61ab53f8-5eaa-447b-a35a-bd1ae10c3973 eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2025-04-30 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Subglacial overdeepenings in selected valley glaciers in Central Himalayas, New Zealand Southern Alps, European Alps, Peruvian Andes and Alaska, 2006-2018 2025-04-30 creation 2025-04-30 revision 2025-04-30 publication 2025-04-30 released 1.0 https://doi.org/10.5285/61ab53f8-5eaa-447b-a35a-bd1ae10c3973 doi GB/NERC/BAS/PDC/02052 https://data.bas.ac.uk/ NE/S013318/1 award Please cite this item as: 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 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. No credit. completed Nayak, Ipseeta University of Leeds Researcher author Quincey, Duncan University of Leeds Researcher author Carrivick, Jonathan University of Leeds Researcher author Sutherland, Jenna Leeds Beckett University Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Elevation/Ice Sheet Elevation EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Thickness/Ice Sheet Thickness EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Topography/Ice Sheet Topography EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glaciers EARTH SCIENCE > Land Surface > Geomorphology > Glacial Landforms/Processes theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher landscape evolution multi-model overdeepenings subglacial valley glaciers theme Alaska,Central Himalayas,Peruvian Andes,European Alps,New Zealand Southern Alps Global place Elevation Land cover theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions Data supplied under Open Government Licence v3.0 otherRestrictions No restrictions apply. url url largerWorkCitation url url crossReference doi doi crossReference doi doi crossReference textTable eng utf8 elevation imageryBaseMapsEarthCover inlandWaters 88.075 88.63 27.555 27.943 2006-01-01 2018-01-01 3866.59 7253.96 urn:ogc:def:crs:EPSG::5714 MSL height Not specific to any location or epoch. Hydrography. It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor image/tiff text/plain bytes 238341325 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=61ab53f8-5eaa-447b-a35a-bd1ae10c3973 WWW:LINK-1.0-http--link Get Data Download data download bytes 238341325 http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=61ab53f8-5eaa-447b-a35a-bd1ae10c3973 WWW:LINK-1.0-http--link Get Data Download data download dataset 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. Data collection: Data were processed using ArcGIS pro version 3.10. Data quality: Some overdeepenings that are smaller than the pixel size might not have been estimated. Spatial resolution is 50 m x 50 m. asNeeded completed