Abstract:
Datasets from the Resolving subglacial properties, hydrological networks and dynamic evolution of ice flow on the Greenland Ice Sheet (RESPONDER) project as published in the paper by Chudley et al. entitled "Controls on water storage and drainage in crevasses on the Greenland Ice Sheet".
This dataset consists of remotely sensed observations of water-filled crevasses across a marine-terminating sector of the west Greenland Ice Sheet between 2017 and 2019.The dataset presented here includes all data necessary to replicate the findings presented in the main paper, including UAV photogrammetry-derived raster data (producing a series of orthophotos and digital elevation models) and observations from satellite-derived data (Sentinel-2, ArcticDEM, and MEaSUREs Greenland velocity data) of crevasse presence, water presence, and estimates of surface stress.
This research was funded by the European Research Council as part of the RESPONDER project under the European Union's Horizon 2020 research and innovation program (Grant 683043). Tom Chudley was supported by a Natural Environment Research Council Doctoral Training Partnership Studentship (Grant NE/L002507/1).
Keywords:
Greenland, crevasses, glacier hydrology, ice sheet, remote sensing
Chudley, T., & Christoffersen, P. (2021). RESPONDER: Observations of crevasses, crevasse ponding, and surface stress across west Greenland, 2017 - 2019 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/c36c7744-9cf5-4c20-a7a3-a9222cad9f22
| 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: | 2021-05-14 |
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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 | Thomas R Chudley |
| Role(s) | Investigator, Technical Contact |
| Organisation | Scott Polar Research Institute, University of Cambridge |
| Name | Poul Christoffersen |
| Role(s) | Investigator |
| Organisation | Scott Polar Research Institute, University of Cambridge |
| Parent Dataset: | N/A |
| Reference: | Chudley, T. R., Christoffersen, P., Doyle, S. H., Dowling, T. P. F., Law, R., Schoonman, C. M., Bougamont, M., & Hubbard, B. (2021). Controls on water storage and drainage in crevasses on the Greenland Ice Sheet. Journal of Geophysical Research: Earth Surface. https://doi.org/10.1029/2021JF006287. Chudley, T. R., Christoffersen, P., Doyle, S. H., Abellan, A., and Snooke, N.: High-accuracy UAV photogrammetry of ice sheet dynamics with no ground control, The Cryosphere, 13, 955-968, https://doi.org/10.5194/tc-13-955-2019, 2019. |
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| Quality: | We assign UAV-derived orthophoto and DEM data uncertainties of ±0.12 m horizontally (~1.1x the ground sampling distance) and ±0.14 m vertically (~1.3x the ground sampling distance), following Chudley et al. (Cryosphere, 13, 955-968, 2019). | |
| Lineage: | Water-filled pixels were identified at a seasonal timescale using 10 m resolution Sentinel-2 data, using an NDWI threshold to classify all pixels where water was observed, using an NDWI threshold, to occur more than twice between May-October. Crevasse-filled pixels were identified from the 3 m resolution ArcticDEM, classified where residuals between 50 m smoothed and raw elevation values were greater than 1 m. UAV data were collected and processed following Chudley et al. (Cryosphere, 13, 955-968, 2019), and classified using a random forest classifier. | |
| Temporal Coverage: | |
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| Start Date | 2017-05-01 |
| End Date | 2019-09-30 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | 70.269 |
| Northernmost | 71.16 |
| Longitude | |
| Westernmost | -51.277 |
| Easternmost | -49.458 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Location: | |
| Location | Greenland |
| Detailed Location | West Greenland Ice Sheet |
| Data Collection: | UAV: Custom-built Skywalker X8 fixed-wing UAV running ArduPlane autopilot software, collecting imagery with a Sony α6000 and GPS data with an Emlid Reach receiver. Images processed in Agisoft Metashape v 1.4.3. |
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| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 9.8 GB |
| Distribution Format | TIFF |
| Fees | N/A |
| Data Storage: | Directory 'satellite' contains geotiffs of the crevasse maps, water maps, and stress estimates derived from satellite observations. Directory 'uav' contains geotiffs of the orthophotos, digital elevation models, and classified surface maps derived from the UAV Structure-from-Motion photogrammetry. The 'README' file in the top level directory lists file name conventions, formats and units in detail. Resolution: Satellite data: 3 m (raw crevasse), 10 m (raw water), and 200 m (crevasse and water fraction; stress estimates). UAV data: 15 cm (orthophotos), 20 cm (DEM and classified data). |