Alpine ice sheet erosion potential aggregated variables

These data contain domain-integrated and time-integrated model output variables presented in the reference below or otherwise relevant to last glacial cycle glacier erosion in the Alps.

Reference:

• J. Seguinot and I. Delanay. Last glacial cycle glacier erosion potential in the Alps, submitted to Earth Surface Dynamics Discussions, 2021.

File names:

alpero.{1km|2km}.{epic|grip|md01}.{cp|pp}.agg.nc

• Horizontal resolution:
  • 1km: 1 km horizontal resolution
  • 2km: 2 km horizontal resolution
• Temperature forcing:
  • epic: EPICA ice core temperature forcing
  • grip: GRIP ice core temperature forcing
  • md01: MD01-2444 core temperature forcing
• Precipitation forcing:
  • cp: constant precipitation
  • pp: palaeo-precipitation reduction

Variables:

• Coordinate variables:
  • x: X-coordinate in Cartesian system
  • y: Y-coordinate in Cartesian system
  • lon: longitude
  • lat: latitude
  • time: time
  • age: model age
  • z: elevation band midpoints
  • d: distance along transect
• Glacier erosion variables:
  • coo2020_cumu: Cook et al. (2020) cumulative glacial erosion potential
  • coo2020_rate: Cook et al. (2020) domain total volumic erosion rate
  • coo2020_hyps: Cook et al. (2020) erosion rate geometric mean
  • coo2020_rhin: Cook et al. (2020) rhine transect erosion rate
  • her2015_cumu: Herman et al. (2015) cumulative glacial erosion potential
  • her2015_rate: Herman et al. (2015) domain total volumic erosion rate
  • her2015_hyps: Herman et al. (2015) erosion rate geometric mean
  • her2015_rhin: Herman et al. (2015) rhine transect erosion rate
  • hum1994_cumu: Humphrey and Raymond (1994) cumulative glacial erosion potential
  • hum1994_rate: Humphrey and Raymond (1994) domain total volumic erosion rate
  • hum1994_hyps: Humphrey and Raymond (1994) erosion rate geometric mean
  • hum1994_rhin: Humphrey and Raymond (1994) rhine transect erosion rate
  • kop2015_cumu: Koppes et al. (2015) cumulative glacial erosion potential
  • kop2015_rate: Koppes et al. (2015) domain total volumic erosion rate
  • kop2015_hyps: Koppes et al. (2015) erosion rate geometric mean
  • kop2015_rhin: Koppes et al. (2015) rhine transect erosion rate
• Other variables:
  • cumu_sliding: cumulative basal motion
  • glacier_time: total ice cover duration
  • warmbed_time: temperate-based ice cover duration
  • glacier_area: glacierized area
  • volumic_lift: volumic bedrock uplift
  • warmbed_area: temperate-based ice cover area

Data format:

The data use compressed netCDF format. For quick inspection I recommend ncview. Conversion to GeoTIFF (and other GIS formats) can be achieved with e.g. GDAL::

gdal_translate NETCDF:filename.nc:variable filename.variable.tif

The list of variables (subdatasets) can be obtained from ncdump or gdalinfo. To convert all variables to separate files use:

gdalinfo $filename | grep NETCDF | cut -d '=' -f 2 |
    egrep -v '(lat|lon|time_bounds)' | while read sub
do gdal_translate $sub ${filename%.nc}.${sub##*:}.tif
done

Variable long names, units, PISM configuration parametres and additional information are contained within the netCDF metadata. Also see glacial cycle aggregated and continuous variables.

Changes:

• Version 2:
  • Add variable for glacierized area within 100-m elevation band.
  • Use 100-m instead of 10-m elevation bands for erosion rate.
• Version 1:
  • Initial version.