Table A3.
Data on the LImonant, LImongre, LIyrant or LIyrgre Tables needed to capture the dynamical ice sheet model realm. These fields are saved on the ice sheet grid and contain monthly or yearly output. Tier indicate priority of variable: Mandatory (1), Desirable (2), Experimental (3). These variables are requested for models participating in the XXX-withism, ism-XXX-self and ism-XXX-std experiments (Table 2). Flux variables are defined positive when the process adds mass or energy to the ice sheet and negative otherwise.
| Long name (netCDF) | Units | Standard name (CF) | Tier |
|---|---|---|---|
| Ice sheet altitude | m | surface_altitude | 1 |
| Ice sheet thickness | m | land_ice_thickness | 1 |
| Bedrock altitude | m | bedrock_altitude | 1 |
| Bedrock geothermal heat flux | W m−2 | upward_geothermal_heat_flux_at_ground_level_in_land_ice | 3 |
| Land ice calving flux | kg m−2 s−1 | land_ice_specific_mass_flux_due_to_calving | 3 |
| Land ice vertical front mass balance flux | kg m−2 s−1 | land_ice_specific_mass_flux_due_to_calving_and_ice_front_melting | 2 |
| Surface mass balance and its components | kg m−2 s−1 | see Table A1 | 1 |
| Basal mass balance of grounded ice sheet | kg m−2 s−1 | land_ice_basal_specific_mass_balance_flux | 2 |
| Basal mass balance of floating ice shelf | kg m−2 s−1 | land_ice_basal_specific_mass_balance_flux | 2 |
| X-component of land ice surface velocity | m yr−1 | land_ice_surface_x_velocity | 1 |
| Y-component of land ice surface velocity | m yr−1 | land_ice_ surface_y_velocity | 1 |
| Z-component of land ice surface velocity | m yr−1 | land_ice_ surface_upward_velocity | 2 |
| X-component of land ice basal velocity | m yr−1 | land_ice_basal_x_velocity | 1 |
| Y-component of land ice basal velocity | m yr−1 | land_ice_basal_y_velocity | 1 |
| Z-component of land ice basal velocity | m yr−1 | land_ice_basal_upward_velocity | 2 |
| X-component of land ice vertical mean velocity | m yr−1 | land_ice_vertical_mean_x_velocity | 2 |
| Y-component of land ice vertical mean velocity | m yr−1 | land_ice_vertical_mean_y_velocity | 2 |
| Land ice basal drag | Pa | magnitude_of_basal_drag_at_land_ice_base | 3 |
| Surface temperature | K | surface_temperature | 1 |
| Temperature at the top of ice sheet model | K | temperature_at_top_of_ice_sheet_model | 1 |
| Basal temperature of grounded ice sheet | K | temperature_at_base_of_ice_sheet_model | 1 |
| Basal temperature of floating ice shelf | K | temperature_at_base_of_ice_sheet_model | 1 |
| Land ice area fraction | 1 | land_ice_area_fraction | 1 |
| Grounded ice area fraction | 1 | grounded_ice_sheet_area_fraction | 1 |
| Floating ice sheet area fraction | 1 | floating_ice_sheet_area_fraction | 1 |
| Surface snow area fraction | 1 | surface_snow_area_fraction | 2 |
|
Scalar outputs/Integrated measures | |||
| Ice mass | kg | land_ice_mass | 2 |
| Ice mass not displacing sea water | kg | land_ice_mass_not_displacing_sea_water | 2 |
| Area covered by grounded ice | m2 | grounded_land_ice_area | 3 |
| Area covered by floating ice | m2 | floating_ice_shelf_area | 3 |
| Total SMB flux | kg s−1 | tendency_of_land_ice_mass_due_to_surface_mass_balance | 3 |
| Total BMB flux | kg s−1 | tendency_of_land_ice_mass_due_to_basal_mass_balance | 3 |
| Total calving flux | kg s−1 | tendency_of_land_ice_mass_due_to_calving | 3 |