Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica, 1977-2017
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Model (DEM) from Ellsworth Subglacial Highlands (ESH) was created from previously gridded bed elevation data and new unpublished radar data.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.
Simple
- Alternate title
- Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01401
- Date (Publication)
- 2020-10-06
- Identifier
- http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01401
- Maintenance and update frequency
- unknown Unknown
- Keywords
-
- NDGO0001
- NERC OAI Harvesting
-
- NERC_DDC
- GCMD Parameter Valids
-
- 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
- BAS Free-text keywords
-
- Ellsworth Mountains
- Pine Island Glacier
- Rutford Ice Stream
- Thwaites Glacier
- subglacial hydrology
- Use limitation
- This data is supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- This data is supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
- Metadata language
- EnglishEnglish
- Topic category
-
- Climatology, meteorology, atmosphere
- Elevation
- Geoscientific information
- Imagery base maps earth cover
- Begin date
- 1977-01-01
- End date
- 2017-12-19
- Reference system identifier
- OGP / urn:ogc:def:crs:EPSG::4326
- Distribution format
-
- OnLine resource
- https://doi.org/10.1029/2011RG000361
- Hierarchy level
- dataset Dataset
Domain consistency
- Measure identification
- INSPIRE / Conformity_001
Conformance result
- Date
- Explanation
- See the referenced specification
- Pass
- No
- Statement
- 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.
- File identifier
- GB_NERC_BAS_PDC_01401 XML
- Metadata language
- EnglishEnglish
- Hierarchy level
- dataset Dataset
- Date stamp
- 2020-10-06
- Metadata standard name
- NERC profile of ISO19115:2003
- Metadata standard version
- 1.0