Abstract:
Two maps of surface elevation change for Thwaites Glacier, West Antarctica. Change is in metres between 2013-12-21 and 2017-07-11, and between 2017-07-11 and 2020-11-02.
The work was funded by NERC projects NE/P011365/1 and NE/S006605/1.
Keywords:
ITGC, Thwaites Glacier, ice surface elevation, thinning
Bevan, S., Luckman, A., & Benn, D. (2021). Thwaites Glacier ice surface elevation change, December 2013 to July 2017, and July 2017 to November 2020 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/df8c4ac0-1723-43ae-ad48-d02d58699f32
| Access Constraints: | No restrictions apply. |
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| Use Constraints: | Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
| Creation Date: | 2021-05-25 |
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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, Technical Contact |
| Organisation | Swansea University |
| Name | Adrian Luckman |
| Role(s) | Investigator |
| Organisation | Swansea University |
| Name | Douglas Benn |
| Role(s) | Investigator |
| Organisation | University of St Andrews |
| Parent Dataset: | N/A |
| Reference: | Bevan, S. L., Luckman, A. J., Benn, D. I., Adusumilli, S., and Crawford, A.: Brief communication: Thwaites Glacier cavity evolution, The Cryosphere, 15, 3317-3328, https://doi.org/10.5194/tc-15-3317-2021, 2021. Liu, H., K. C. Jezek, B. Li, and Z. Zhao. 2015. Radarsat Antarctic Mapping Project Digital Elevation Model, Version 2. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/8JKNEW6BFRVD. |
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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, the difference therefore has an estimated uncertainty of ±4.2 m. | |
| Lineage: | The initial digital elevation models (DEMs) were created via an interferometric analysis of TanDEM-X satellite system synthetic aperture radar data. Phase-scaling utilised the supplied orbit data. The DEMs were geocoded first using the RAMP DEM (Liu et al., 2015) and then, iteratively, using the DEMs themselves. The DEMs were calibrated in the vertical using an ICESat-2 point at (107.49°W, 75.47°S) acquired on 2018-11-05. Processing is described fully in the reference paper. | |
| Temporal Coverage: | |
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| Start Date | 2013-12-01 |
| End Date | 2020-11-30 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -77 |
| Northernmost | -74 |
| Longitude | |
| Westernmost | -109 |
| Easternmost | -106 |
| 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 |
| Sensor(s): |
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| Source(s): |
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| Data Collection: | Interferometric analysis was carried out using Gamma Remote Sensing software 20190603. |
| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 385.0 MB |
| Distribution Format | TIFF |
| Fees | N/A |
| Data Storage: | The dataset comprises two GeoTIFFs. The data are in a Polar Stereographic projection (EPSG:3031) covering Thwaites Glacier. Top left corner is (-1548552 m east, -502688 north). 50.008 km wide (6251 pixels), 64.112 km long (8014 lines). Horizontal spatial resolution is 8 x 8 m. |