----------------------------
Data files grl_bm5_xx_yyy.nc
----------------------------

xx:  Horizontal resolutions 04/05/08/10/16/20/40 km.
yyy: Present-day ice surface zs, ice base zb,
     lithosphere surface zl, ice-land-ocean mask,
     maximum-extent mask mask_maxextent
     -> common file 'topo',
     isostatically relaxed lithosphere surface zl0_llra/zl0_elra.

Geometry of the Greenland ice sheet by Morlighem et al. (2017, 2022)
(BedMachine Greenland v5).
Processing and downsampling by Ralf Greve.

Non-Greenlandic land and continental shelves
(Ellesmere Island, Svalbard, Iceland, Baffin Island)
changed to deep ocean.

References
----------

Morlighem, M. and 31 others. 2017.
BedMachine v3: Complete bed topography and ocean bathymetry mapping of
Greenland from multibeam echo sounding combined with mass conservation.
Geophysical Research Letters 44 (21), 11051-11061,
doi: 10.1002/2017GL074954.

Morlighem, M. and others. 2022.
IceBridge BedMachine Greenland, Version 5.
NASA National Snow and Ice Data Center Distributed Active Archive Center,
Boulder, Colorado USA, doi: 10.5067/GMEVBWFLWA7X [accessed on 2022-10-03].
