Abstract:
This gridded dataset provides geometry (ice thickness and bedrock topography) covering the Pine Island Glacier catchment. It has been created using the principle of mass conservation, given observed fields of velocity, surface elevation change and surface mass balance, together with sparse ice thickness data measured along airborne radar flight-lines.
Previous ice flow modelling studies show that gridded geometry products that use traditional interpolation techniques (e.g. Bedmap2) can result in a spurious thickening tendency near the grounding line of Pine Island Glacier. Removing the cause of this thickening signal, in order to more accurately model ice flow dynamics, has been the motivation for creating a new geometry that is consistent with the conservation of mass.
This data was funded by a PhD project within the iSTAR-C programme (with NERC grant reference NE/J005738/1).
Keywords:
Bed elevation, Ice streams, Ice thickness, Mass conservation
Nias, I. (2018). Mass-conserved ice sheet geometry of Pine Island Glacier, West Antarctica (Version None) [Data set]. Polar Data Centre, Natural Environment Research Council, UK. https://doi.org/10.5285/27ee63a1-b71d-4e35-9eaa-429c7d8c1f89
| Access Constraints: | No restrictions apply. |
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| Use Constraints: | This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v.3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ |
| Creation Date: | 2018-02-05 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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| Personnel: | |
| Name | UK PDC |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Ms Isabel Nias |
| Role(s) | Investigator, Technical Contact |
| Organisation | University of Bristol |
| Name | Dr Stephen Cornford |
| Role(s) | Investigator |
| Organisation | Swansea University |
| Name | Prof Antony Payne |
| Role(s) | Investigator |
| Organisation | University of Bristol |
| Parent Dataset: | N/A |
| Reference: | Nias, I.J., Cornford, S.L., Payne, A.J. (in review) New mass-conserving bedrock topography for Pine Island Glacier impacts on simulated decadal rates of mass loss. Geophysical Research Letters. | |
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| Quality: | Resolution: 1000 m grid spacing projected in Antarctic Polar Stereographic projection, latitude of true scale -71 degrees south, datum WGS84. Extent: Top: 119500 m Left: -1831500 m Right: -936500 m Bottom: -391500 m |
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| Lineage: | See referenced publication for details. | |
| Spatial Coverage: | |
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| Latitude | |
| Southernmost | -81.4 |
| Northernmost | -72.9 |
| Longitude | |
| Westernmost | -112.7 |
| Easternmost | -82.7 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Pine Island Glacier |
| Data Storage: | The file is approximately 4MB and is in NetCDF format. The data contains fields for topography (m above sea level) and ice thickness (m). |
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