Abstract:
This dataset consists of Digital Elevation Models (DEMs) of the surface elevation of Thwaites Glacier. The region covered includes the floating area of the fast-flowing main trunk of Thwaites Glacier, sometimes referred to as Thwaites West Ice Tongue. The DEMs are derived from TanDEM-X SAR data. There are 172 individual scenes that reveal the geometric evolution of this area between 2011 and 2022.
This work was supported by the NERC project CALISMO NE/P011365/1.
Keywords:
Amundsen sea, Digital Elevation Model, TanDEM-X, Thwaites glacier, West Antarctic Ice Sheet
Bevan, S., Luckman, A., & Holland, P. (2023). Digital Elevation Models of Thwaites Glacier main trunk (2011-2022) (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/24aef4f2-3bfc-4014-88e8-34644fdc71a3
| Access Constraints: | No restrictions apply. |
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| Use Constraints: | Data released under Open Government Licence V3.0: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
| Creation Date: | 2023-03-20 |
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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 Polar Data Centre |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Suzanne Bevan |
| Role(s) | Investigator |
| Organisation | Swansea University |
| Name | Adrian Luckman |
| Role(s) | Investigator |
| Organisation | Swansea University |
| Name | Dr Paul R Holland |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Parent Dataset: | N/A |
| Reference: | Bevan, S. L., Luckman, A. J., Benn, D. I., Adusumilli, S., & Crawford, A. (2021). Brief communication: Thwaites Glacier cavity evolution. The Cryosphere, 15(7), 3317-3328. doi:10.5194/tc-15-3317-2021. Holland, P.R., S.L. Bevan, and A.J. Luckman, submitted. Strong ocean melting feedback during the recent retreat of Thwaites Glacier. Geophysical Research Letters |
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| Quality: | Via comparison with ICESat-2 data and in consideration of orbit uncertainty, the original DEMs have an estimated vertical uncertainty of +/-3 m. This is fully documented in the accompanying paper. | |
| Lineage/Methodology: | We created a time series of 172 DEMs from June 2011 to April 2022 based on experimental SAR data from the TanDEM-X satellite system using Gamma Remote Sensing software. The processing is fully described in Bevan et al., 2021 (10.5194/tc-15-3317-2021). The data are provided on a Antarctic Polar stereographic grid (EPSG: 3031) as TIFF files. |
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| Temporal Coverage: | |
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| Start Date | 2011-06-22 |
| End Date | 2022-04-03 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -75.73 |
| Northernmost | -74.85 |
| Longitude | |
| Westernmost | -108.6 |
| Easternmost | -105.3 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Data Resolution: | |
| Latitude Resolution | N/A |
| Longitude Resolution | N/A |
| Horizontal Resolution Range | 1 meter - < 30 meters |
| Vertical Resolution | N/A |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Thwaites Glacier |
| Location | Southern Ocean |
| Detailed Location | Amundsen Sea |
| Source(s): |
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| Data Collection: | TanDEM-X satellite system. Gamma Remote Sensing software. |
| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 35 GB |
| Distribution Format | TIFF |
| Fees | N/A |
| Data Storage: | 172 files in .tif format. Total 35GB |