Dataset for "On non-dimensional forms of basal sliding laws and flow laws for ice-sheet and glacier modelling"

1 Dataset for “On non-dimensional forms of basal sliding laws and flow laws for ice-sheet and glacier modelling” (Journal of Glaciology, submitted) – README – 2025-10-17 Ralf Greve1,2 1 Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan 2 Arctic Research Center, Hokkaido University, Sapporo, Japan Three model experiments (for details see the paper, Sect. 4) Similar to experiment H of the EISMINT Phase 2 Simplified Geometry Experiments (Payne and others, 2000, J. Glaciol. 46, 227-238, doi: 10.3189/172756500781832891). • Exp. H1: Weertman sliding with (p,q) = (1,0), Nye–Glen flow law with n = 3. • Exp. H2: Weertman–Budd sliding with (p,q) = (3,2), Nye–Glen flow law with n = 3. • Exp. H3: Weertman sliding with (p,q) = (1,0), Nye–Glen flow law with n = 4. Run with SICOPOLIS v25 (revision 2488194da of 2025-06-30), compiler gfortran 13.3.1. The SICOPOLIS run-specs header files are contained in the archive ‘run_specs_headers.zip’. Variables The variable names follow closely the ISMIP6/7 convention (e.g., https://theghub.org/groups/ismip6/wiki/ISMIP6-Projections-Greenland). However, years are used instead of seconds as the time unit (1 a = 31,556,925.445 s). 2D state variables (in archives ‘expH1.zip’, ‘expH2.zip’, ‘expH3.zip’) lithk – Ice thickness (m) xvelsurf – Surface velocity in x (m a−1) yvelsurf – Surface velocity in y (m a−1) zvelsurf – Surface velocity in z (m a−1) horvelsurf – Horizontal surface velocity (m a−1) 2 xvelbase – Basal velocity in x (m a−1) yvelbase – Basal velocity in y (m a−1) zvelbase – Basal velocity in z (m a−1) horvelbase – Horizontal basal velocity (m a−1) xvelmean – Mean velocity in x (m a−1) yvelmean – Mean velocity in y (m a−1) horvelmean – Horizontal mean velocity (m a−1) litemptop – Surface temperature (K) litempbot – Basal temperature (K) strbasemag – Basal drag (Pa) sftgif – Land ice area fraction (–) These variables are provided as snapshots for the times t = 5 ka, 25 ka, 100 ka (final time). Time variable: ‘time’. Scalar state variables (in archives ‘expH1.zip’, ‘expH2.zip’, ‘expH3.zip’) lim – Total ice mass (kg) iareagr – Grounded ice area (m2) These variables are provided as snapshots every 10 years: t = 0.01 ka, 0.02 ka, …, 100 ka. Time variable: ‘time’. Note For further details on the variables, see the metadata in the netCDF files (e.g., by Linux command ‘ncdump -h’ or MATLAB command ‘ncdisp’).