! This file was written by the model and records all non-layout or debugging parameters used at run-time. ! === module ice_model === SPECIFIED_ICE = False ! [Boolean] default = False ! If true, the ice is specified and there is no dynamics. CGRID_ICE_DYNAMICS = False ! [Boolean] default = False ! If true, use a C-grid discretization of the sea-ice ! dynamics; if false use a B-grid discretization. USE_SLAB_ICE = False ! [Boolean] default = False ! If true, use the very old slab-style ice. SINGLE_ICE_STATE_TYPE = True ! [Boolean] default = True ! If true, the fast and slow portions of the ice use a ! single common ice_state_type. Otherwise they point to ! different ice_state_types that need to be explicitly ! copied back and forth. EULERIAN_TSURF = False ! [Boolean] default = True ! If true, use previous calculations of the ice-top surface ! skin temperature for tsurf at the start of atmospheric ! time stepping, including interpolating between tsurf ! values from other categories in the same location. ICE_OCEAN_STRESS_STAGGER = "B" ! default = "B" ! A case-insensitive character string to indicate the ! staggering of the stress field on the ocean that is ! returned to the coupler. Valid values include ! 'A', 'B', or 'C', with a default that follows the ! value of CGRID_ICE_DYNAMICS. RHO_OCEAN = 1030.0 ! [kg m-3] default = 1030.0 ! The nominal density of sea water as used by SIS. RHO_ICE = 905.0 ! [kg m-3] default = 905.0 ! The nominal density of sea ice as used by SIS. RHO_SNOW = 330.0 ! [kg m-3] default = 330.0 ! The nominal density of snow as used by SIS. G_EARTH = 9.8 ! [m s-2] default = 9.8 ! The gravitational acceleration of the Earth. MOMENTUM_ROUGH_ICE = 1.0E-04 ! [m] default = 1.0E-04 ! The default momentum roughness length scale for the ocean. HEAT_ROUGH_ICE = 1.0E-04 ! [m] default = 1.0E-04 ! The default roughness length scale for the turbulent ! transfer of heat into the ocean. CONSTANT_COSZEN_IC = 0.0 ! [nondim] default = -1.0 ! A constant value to use to initialize the cosine of ! the solar zenith angle for the first radiation step, ! or a negative number to use the current time and astronomy. DT_RADIATION = 2.88E+04 ! [s] default = 2.88E+04 ! The time step with which the shortwave radiation and ! fields like albedos are updated. Currently this is only ! used to initialize albedos when there is no restart file. ICE_KMELT = 240.0 ! [W m-2 K-1] default = 240.0 ! A constant giving the proportionality of the ocean/ice ! base heat flux to the tempature difference, given by ! the product of the heat capacity per unit volume of sea ! water times a molecular diffusive piston velocity. SNOW_CONDUCT = 0.31 ! [W m-1 K-1] default = 0.31 ! The conductivity of heat in snow. ICE_BOUNDS_CHECK = True ! [Boolean] default = True ! If true, periodically check the values of ice and snow ! temperatures and thicknesses to ensure that they are ! sensible, and issue warnings if they are not. This ! does not change answers, but can increase model run time. FIRST_DIRECTION = 0 ! default = 0 ! An integer that indicates which direction goes first ! in parts of the code that use directionally split ! updates, with even numbers (or 0) used for x- first ! and odd numbers used for y-first. ICE_SEES_ATMOS_WINDS = True ! [Boolean] default = True ! If true, the sea ice is being given wind stresses with ! the atmospheric sign convention, and need to have their ! sign changed. APPLY_SLP_TO_OCEAN = False ! [Boolean] default = False ! If true, apply the atmospheric sea level pressure to ! the ocean. PASS_STRESS_MAG_TO_OCEAN = False ! [Boolean] default = False ! If true, provide the time and area weighted mean magnitude ! of the stresses on the ocean to the ocean. MIN_H_FOR_TEMP_CALC = 0.0 ! [m] default = 0.0 ! The minimum ice thickness at which to do temperature ! calculations. DO_ICEBERGS = False ! [Boolean] default = False ! If true, call the iceberg module. ADD_DIURNAL_SW = True ! [Boolean] default = False ! If true, add a synthetic diurnal cycle to the shortwave ! radiation. DO_SUN_ANGLE_FOR_ALB = False ! [Boolean] default = False ! If true, find the sun angle for calculating the ocean ! albedo within the sea ice model. DO_RIDGING = False ! [Boolean] default = False ! If true, call the ridging routines. RESTARTFILE = "ice_model.res.nc" ! default = "ice_model.res.nc" ! The name of the restart file. FAST_ICE_RESTARTFILE = "ice_model.res.nc" ! default = "ice_model.res.nc" ! The name of the restart file for those elements of the ! the sea ice that are handled by the fast ice PEs. WRITE_GEOM = 1 ! default = 1 ! If =0, never write the geometry and vertical grid files. ! If =1, write the geometry and vertical grid files only for ! a new simulation. If =2, always write the geometry and ! vertical grid files. Other values are invalid. INTERPOLATE_FLUXES = True ! [Boolean] default = True ! If true, interpolate a linearized version of the fast ! fluxes into arealess categories. REDO_FAST_ICE_UPDATE = False ! [Boolean] default = False ! If true, recalculate the thermal updates from the fast ! dynamics on the slowly evolving ice state, rather than ! copying over the slow ice state to the fast ice state. NCAT_ICE = 5 ! [nondim] default = 5 ! The number of sea ice thickness categories. NK_ICE = 4 ! [nondim] default = 4 ! The number of layers within the sea ice. NK_SNOW = 1 ! [nondim] default = 1 ! The number of layers within the snow atop the sea ice. H_TO_KG_M2 = 1.0 ! [kg m-2 H-1] default = 1.0 ! A constant that translates thicknesses from the model's ! internal units of thickness to kg m-2. MIN_OCEAN_PARTSIZE = 0.0 ! [nondim] default = 0.0 ! The minimum value for the fractional open-ocean area. ! This can be 0, but for some purposes it may be useful ! to set this to a miniscule value (like 1e-40) that will ! be lost to roundoff during any sums so that the open ! ocean fluxes can be used in with new categories. ! === module MOM_domains === REENTRANT_X = True ! [Boolean] default = True ! If true, the domain is zonally reentrant. REENTRANT_Y = False ! [Boolean] default = False ! If true, the domain is meridionally reentrant. TRIPOLAR_N = True ! [Boolean] default = False ! Use tripolar connectivity at the northern edge of the ! domain. With TRIPOLAR_N, NIGLOBAL must be even. NIGLOBAL = 120 ! ! The total number of thickness grid points in the ! x-direction in the physical domain. With STATIC_MEMORY_ ! this is set in SIS2_memory.h at compile time. NJGLOBAL = 84 ! ! The total number of thickness grid points in the ! y-direction in the physical domain. With STATIC_MEMORY_ ! this is set in SIS2_memory.h at compile time. ! === module MOM_hor_index === ! Sets the horizontal array index types. ! === module SIS_initialize_fixed === INPUTDIR = "INPUT" ! default = "." ! The directory in which input files are found. ! === module MOM_grid_init === GRID_CONFIG = "mosaic" ! ! A character string that determines the method for ! defining the horizontal grid. Current options are: ! mosaic - read the grid from a mosaic (supergrid) ! file set by GRID_FILE. ! cartesian - use a (flat) Cartesian grid. ! spherical - use a simple spherical grid. ! mercator - use a Mercator spherical grid. GRID_FILE = "ocean_hgrid.nc" ! ! Name of the file from which to read horizontal grid data. USE_TRIPOLAR_GEOLONB_BUG = True ! [Boolean] default = True ! If true, use older code that incorrectly sets the longitude ! in some points along the tripolar fold to be off by 360 degrees. TOPO_CONFIG = "file" ! default = "file" ! This specifies how bathymetry is specified: ! file - read bathymetric information from the file ! specified by (TOPO_FILE). ! flat - flat bottom set to MAXIMUM_DEPTH. ! bowl - an analytically specified bowl-shaped basin ! ranging between MAXIMUM_DEPTH and MINIMUM_DEPTH. ! spoon - a similar shape to 'bowl', but with an vertical ! wall at the southern face. ! halfpipe - a zonally uniform channel with a half-sine ! profile in the meridional direction. TOPO_FILE = "topog.nc" ! default = "topog.nc" ! The file from which the bathymetry is read. TOPO_VARNAME = "depth" ! default = "depth" ! The name of the bathymetry variable in TOPO_FILE. TOPO_EDITS_FILE = "" ! default = "" ! The file from which to read a list of i,j,z topography overrides. !MAXIMUM_DEPTH = 5500.0 ! [m] ! The (diagnosed) maximum depth of the ocean. MINIMUM_DEPTH = 0.0 ! [m] default = 0.0 ! If MASKING_DEPTH is unspecified, then anything shallower than ! MINIMUM_DEPTH is assumed to be land and all fluxes are masked out. ! If MASKING_DEPTH is specified, then all depths shallower than ! MINIMUM_DEPTH but deeper than MASKING_DEPTH are rounded to MINIMUM_DEPTH. MASKING_DEPTH = -9999.0 ! [m] default = -9999.0 ! The depth below which to mask points as land points, for which all ! fluxes are zeroed out. MASKING_DEPTH is ignored if negative. CHANNEL_CONFIG = "none" ! default = "none" ! A parameter that determines which set of channels are ! restricted to specific widths. Options are: ! none - All channels have the grid width. ! global_1deg - Sets 16 specific channels appropriate ! for a 1-degree model, as used in CM2G. ! list - Read the channel locations and widths from a ! text file, like MOM_channel_list in the MOM_SIS ! test case. ! file - Read open face widths everywhere from a ! NetCDF file on the model grid. ROTATION = "2omegasinlat" ! default = "2omegasinlat" ! This specifies how the Coriolis parameter is specified: ! 2omegasinlat - Use twice the planetary rotation rate ! times the sine of latitude. ! betaplane - Use a beta-plane or f-plane. ! USER - call a user modified routine. OMEGA = 7.2921E-05 ! [s-1] default = 7.2921E-05 ! The rotation rate of the earth. GRID_ROTATION_ANGLE_BUGS = True ! [Boolean] default = True ! If true, use an older algorithm to calculate the sine and ! cosines needed rotate between grid-oriented directions and ! true north and east. Differences arise at the tripolar fold. ! === module hor_grid === ! Parameters providing information about the lateral grid. ! === module MOM_hor_index === ! Sets the horizontal array index types. SIS_AVAILABLE_DIAGS_FILE = "SIS.available_diags" ! default = "SIS.available_diags" ! A file into which to write a list of all available ! sea ice diagnostics that can be included in a diag_table. ! === module SIS2_ice_thm (thermo) === ! This sub-module calculates ice thermodynamic quantities. LATENT_HEAT_FUSION = 3.34E+05 ! [J kg-1] default = 3.34E+05 ! The latent heat of fusion as used by SIS. LATENT_HEAT_VAPOR = 2.5E+06 ! [J kg-1] default = 2.5E+06 ! The latent heat of vaporization of water at 0C as used by SIS. CP_ICE = 2100.0 ! [J kg-1 K-1] default = 2100.0 ! The heat capacity of fresh ice, approximated as a ! constant. CP_SEAWATER = 4200.0 ! [J kg-1 K-1] default = 4200.0 ! The heat capacity of sea water, approximated as a ! constant. CP_BRINE = 2100.0 ! [J kg-1 K-1] default = 4200.0 ! The heat capacity of water in brine pockets within the ! sea-ice, approximated as a constant. CP_BRINE and ! CP_SEAWATER should be equal, but for computational ! convenience CP_BRINE can be set equal to CP_ICE. DTFREEZE_DS = -0.054 ! [deg C PSU-1] default = -0.054 ! The derivative of the freezing temperature with salinity. ENTHALPY_LIQUID_0 = 0.0 ! [J kg-1] default = 0.0 ! The enthalpy of liquid fresh water at 0 C. The solutions ! should be physically consistent when this is adjusted, ! because only the relative value is of physical meaning, ! but roundoff errors can change the solution. ENTHALPY_UNITS = 1.0 ! [J kg-1] default = 1.0 ! A constant that rescales enthalpy from J/kg to a ! different scale in its internal representation. Changing ! this by a power of 2 is useful for debugging, as answers ! should not change. A negative values is taken as an inverse. SUBLIMATION_BUG = False ! [Boolean] default = False ! If true use an older calculation that omits the latent ! heat of fusion from the latent heat of sublimation. ! This variable should be obsoleted as soon as possible. ! === module SIS_tracer_registry === ! === module SIS_tracer_flow_control === USE_ICE_AGE_TRACER = False ! [Boolean] default = False ! If true, use the concentration based age tracer package. SIS_FAST_AVAILABLE_DIAGS_FILE = "SIS_fast.available_diags" ! default = "SIS_fast.available_diags" ! A file into which to write a list of all available ! sea ice diagnostics that can be included in a diag_table. ! === module SIS_slow_thermo === ! This module calculates the slow evolution of the ice mass, heat, and salt budgets. ICE_BULK_SALINITY = 5.0 ! [g/kg] default = 4.0 ! The fixed bulk salinity of sea ice. ICE_RELATIVE_SALINITY = 0.0 ! [nondim] default = 0.0 ! The initial salinity of sea ice as a fraction of the ! salinity of the seawater from which it formed. SIS2_FILLING_FRAZIL = False ! [Boolean] default = True ! If true, apply frazil to fill as many categories as ! possible to fill in a uniform (minimum) amount of ice ! in all the thinnest categories. Otherwise the frazil is ! always assigned to a single category. APPLY_ICE_LIMIT = False ! [Boolean] default = False ! If true, restore the sea ice state toward climatology. DO_ICE_RESTORE = False ! [Boolean] default = False ! If true, restore the sea ice state toward climatology. NUDGE_SEA_ICE = False ! [Boolean] default = False ! If true, constrain the sea ice concentrations using observations. ! === module SIS2_ice_thm (updates) === ! This sub-module does updates of the sea-ice due to thermodynamic changes. SNOW_CONDUCTIVITY = 0.31 ! [W m-1 K-1] default = 0.31 ! The conductivity of heat in snow. ICE_CONDUCTIVITY = 2.03 ! [W m-1 K-1] default = 2.03 ! The conductivity of heat in ice. DO_POND = False ! [Boolean] default = False ! If true, calculate melt ponds and use them for ! shortwave radiation calculation. TDRAIN = -0.8 ! [not defined] default = -0.8 ! Melt ponds drain to sea level when ice average temp. ! exceeds TDRAIN (stand-in for mushy layer thermo) R_MIN_POND = 0.15 ! [not defined] default = 0.15 ! Minimum retention rate of surface water sources in melt pond ! (retention scales linearly with ice cover) R_MAX_POND = 0.9 ! [not defined] default = 0.9 ! Maximum retention rate of surface water sources in melt pond ! (retention scales linearly with ice cover) MIN_POND_FRAC = 0.2 ! [not defined] default = 0.2 ! Minimum melt pond cover (by ponds at sea level) ! pond drains to this when ice is porous. MAX_POND_FRAC = 0.5 ! [not defined] default = 0.5 ! Maximum melt pond cover - associated with pond volume ! that suppresses ice top to waterline ICE_TEMP_RANGE_ESTIMATE = 40.0 ! [degC] default = 40.0 ! An estimate of the range of snow and ice temperatures ! that is used to evaluate whether an explicit diffusive ! form of the heat fluxes or an inversion based on the ! layer heat budget is more likely to be more accurate. ! Setting this to 0 causes the explicit diffusive form. ! to always be used. ! === module SIS_dyn_trans === ! This module updates the ice momentum and does ice transport. DT_ICE_DYNAMICS = 7200.0 ! [seconds] default = -1.0 ! The time step used for the slow ice dynamics, including ! stepping the continuity equation and interactions ! between the ice mass field and velocities. If 0 or ! negative the coupling time step will be used. ICEBERG_WINDSTRESS_BUG = False ! [Boolean] default = False ! If true, use older code that applied an old ice-ocean ! stress to the icebergs in place of the current air-ocean ! stress. This option is here for backward compatibility, ! but should be avoided. TIMEUNIT = 8.64E+04 ! [s] default = 8.64E+04 ! The time unit for ICE_STATS_INTERVAL. ICE_STATS_INTERVAL = 7.0 ! [days] default = 1.0 ! The interval in units of TIMEUNIT between writes of the ! globally summed ice statistics and conservation checks. DT_RHEOLOGY = 100.0 ! [seconds] default = -1.0 ! The sub-cycling time step for iterating the rheology ! and ice momentum equations. If DT_RHEOLOGY is negative, ! the time step is set via NSTEPS_DYN. ICE_STRENGTH_PSTAR = 2.75E+04 ! [Pa] default = 2.75E+04 ! A constant in the expression for the ice strength, ! P* in Hunke & Dukowicz 1997. ICE_STRENGTH_CSTAR = 20.0 ! [nondim] default = 20.0 ! A constant in the exponent of the expression for the ! ice strength, c* in Hunke & Dukowicz 1997. ICE_CDRAG_WATER = 0.00324 ! [nondim] default = 0.00324 ! The drag coefficient between the sea ice and water. AIR_WATER_STRESS_TURN_ANGLE = 0.0 ! [degrees] default = 0.0 ! An angle by which to rotate the velocities at the air- ! water boundary in calculating stresses. NSTEPS_ADV = 1 ! default = 1 ! The number of advective iterations for each slow time ! step. RECATEGORIZE_ICE = False ! [Boolean] default = True ! If true, readjust the distribution into ice thickness ! categories after advection. SEA_ICE_ROLL_FACTOR = 1.0 ! [Nondim] default = 1.0 ! A factor by which the propensity of small amounts of ! thick sea-ice to become thinner by rolling is increased ! or 0 to disable rolling. This can be thought of as the ! minimum number of ice floes in a grid cell divided by ! the horizontal floe aspect ratio. Sensible values are ! 0 (no rolling) or larger than 1. SIS_THICKNESS_ADVECTION_SCHEME = "UPWIND_2D" ! default = "UPWIND_2D" ! The horizontal transport scheme for thickness: ! UPWIND_2D - Non-directionally split upwind ! PCM - Directionally split piecewise constant ! PLM - Piecewise Linear Method ! PPM:H3 - Piecewise Parabolic Method (Huyhn 3rd order) SIS_CONTINUITY_SCHEME = "UPWIND_2D" ! default = "UPWIND_2D" ! The horizontal transport scheme used in continuity: ! UPWIND_2D - Non-directionally split upwind ! PCM - Directionally split piecewise constant ! PPM:C2PD - Positive definite PPM with 2nd order edge values ! PPM:C2MO - Monotonic PPM with 2nd order edge values CONT_PPM_VOLUME_BASED_CFL = False ! [Boolean] default = False ! If true, use the ratio of the open face lengths to the ! tracer cell areas when estimating CFL numbers. ! === module SIS_tracer_advect === SIS_TRACER_ADVECTION_SCHEME = "UPWIND_2D" ! default = "UPWIND_2D" ! The horizontal transport scheme for tracers: ! UPWIND_2D - Non-directionally split upwind ! PCM - Directionally split piecewise constant ! PLM - Piecewise Linear Method ! PPM:H3 - Piecewise Parabolic Method (Huyhn 3rd order) ! === module SIS_sum_output === WRITE_STOCKS = True ! [Boolean] default = True ! If true, write the integrated tracer amounts to stdout ! when the statistics files are written. STDOUT_HEARTBEAT = True ! [Boolean] default = True ! If true, periodically write sea ice statistics to ! stdout to allow the progress to be seen. MAXTRUNC = 0 ! [truncations save_interval-1] default = 0 ! The run will be stopped, and the day set to a very ! large value if the velocity is truncated more than ! MAXTRUNC times between writing ice statistics. ! Set MAXTRUNC to 0 to stop if there is any truncation ! of sea ice velocities. STATISTICS_FILE = "seaice.stats" ! default = "seaice.stats" ! The file to use to write the globally integrated ! statistics. ! === module SIS_fast_thermo === ! This module applies rapidly varying heat fluxes to the ice and does an implicit surface temperature calculation. REORDER_0C_HEATFLUX = False ! [Boolean] default = False ! If true, rearrange the calculation of the heat fluxes ! projected back to 0C to work on each contribution ! separately, so that they can be indentically replicated ! if there is a single fast timestep per coupled timestep ! and REDO_FAST_ICE_UPDATE=True. MAX_TSKIN_ITT = 10 ! default = 10 ! The maximum number of iterations of the skin temperature ! and optical properties during redo_update_ice_model_fast. ! === module SIS2_ice_thm (updates) === ! This sub-module does updates of the sea-ice due to thermodynamic changes. ! === module SIS_optics === ! This module calculates the albedo and absorption profiles for shortwave radiation. DO_DELTA_EDDINGTON_SW = True ! [Boolean] default = True ! If true, a delta-Eddington radiative transfer calculation ! for the shortwave radiation within the sea-ice. ICE_DELTA_EDD_R_ICE = 0.0 ! [nondimensional] default = 0.0 ! A dreadfully documented tuning parameter for the radiative ! propeties of sea ice with the delta-Eddington radiative ! transfer calculation. ICE_DELTA_EDD_R_SNOW = 0.0 ! [nondimensional] default = 0.0 ! A dreadfully documented tuning parameter for the radiative ! propeties of snow on sea ice with the delta-Eddington ! radiative transfer calculation. ICE_DELTA_EDD_R_POND = 0.0 ! [nondimensional] default = 0.0 ! A dreadfully documented tuning parameter for the radiative ! propeties of meltwater ponds on sea ice with the delta-Eddington ! radiative transfer calculation. ! === module MOM_file_parser === SEND_LOG_TO_STDOUT = False ! [Boolean] default = False ! If true, all log messages are also sent to stdout. DOCUMENT_FILE = "SIS_parameter_doc" ! default = "MOM_parameter_doc" ! The basename for files where run-time parameters, their ! settings, units and defaults are documented. Blank will ! disable all parameter documentation. COMPLETE_DOCUMENTATION = True ! [Boolean] default = True ! If true, all run-time parameters are ! documented in SIS_parameter_doc.all . MINIMAL_DOCUMENTATION = True ! [Boolean] default = True ! If true, non-default run-time parameters are ! documented in SIS_parameter_doc.short .