Abstract:
The dataset contains depth information (in meters) for pixels of subglacial overdeepenings with an area of 10000 m2 or larger, across five regions: Alaska, European Alps, New Zealand Southern Alps, the Central Himalayas, and the Peruvian Andes. These overdeepenings were derived by subtracting ice thickness data from Digital Elevation Models (DEMs) that describe the surface topography. Five ice thickness models were used for all regions: Farinotti's Ensemble, GlabTop2, Huss and Farinotti were downloaded from Farinotti et al., (2019). OGGM's ice thickness was downloaded from Farinotti et al., 2019 for all regions except for the Himalayas where it was generated by keeping the default same. Millan's ice thickness was downloaded from Millan et al., (2022). The primary DEM used was the ALOS PALSAR DEM. For Central Himalayas, in addition to ALOS PALSAR, three other DEMs were used: ASTER, SRTM, and Copernicus.
NERC standard grant NE/S013318/1.
Keywords:
landscape evolution, multi-model, overdeepenings, subglacial, valley glaciers
Nayak, I., Quincey, D., Carrivick, J., & Sutherland, J. (2025). Subglacial overdeepenings in selected valley glaciers in Central Himalayas, New Zealand Southern Alps, European Alps, Peruvian Andes and Alaska, 2006-2018 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/61ab53f8-5eaa-447b-a35a-bd1ae10c3973
| 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: | 2025-04-30 |
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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 | Ipseeta Nayak |
| Role(s) | Investigator, Technical Contact |
| Organisation | University of Leeds |
| Name | Duncan Quincey |
| Role(s) | Investigator |
| Organisation | University of Leeds |
| Name | Jonathan Carrivick |
| Role(s) | Investigator |
| Organisation | University of Leeds |
| Name | Jenna Sutherland |
| Role(s) | Investigator |
| Organisation | Leeds Beckett University |
| Parent Dataset: | N/A |
| Reference: | Farinotti, D., Huss, M., Fürst, J.J. et al. A consensus estimate for the ice thickness distribution of all glaciers on Earth. Nat. Geosci. 12, 168-173 (2019). https://doi.org/10.1038/s41561-019-0300-3 Millan, R., Mouginot, J., Rabatel, A. et al. Ice velocity and thickness of the world's glaciers. Nat. Geosci. 15, 124-129 (2022). https://doi.org/10.1038/s41561-021-00885-z |
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| Quality: | Some overdeepenings that are smaller than the pixel size might not have been estimated. Spatial resolution is 50 m x 50 m. | |
| Lineage: | ArcGIS Pro version 3.10 was used for data handling and processing. Ice thicknesses, in raster format, were subtracted from the DEM using the raster calculator in ArcGIS to derive glacier bed topography. This bed topography was filled using the ArcGIS fill tool. The original bed topography was then subtracted from the filled bed topography using ArcGIS raster calculator to estimate overdeepening locations, areas and depths. | |
| Temporal Coverage: | |
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| Start Date | 2006-01-01 |
| End Date | 2018-01-01 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | 27.555 |
| Northernmost | 27.943 |
| Longitude | |
| Westernmost | 88.075 |
| Easternmost | 88.63 |
| Altitude | |
| Min Altitude | 3866.59 m |
| Max Altitude | 7253.96 m |
| Depth | |
| Min Depth | N/A |
| Max Depth | -291.3 m |
| Latitude | |
| Southernmost | -14.192 |
| Northernmost | -13.47 |
| Longitude | |
| Westernmost | -71.347 |
| Easternmost | -70.258 |
| Altitude | |
| Min Altitude | 4682.91 m |
| Max Altitude | 5639.88 m |
| Depth | |
| Min Depth | N/A |
| Max Depth | -311.92 m |
| Latitude | |
| Southernmost | -44.649 |
| Northernmost | -44.352 |
| Longitude | |
| Westernmost | 168.339 |
| Easternmost | 168.822 |
| Altitude | |
| Min Altitude | 806.99 m |
| Max Altitude | 2170.15 m |
| Depth | |
| Min Depth | N/A |
| Max Depth | -353.83 m |
| Latitude | |
| Southernmost | 55.539 |
| Northernmost | 56.098 |
| Longitude | |
| Westernmost | -130.021 |
| Easternmost | -129.296 |
| Altitude | |
| Min Altitude | 588.19 m |
| Max Altitude | 2297.20 m |
| Depth | |
| Min Depth | N/A |
| Max Depth | -544.934 m |
| Latitude | |
| Southernmost | 47.019 |
| Northernmost | 47.061 |
| Longitude | |
| Westernmost | 11.635 |
| Easternmost | 12.789 |
| Altitude | |
| Min Altitude | 2213.24 m |
| Max Altitude | 3448.44 m |
| Depth | |
| Min Depth | N/A |
| Max Depth | -109.113 m |
| Data Resolution: | |
| Latitude Resolution | N/A |
| Longitude Resolution | N/A |
| Horizontal Resolution Range | 30 meters - < 100 meters |
| Vertical Resolution | N/A |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Global |
| Detailed Location | Alaska,Central Himalayas,Peruvian Andes,European Alps,New Zealand Southern Alps |
| Data Collection: | Data were processed using ArcGIS pro version 3.10. |
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| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 228 MB |
| Distribution Format | TIFF |
| Fees | N/A |
| Data Storage: | The dataset consists of 45 geoTIFFs along with auxiliary files. |