Greenland ice sheet delineations to be used for the IMBIE assessment


Summary
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We provide delineations of the Greenland ice sheet and ice caps into seven distinct sectors (NE, NW, NO, CE, CW, SE, SW) to be used by all participants for the IMBIE assessment to allow for comparisons of ice sheet mass balance over common spatial domains
This shapefile is based on Mouginot & Rignot (2019) and the Randolph Glacier Inventory version 7 (RGI 7.0)


Data files
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For convenience of use, we provide the ice sheet delineations as a shapefile and as a NetCDF file.
All data files use spatial projection EPSG 3413.

1) A shapefile
IMBIE_GRIS_Regional_Delineations.cpg
IMBIE_GRIS_Regional_Delineations.dbf
IMBIE_GRIS_Regional_Delineations.prj
IMBIE_GRIS_Regional_Delineations.qmd
IMBIE_GRIS_Regional_Delineations.shp
IMBIE_GRIS_Regional_Delineations.shx
For each region, there are two polygons (one for the ice sheet and one for the peripheral glaciers and ice caps)

2) A netcdf file providing the region mask and ice sheet/ice cap mask on a 1km x 1km grid, 5km x 5km grid, and 10km x 10km grid
IMBIE_GRIS_Regional_Delineations_1km.nc
IMBIE_GRIS_Regional_Delineations_5km.nc
IMBIE_GRIS_Regional_Delineations_10km.nc


References
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Mouginot, J.; Rignot, E. Glacier Catchments/Basins for the Greenland Ice Sheet; UC Irvine Dash: Irvine, CA, USA, 2019. Online access: https://datadryad.org/dataset/doi:10.7280/D1WT11

RGI 7.0 Consortium, 2023. Randolph Glacier Inventory - A Dataset of Global Glacier Outlines, Version 7.0. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi:10.5067/f6jmovy5navz. Online access: https://doi.org/10.5067/f6jmovy5navz https://doi.org/10.5067/f6jmovy5navz
