Full Record - Subglacial overdeepenings in selected valley glaciers in Central Himalayas, New Zealand Southern Alps, European Alps, Peruvian Andes and Alaska, 2006-2018

Subglacial overdeepenings in selected valley glaciers in Central Himalayas, New Zealand Southern Alps, European Alps, Peruvian Andes and Alaska, 2006-2018

GB/NERC/BAS/PDC/02052

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.

Citation:
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 Data

GET DATA

http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=61ab53f8-5eaa-447b-a35a-bd1ae10c3973

PROJECT HOME PAGE

https://gtr.ukri.org/projects?ref=NE/S013318/1

REFERENCE MATERIALS

License

Access:	No restrictions apply.
Use:	Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

Authors

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

Basic Information

Creation Date:	2025-04-30
Dataset Progress:	Complete
Dataset Language:	English
ISO Topic Categories:	Elevation Imagery/Base Maps/Earth Cover Inland Waters
Parameters:	Cryosphere > Glaciers/Ice Sheets > Glacier Elevation/Ice Sheet Elevation Cryosphere > Glaciers/Ice Sheets > Glacier Thickness/Ice Sheet Thickness Cryosphere > Glaciers/Ice Sheets > Glacier Topography/Ice Sheet Topography Cryosphere > Glaciers/Ice Sheets > Glaciers Land Surface > Geomorphology > Glacial Landforms/Processes

Additional Information

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
Quality:	Some overdeepenings that are smaller than the pixel size might not have been estimated. Spatial resolution is 50 m x 50 m.
Lineage/Methodology:	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.

Extent

Temporal Coverage:
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.

Storage

Distribution:
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.

Discovery Metadata System