt, J., Fretwell, P. T., Seddon, S. A., Becker, D., Hogan, K. A., Smith, A. M., and Vaughan, D. G.: Past and future dynamics of the Brunt Ice Shelf from seabed bathymetry and ice shelf geometry, The Cryosphere Discuss., https://doi.org/10.5194/tc-2018-206, in review, 2018.