72f46ad0-063d-49a7-ba89-45edc5d9aac7 eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2020-10-06 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica, 1977-2017 2020-10-06 creation 2020-10-06 revision 2020-10-06 publication 2020-10-06 released 1.0 https://doi.org/10.5285/72f46ad0-063d-49a7-ba89-45edc5d9aac7 doi GB/NERC/BAS/PDC/01401 https://data.bas.ac.uk/ NE/D008751/1 award NE/D009200/1 award NE/D008638/1 award NE/G013071/1 award Please cite this item as: Napoleoni, F., Jamieson, S., Ross, N., Bentley, M., Rivera, A., Smith, A., Siegert, M., Paxman, G., Gacitúa, G., Uribe, J., Zamora, R., Brisbourne, A., & Vaughan, D. (2020). Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica, 1977-2017 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/72F46AD0-063D-49A7-BA89-45EDC5D9AAC7 A new subglacial bed Digital Elevation Model (DEM) from Ellsworth Subglacial Highlands (ESH) was created from previously gridded bed elevation data and new unpublished radar data. The new DEM includes the upper reaches of Pine Island Glacier, Rutford and Institute Ice Streams and reveals new topographical features. The main findings on this new DEM are two linear deep throughs with a perpendicular transection valley near Subglacial Lake Ellsworth. Additionally, using the new DEM and ice surface elevation data from CryoSat2 ice surface DEM, a hydropotential model was built and used to create a detailed hydropotential model of ESH to simulate the subglacial hydrological network. This approach allowed us to characterize basal hydrology, subglacial water catchments and connections between them. In this characterization we noticed the mismatch between subglacial hydrological catchment and ice surfaces catchment of Rutford Ice Stream, Pine Island Glacier and Thwaites Glacier. Funding was provided by NERC Antarctic Funding Initiative (AFI) grants NE/D008751/1, NE/D009200/1, and NE/D008638/1, and NERC grant NE/G013071/1. No credit. completed Napoleoni, Felipe Durham University Researcher author Jamieson, Stewart Durham University Researcher author Ross, Neil Newcastle University Researcher author Bentley, Michael Durham University Researcher author Rivera, Andrés Universidad de Chile and Universidad Austral de Chile Researcher author Smith, Andrew British Antarctic Survey Researcher author Siegert, Martin Imperial College London Researcher author Paxman, Guy Lamont-Doherty Earth Observatory Researcher author Gacitúa, Guisella Universidad Austral de Chile Researcher author Uribe, José Centro de Estudios Cientificos Researcher author Zamora, Rodrigo Centro de Estudios Cientificos Researcher author Brisbourne, Alex British Antarctic Survey Researcher author Vaughan, David British Antarctic Survey Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Elevation/Ice Sheet Elevation EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Topography/Ice Sheet Topography EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glaciers theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Ellsworth Mountains Pine Island Glacier Rutford Ice Stream Thwaites Glacier subglacial hydrology theme West Antarctica, Ellsworth Subglacial Highlands Antarctica place Elevation theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions This data is supplied under Open Government Licence v3.0 doi doi crossReference doi doi crossReference url url crossReference doi doi crossReference url url crossReference doi doi crossReference doi doi crossReference doi doi crossReference url url crossReference doi doi crossReference textTable eng utf8 climatologyMeteorologyAtmosphere elevation geoscientificInformation imageryBaseMapsEarthCover -90.7 -82.8 -80.0 -78.5 1977-01-01 2017-12-19 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor application/octet-stream image/tiff bytes 3355443 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=72f46ad0-063d-49a7-ba89-45edc5d9aac7 WWW:LINK-1.0-http--link Get Data Download data download bytes 3355443 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=72f46ad0-063d-49a7-ba89-45edc5d9aac7 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: We used four existing gridded bed elevation data to create a new Digital Elevation Model (DEM) of the Ellsworth Subglacial Highlands (ESH). This data include: BedMap2 (Fretwell et al., 2013), ice thickness measurements from DELORES (2007-2009) and CECs (2005/2006) (Siegert et al., 2012), new along-track ice thickness measurements from the 2014 CECs RES campaign (Rivera et al., 2015) and unpublished radar measurements from the CECs 2017 RES field campaign in ESH region using a Very High Frequency (VHF) radar and a Medium Frequency (MF) radar (Zamora et al., 2019; Uribe et al., 2019). We used a 2 km grid mesh with a continuous curvature tension spline algorithm (Paxman et al., 2017) to grid the data. We masked the grid to remove interpolated values more than 5 km from the nearest measured data point and replaced them with BedMap2 bed elevation values. We down-sampled the original cell size of BedMap2 (1 km) to match the resolution of the new DEM (2 km) using the nearest neighbour algorithm. Values of bed elevation were calculated relative to the WGS84 ellipsoid using WGS84 EPSG3031 as spatial reference system. Additionally, we down-sampled de cell size of the ice surface data from CryoSat2 (Slater et al., 2018) to match the resolution of the new DEM (2 km) and we built a hydropotential model to determine the hydrological head, following Shreve (1972). Using this hydropotential model we simulated the subglacial drainage system of the ESH following Schwanghart and Scherler (2014). More details of the processing and modelling is provided in Napoleoni et al. (submitted). Data collection: Matlab R2020b Reflex-Win v. 8.0.2 QGIS 3.2.1 Data quality: In January 2014 ~1100 km of RES data collected by CECs over an area of ~7000 km2 were acquired with a line spacing of ~8 km. The CECs survey during December of the same year was collected over a nested grid around SLC and along the host subglacial trough further north towards RIS, surveying a total of ~1050 km. During December 2017 the CECs radar survey acquired a total of ~700 km of RES data along the same trough. We assume the same uncertainties as Bedmap2 for the region beyond Ellsworth Subglacial Highland. asNeeded completed