Abstract:
Thwaites Glacier, West Antarctica. A time series of 156 profiles of ice surface elevation along a flowline based on the mean flow direction. The flowline passes through a region of large elevation change that took place between 2014 and 2017.
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 profiles from June 2011 to November 2020 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/ede3520b-cf1c-4979-afcc-94ac266bb61a
| Access Constraints: | No restrictions apply. |
|---|---|
| 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 |
|---|---|
| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
|
| Parameters: |
|
| 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. |
|
|---|---|---|
| Quality: | Via comparison with ICESat-2 data and in consideration of orbit uncertainty, the original DEMs have an estimated vertical uncertainty of ±3 m. | |
| Lineage: | The profiles were extracted from digital elevation models (DEMs) based on an interferometric analysis of TanDEM-X satellite system synthetic aperture radar (SAR) data. Phase-scaling of the interferograms 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. Heights are relative to the WGS84 ellipsoid. Processing is described fully in the reference paper. | |
| Temporal Coverage: | |
|---|---|
| Start Date | 2011-06-22 |
| End Date | 2020-11-02 |
| 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 | Along the western flank of the fast-flowing core of Thwaites Glacier. |
| Sensor(s): |
|
|---|---|
| Source(s): |
|
| Data Collection: | Interferometric analysis was carried out using Gamma Remote Sensing software 20190603. |
| Distribution: | |
|---|---|
| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 20.0 MB |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | The dataset comprises 89 tabular text files. The data are in a Polar Stereographic projection (EPSG:3031). Columns are easting (m), northing (m), elevation (m). Profiles vary in length but are around 35 km long depending on the spatial coverage of the source DEM. Sampling is every 8 m which is the spatial resolution of the underlying DEMs. |