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MOM_input
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MOM_input
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! This input file provides the adjustable run-time parameters for version 6 of the Modular Ocean Model (MOM6).
! Where appropriate, parameters use usually given in MKS units.
! This particular file is for the example in ice_ocean_SIS2/OM4_025.
! This MOM_input file typically contains only the non-default values that are needed to reproduce this example.
! A full list of parameters for this example can be found in the corresponding MOM_parameter_doc.all file
! which is generated by the model at run-time.
! === module MOM_domains ===
TRIPOLAR_N = True ! [Boolean] default = False
! Use tripolar connectivity at the northern edge of the domain. With
! TRIPOLAR_N, NIGLOBAL must be even.
NIGLOBAL = 1440 !
! The total number of thickness grid points in the x-direction in the physical
! domain. With STATIC_MEMORY_ this is set in MOM_memory.h at compile time.
NJGLOBAL = 1080 !
! The total number of thickness grid points in the y-direction in the physical
! domain. With STATIC_MEMORY_ this is set in MOM_memory.h at compile time.
NIHALO = 4 ! default = 4
! The number of halo points on each side in the x-direction. With
! STATIC_MEMORY_ this is set as NIHALO_ in MOM_memory.h at compile time; without
! STATIC_MEMORY_ the default is NIHALO_ in MOM_memory.h (if defined) or 2.
NJHALO = 4 ! default = 4
! The number of halo points on each side in the y-direction. With
! STATIC_MEMORY_ this is set as NJHALO_ in MOM_memory.h at compile time; without
! STATIC_MEMORY_ the default is NJHALO_ in MOM_memory.h (if defined) or 2.
! LAYOUT = 32, 18 !
! The processor layout that was actually used.
! IO_LAYOUT = 1, 1 ! default = 1
! The processor layout to be used, or 0,0 to automatically set the io_layout to
! be the same as the layout.
! === module MOM ===
USE_REGRIDDING = True ! [Boolean] default = False
! If True, use the ALE algorithm (regridding/remapping). If False, use the
! layered isopycnal algorithm.
THICKNESSDIFFUSE = True ! [Boolean] default = False
! If true, interface heights are diffused with a coefficient of KHTH.
THICKNESSDIFFUSE_FIRST = True ! [Boolean] default = False
! If true, do thickness diffusion before dynamics. This is only used if
! THICKNESSDIFFUSE is true.
DT = 900.0 ! [s]
! The (baroclinic) dynamics time step. The time-step that is actually used will
! be an integer fraction of the forcing time-step (DT_FORCING in ocean-only mode
! or the coupling timestep in coupled mode.)
DT_THERM = 7200.0 ! [s] default = 900.0
! The thermodynamic and tracer advection time step. Ideally DT_THERM should be
! an integer multiple of DT and less than the forcing or coupling time-step,
! unless THERMO_SPANS_COUPLING is true, in which case DT_THERM can be an integer
! multiple of the coupling timestep. By default DT_THERM is set to DT.
THERMO_SPANS_COUPLING = True ! [Boolean] default = False
! If true, the MOM will take thermodynamic and tracer timesteps that can be
! longer than the coupling timestep. The actual thermodynamic timestep that is
! used in this case is the largest integer multiple of the coupling timestep
! that is less than or equal to DT_THERM.
USE_PSURF_IN_EOS = False ! [Boolean] default = False
! If true, always include the surface pressure contributions in equation of
! state calculations.
FRAZIL = True ! [Boolean] default = False
! If true, water freezes if it gets too cold, and the accumulated heat deficit
! is returned in the surface state. FRAZIL is only used if
! ENABLE_THERMODYNAMICS is true.
DO_GEOTHERMAL = True ! [Boolean] default = False
! If true, apply geothermal heating.
BOUND_SALINITY = True ! [Boolean] default = False
! If true, limit salinity to being positive. (The sea-ice model may ask for more
! salt than is available and drive the salinity negative otherwise.)
MIN_SALINITY = 0.01 ! [PPT] default = 0.01
! The minimum value of salinity when BOUND_SALINITY=True. The default is 0.01
! for backward compatibility but ideally should be 0.
C_P = 3992.0 ! [J kg-1 K-1] default = 3991.86795711963
! The heat capacity of sea water, approximated as a constant. This is only used
! if ENABLE_THERMODYNAMICS is true. The default value is from the TEOS-10
! definition of conservative temperature.
CHECK_BAD_SURFACE_VALS = True ! [Boolean] default = False
! If true, check the surface state for ridiculous values.
BAD_VAL_SSH_MAX = 50.0 ! [m] default = 20.0
! The value of SSH above which a bad value message is triggered, if
! CHECK_BAD_SURFACE_VALS is true.
BAD_VAL_SSS_MAX = 75.0 ! [PPT] default = 45.0
! The value of SSS above which a bad value message is triggered, if
! CHECK_BAD_SURFACE_VALS is true.
BAD_VAL_SST_MAX = 55.0 ! [deg C] default = 45.0
! The value of SST above which a bad value message is triggered, if
! CHECK_BAD_SURFACE_VALS is true.
BAD_VAL_SST_MIN = -3.0 ! [deg C] default = -2.1
! The value of SST below which a bad value message is triggered, if
! CHECK_BAD_SURFACE_VALS is true.
DEFAULT_ANSWER_DATE = 20181231 ! default = 99991231
! This sets the default value for the various _ANSWER_DATE parameters.
WRITE_GEOM = 0 ! 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.
! === module MOM_hor_index ===
! Sets the horizontal array index types.
! === module MOM_fixed_initialization ===
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.
TOPO_CONFIG = "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.
! benchmark - use the benchmark test case topography.
! Neverland - use the Neverland test case topography.
! DOME - use a slope and channel configuration for the
! DOME sill-overflow test case.
! ISOMIP - use a slope and channel configuration for the
! ISOMIP test case.
! DOME2D - use a shelf and slope configuration for the
! DOME2D gravity current/overflow test case.
! Kelvin - flat but with rotated land mask.
! seamount - Gaussian bump for spontaneous motion test case.
! dumbbell - Sloshing channel with reservoirs on both ends.
! shelfwave - exponential slope for shelfwave test case.
! Phillips - ACC-like idealized topography used in the Phillips config.
! dense - Denmark Strait-like dense water formation and overflow.
! USER - call a user modified routine.
TOPO_FILE = "ocean_topog.nc" ! default = "topog.nc"
! The file from which the bathymetry is read.
TOPO_EDITS_FILE = "All_edits.nc" ! default = ""
! The file from which to read a list of i,j,z topography overrides.
MAXIMUM_DEPTH = 6500.0 ! [m]
! The maximum depth of the ocean.
MINIMUM_DEPTH = 9.5 ! [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.
! === module MOM_open_boundary ===
! Controls where open boundaries are located, what kind of boundary condition to impose, and what data to apply,
! if any.
MASKING_DEPTH = 0.0 ! [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 = "list" ! 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.
CHANNEL_LIST_FILE = "MOM_channels_global_025" ! default = "MOM_channel_list"
! The file from which the list of narrowed channels is read.
! === module MOM_verticalGrid ===
! Parameters providing information about the vertical grid.
NK = 75 ! [nondim]
! The number of model layers.
! === module MOM_tracer_registry ===
! === module MOM_EOS ===
DTFREEZE_DP = -7.75E-08 ! [deg C Pa-1] default = 0.0
! When TFREEZE_FORM=LINEAR, this is the derivative of the freezing potential
! temperature with pressure.
! === module MOM_restart ===
PARALLEL_RESTARTFILES = True ! [Boolean] default = False
! If true, each processor writes its own restart file, otherwise a single
! restart file is generated
! === module MOM_tracer_flow_control ===
USE_IDEAL_AGE_TRACER = True ! [Boolean] default = False
! If true, use the ideal_age_example tracer package.
! === module ideal_age_example ===
! === module MOM_coord_initialization ===
COORD_CONFIG = "file" !
! This specifies how layers are to be defined:
! ALE or none - used to avoid defining layers in ALE mode
! file - read coordinate information from the file
! specified by (COORD_FILE).
! BFB - Custom coords for buoyancy-forced basin case
! based on SST_S, T_BOT and DRHO_DT.
! linear - linear based on interfaces not layers
! layer_ref - linear based on layer densities
! ts_ref - use reference temperature and salinity
! ts_range - use range of temperature and salinity
! (T_REF and S_REF) to determine surface density
! and GINT calculate internal densities.
! gprime - use reference density (RHO_0) for surface
! density and GINT calculate internal densities.
! ts_profile - use temperature and salinity profiles
! (read from COORD_FILE) to set layer densities.
! USER - call a user modified routine.
COORD_FILE = "layer_coord.nc" !
! The file from which the coordinate densities are read.
REMAP_UV_USING_OLD_ALG = True ! [Boolean] default = True
! If true, uses the old remapping-via-a-delta-z method for remapping u and v. If
! false, uses the new method that remaps between grids described by an old and
! new thickness.
REGRIDDING_COORDINATE_MODE = "HYCOM1" ! default = "LAYER"
! Coordinate mode for vertical regridding. Choose among the following
! possibilities: LAYER - Isopycnal or stacked shallow water layers
! ZSTAR, Z* - stretched geopotential z*
! SIGMA_SHELF_ZSTAR - stretched geopotential z* ignoring shelf
! SIGMA - terrain following coordinates
! RHO - continuous isopycnal
! HYCOM1 - HyCOM-like hybrid coordinate
! SLIGHT - stretched coordinates above continuous isopycnal
! ADAPTIVE - optimize for smooth neutral density surfaces
BOUNDARY_EXTRAPOLATION = True ! [Boolean] default = False
! When defined, a proper high-order reconstruction scheme is used within
! boundary cells rather than PCM. E.g., if PPM is used for remapping, a PPM
! reconstruction will also be used within boundary cells.
ALE_COORDINATE_CONFIG = "HYBRID:hycom1_75_800m.nc,sigma2,FNC1:2,4000,4.5,.01" ! default = "UNIFORM"
! Determines how to specify the coordinate resolution. Valid options are:
! PARAM - use the vector-parameter ALE_RESOLUTION
! UNIFORM[:N] - uniformly distributed
! FILE:string - read from a file. The string specifies
! the filename and variable name, separated
! by a comma or space, e.g. FILE:lev.nc,dz
! or FILE:lev.nc,interfaces=zw
! WOA09[:N] - the WOA09 vertical grid (approximately)
! FNC1:string - FNC1:dz_min,H_total,power,precision
! HYBRID:string - read from a file. The string specifies
! the filename and two variable names, separated
! by a comma or space, for sigma-2 and dz. e.g.
! HYBRID:vgrid.nc,sigma2,dz
!ALE_RESOLUTION = 7*2.0, 2*2.01, 2.02, 2.03, 2.05, 2.08, 2.11, 2.15, 2.21, 2.2800000000000002, 2.37, 2.48, 2.61, 2.77, 2.95, 3.17, 3.4299999999999997, 3.74, 4.09, 4.49, 4.95, 5.48, 6.07, 6.74, 7.5, 8.34, 9.280000000000001, 10.33, 11.49, 12.77, 14.19, 15.74, 17.450000000000003, 19.31, 21.35, 23.56, 25.97, 28.580000000000002, 31.41, 34.47, 37.77, 41.32, 45.14, 49.25, 53.65, 58.370000000000005, 63.42, 68.81, 74.56, 80.68, 87.21000000000001, 94.14, 101.51, 109.33, 117.62, 126.4, 135.68, 145.5, 155.87, 166.81, 178.35, 190.51, 203.31, 216.78, 230.93, 245.8, 261.42, 277.83 ! [m]
! The distribution of vertical resolution for the target
! grid used for Eulerian-like coordinates. For example,
! in z-coordinate mode, the parameter is a list of level
! thicknesses (in m). In sigma-coordinate mode, the list
! is of non-dimensional fractions of the water column.
!TARGET_DENSITIES = 1010.0, 1014.3034, 1017.8088, 1020.843, 1023.5566, 1025.813, 1027.0275, 1027.9114, 1028.6422, 1029.2795, 1029.852, 1030.3762, 1030.8626, 1031.3183, 1031.7486, 1032.1572, 1032.5471, 1032.9207, 1033.2798, 1033.6261, 1033.9608, 1034.2519, 1034.4817, 1034.6774, 1034.8508, 1035.0082, 1035.1533, 1035.2886, 1035.4159, 1035.5364, 1035.6511, 1035.7608, 1035.8661, 1035.9675, 1036.0645, 1036.1554, 1036.2411, 1036.3223, 1036.3998, 1036.4739, 1036.5451, 1036.6137, 1036.68, 1036.7441, 1036.8062, 1036.8526, 1036.8874, 1036.9164, 1036.9418, 1036.9647, 1036.9857, 1037.0052, 1037.0236, 1037.0409, 1037.0574, 1037.0738, 1037.0902, 1037.1066, 1037.123, 1037.1394, 1037.1558, 1037.1722, 1037.1887, 1037.206, 1037.2241, 1037.2435, 1037.2642, 1037.2866, 1037.3112, 1037.3389, 1037.3713, 1037.4118, 1037.475, 1037.6332, 1037.8104, 1038.0 ! [m]
! HYBRID target densities for interfaces
REGRID_COMPRESSIBILITY_FRACTION = 0.01 ! [nondim] default = 0.0
! When interpolating potential density profiles we can add some artificial
! compressibility solely to make homogeneous regions appear stratified.
MAXIMUM_INT_DEPTH_CONFIG = "FNC1:5,8000.0,1.0,.01" ! default = "NONE"
! Determines how to specify the maximum interface depths.
! Valid options are:
! NONE - there are no maximum interface depths
! PARAM - use the vector-parameter MAXIMUM_INTERFACE_DEPTHS
! FILE:string - read from a file. The string specifies
! the filename and variable name, separated
! by a comma or space, e.g. FILE:lev.nc,Z
! FNC1:string - FNC1:dz_min,H_total,power,precision
!MAXIMUM_INT_DEPTHS = 0.0, 5.0, 12.75, 23.25, 36.49, 52.480000000000004, 71.22, 92.71000000000001, 116.94000000000001, 143.92000000000002, 173.65, 206.13, 241.36, 279.33000000000004, 320.05000000000007, 363.5200000000001, 409.7400000000001, 458.7000000000001, 510.4100000000001, 564.8700000000001, 622.0800000000002, 682.0300000000002, 744.7300000000002, 810.1800000000003, 878.3800000000003, 949.3300000000004, 1023.0200000000004, 1099.4600000000005, 1178.6500000000005, 1260.5900000000006, 1345.2700000000007, 1432.7000000000007, 1522.8800000000008, 1615.8100000000009, 1711.490000000001, 1809.910000000001, 1911.080000000001, 2015.0000000000011, 2121.670000000001, 2231.080000000001, 2343.2400000000007, 2458.1500000000005, 2575.8100000000004, 2696.2200000000003, 2819.3700000000003, 2945.2700000000004, 3073.9200000000005, 3205.3200000000006, 3339.4600000000005, 3476.3500000000004, 3615.9900000000002, 3758.38, 3903.52, 4051.4, 4202.03, 4355.41, 4511.54, 4670.41, 4832.03, 4996.4, 5163.5199999999995, 5333.379999999999, 5505.989999999999, 5681.3499999999985, 5859.459999999998, 6040.319999999998, 6223.919999999998, 6410.269999999999, 6599.369999999999, 6791.219999999999, 6985.8099999999995, 7183.15, 7383.24, 7586.08, 7791.67, 8000.0
! The list of maximum depths for each interface.
MAX_LAYER_THICKNESS_CONFIG = "FNC1:400,31000.0,0.1,.01" ! default = "NONE"
! Determines how to specify the maximum layer thicknesses.
! Valid options are:
! NONE - there are no maximum layer thicknesses
! PARAM - use the vector-parameter MAX_LAYER_THICKNESS
! FILE:string - read from a file. The string specifies
! the filename and variable name, separated
! by a comma or space, e.g. FILE:lev.nc,Z
! FNC1:string - FNC1:dz_min,H_total,power,precision
!MAX_LAYER_THICKNESS = 400.0, 409.63, 410.32, 410.75, 411.07, 411.32, 411.52, 411.7, 411.86, 412.0, 412.13, 412.24, 412.35, 412.45, 412.54, 412.63, 412.71, 412.79, 412.86, 412.93, 413.0, 413.06, 413.12, 413.18, 413.24, 413.29, 413.34, 413.39, 413.44, 413.49, 413.54, 413.58, 413.62, 413.67, 413.71, 413.75, 413.78, 413.82, 413.86, 413.9, 413.93, 413.97, 414.0, 414.03, 414.06, 414.1, 414.13, 414.16, 414.19, 414.22, 414.24, 414.27, 414.3, 414.33, 414.35, 414.38, 414.41, 414.43, 414.46, 414.48, 414.51, 414.53, 414.55, 414.58, 414.6, 414.62, 414.65, 414.67, 414.69, 414.71, 414.73, 414.75, 414.77, 414.79, 414.83 ! [m]
! The list of maximum thickness for each layer.
REMAPPING_SCHEME = "PPM_H4" ! default = "PLM"
! This sets the reconstruction scheme used for vertical remapping for all
! variables. It can be one of the following schemes: PCM (1st-order
! accurate)
! PLM (2nd-order accurate)
! PPM_H4 (3rd-order accurate)
! PPM_IH4 (3rd-order accurate)
! PQM_IH4IH3 (4th-order accurate)
! PQM_IH6IH5 (5th-order accurate)
! === module MOM_grid ===
! Parameters providing information about the lateral grid.
! === module MOM_state_initialization ===
INIT_LAYERS_FROM_Z_FILE = True ! [Boolean] default = False
! If true, initialize the layer thicknesses, temperatures, and salinities from a
! Z-space file on a latitude-longitude grid.
! === module MOM_initialize_layers_from_Z ===
TEMP_SALT_Z_INIT_FILE = "" ! default = "temp_salt_z.nc"
! The name of the z-space input file used to initialize temperatures (T) and
! salinities (S). If T and S are not in the same file, TEMP_Z_INIT_FILE and
! SALT_Z_INIT_FILE must be set.
TEMP_Z_INIT_FILE = "woa13_decav_ptemp_monthly_fulldepth_01.nc" ! default = ""
! The name of the z-space input file used to initialize temperatures, only.
SALT_Z_INIT_FILE = "woa13_decav_s_monthly_fulldepth_01.nc" ! default = ""
! The name of the z-space input file used to initialize temperatures, only.
Z_INIT_FILE_PTEMP_VAR = "ptemp_an" ! default = "ptemp"
! The name of the potential temperature variable in TEMP_Z_INIT_FILE.
Z_INIT_FILE_SALT_VAR = "s_an" ! default = "salt"
! The name of the salinity variable in SALT_Z_INIT_FILE.
Z_INIT_ALE_REMAPPING = True ! [Boolean] default = False
! If True, then remap straight to model coordinate from file.
Z_INIT_REMAP_OLD_ALG = True ! [Boolean] default = True
! If false, uses the preferred remapping algorithm for initialization. If true,
! use an older, less robust algorithm for remapping.
! === module MOM_diag_mediator ===
NUM_DIAG_COORDS = 2 ! default = 1
! The number of diagnostic vertical coordinates to use. For each coordinate, an
! entry in DIAG_COORDS must be provided.
DIAG_COORDS = "z Z ZSTAR", "rho2 RHO2 RHO" !
! A list of string tuples associating diag_table modules to a coordinate
! definition used for diagnostics. Each string is of the form
! "MODULE_SUFFIX,PARAMETER_SUFFIX,COORDINATE_NAME".
DIAG_COORD_DEF_RHO2 = "FILE:diag_rho2.nc,interfaces=rho2" ! default = "WOA09"
! Determines how to specify the coordinate resolution. Valid options are:
! PARAM - use the vector-parameter DIAG_COORD_RES_RHO2
! UNIFORM[:N] - uniformly distributed
! FILE:string - read from a file. The string specifies
! the filename and variable name, separated
! by a comma or space, e.g. FILE:lev.nc,dz
! or FILE:lev.nc,interfaces=zw
! WOA09[:N] - the WOA09 vertical grid (approximately)
! FNC1:string - FNC1:dz_min,H_total,power,precision
! HYBRID:string - read from a file. The string specifies
! the filename and two variable names, separated
! by a comma or space, for sigma-2 and dz. e.g.
! HYBRID:vgrid.nc,sigma2,dz
! === module MOM_MEKE ===
USE_MEKE = True ! [Boolean] default = False
! If true, turns on the MEKE scheme which calculates a sub-grid mesoscale eddy
! kinetic energy budget.
MEKE_GMCOEFF = 1.0 ! [nondim] default = -1.0
! The efficiency of the conversion of potential energy into MEKE by the
! thickness mixing parameterization. If MEKE_GMCOEFF is negative, this
! conversion is not used or calculated.
MEKE_BGSRC = 1.0E-13 ! [W kg-1] default = 0.0
! A background energy source for MEKE.
MEKE_KHMEKE_FAC = 1.0 ! [nondim] default = 0.0
! A factor that maps MEKE%Kh to Kh for MEKE itself.
MEKE_ALPHA_RHINES = 0.15 ! [nondim] default = 0.05
! If positive, is a coefficient weighting the Rhines scale in the expression for
! mixing length used in MEKE-derived diffusivity.
MEKE_ALPHA_EADY = 0.15 ! [nondim] default = 0.05
! If positive, is a coefficient weighting the Eady length scale in the
! expression for mixing length used in MEKE-derived diffusivity.
! === module MOM_lateral_mixing_coeffs ===
USE_VARIABLE_MIXING = True ! [Boolean] default = False
! If true, the variable mixing code will be called. This allows diagnostics to
! be created even if the scheme is not used. If KHTR_SLOPE_CFF>0 or
! KhTh_Slope_Cff>0, this is set to true regardless of what is in the parameter
! file.
RESOLN_SCALED_KH = True ! [Boolean] default = False
! If true, the Laplacian lateral viscosity is scaled away when the first
! baroclinic deformation radius is well resolved.
RESOLN_SCALED_KHTH = True ! [Boolean] default = False
! If true, the interface depth diffusivity is scaled away when the first
! baroclinic deformation radius is well resolved.
KHTR_SLOPE_CFF = 0.25 ! [nondim] default = 0.0
! The nondimensional coefficient in the Visbeck formula for the epipycnal tracer
! diffusivity
USE_STORED_SLOPES = True ! [Boolean] default = False
! If true, the isopycnal slopes are calculated once and stored for re-use. This
! uses more memory but avoids calling the equation of state more times than
! should be necessary.
INTERPOLATE_RES_FN = False ! [Boolean] default = True
! If true, interpolate the resolution function to the velocity points from the
! thickness points; otherwise interpolate the wave speed and calculate the
! resolution function independently at each point.
GILL_EQUATORIAL_LD = True ! [Boolean] default = False
! If true, uses Gill's definition of the baroclinic equatorial deformation
! radius, otherwise, if false, use Pedlosky's definition. These definitions
! differ by a factor of 2 in front of the beta term in the denominator. Gill's
! is the more appropriate definition.
INTERNAL_WAVE_SPEED_BETTER_EST = False ! [Boolean] default = False
! If true, use a more robust estimate of the first mode wave speed as the
! starting point for iterations.
! === module MOM_set_visc ===
CHANNEL_DRAG = True ! [Boolean] default = False
! If true, the bottom drag is exerted directly on each layer proportional to the
! fraction of the bottom it overlies.
PRANDTL_TURB = 1.25 ! [nondim] default = 1.0
! The turbulent Prandtl number applied to shear instability.
HBBL = 10.0 ! [m]
! The thickness of a bottom boundary layer with a viscosity of KVBBL if
! BOTTOMDRAGLAW is not defined, or the thickness over which near-bottom
! velocities are averaged for the drag law if BOTTOMDRAGLAW is defined but
! LINEAR_DRAG is not.
DRAG_BG_VEL = 0.1 ! [m s-1] default = 0.0
! DRAG_BG_VEL is either the assumed bottom velocity (with LINEAR_DRAG) or an
! unresolved velocity that is combined with the resolved velocity to estimate
! the velocity magnitude. DRAG_BG_VEL is only used when BOTTOMDRAGLAW is
! defined.
BBL_USE_EOS = True ! [Boolean] default = False
! If true, use the equation of state in determining the properties of the bottom
! boundary layer. Otherwise use the layer target potential densities.
BBL_THICK_MIN = 0.1 ! [m] default = 0.0
! The minimum bottom boundary layer thickness that can be used with
! BOTTOMDRAGLAW. This might be Kv/(cdrag*drag_bg_vel) to give Kv as the minimum
! near-bottom viscosity.
KV = 1.0E-04 ! [m2 s-1]
! The background kinematic viscosity in the interior. The molecular value, ~1e-6
! m2 s-1, may be used.
KV_BBL_MIN = 0.0 ! [m2 s-1] default = 1.0E-04
! The minimum viscosities in the bottom boundary layer.
KV_TBL_MIN = 0.0 ! [m2 s-1] default = 1.0E-04
! The minimum viscosities in the top boundary layer.
! === module MOM_thickness_diffuse ===
KHTH_MAX_CFL = 0.1 ! [nondimensional] default = 0.8
! The maximum value of the local diffusive CFL ratio that is permitted for the
! thickness diffusivity. 1.0 is the marginally unstable value in a pure layered
! model, but much smaller numbers (e.g. 0.1) seem to work better for ALE-based
! models.
USE_GM_WORK_BUG = True ! [Boolean] default = True
! If true, compute the top-layer work tendency on the u-grid with the incorrect
! sign, for legacy reproducibility.
! === module MOM_porous_barriers ===
PORBAR_ANSWER_DATE = 99991231 ! default = 20181231
! The vintage of the porous barrier weight function calculations. Values below
! 20220806 recover the old answers in which the layer averaged weights are not
! strictly limited by an upper-bound of 1.0 .
! === module MOM_continuity ===
! === module MOM_continuity_PPM ===
ETA_TOLERANCE = 1.0E-06 ! [m] default = 3.75E-09
! The tolerance for the differences between the barotropic and baroclinic
! estimates of the sea surface height due to the fluxes through each face. The
! total tolerance for SSH is 4 times this value. The default is
! 0.5*NK*ANGSTROM, and this should not be set less than about
! 10^-15*MAXIMUM_DEPTH.
ETA_TOLERANCE_AUX = 0.001 ! [m] default = 1.0E-06
! The tolerance for free-surface height discrepancies between the barotropic
! solution and the sum of the layer thicknesses when calculating the auxiliary
! corrected velocities. By default, this is the same as ETA_TOLERANCE, but can
! be made larger for efficiency.
! === module MOM_CoriolisAdv ===
CORIOLIS_SCHEME = "SADOURNY75_ENSTRO" ! default = "SADOURNY75_ENERGY"
! CORIOLIS_SCHEME selects the discretization for the Coriolis terms. Valid
! values are:
! SADOURNY75_ENERGY - Sadourny, 1975; energy cons.
! ARAKAWA_HSU90 - Arakawa & Hsu, 1990
! SADOURNY75_ENSTRO - Sadourny, 1975; enstrophy cons.
! ARAKAWA_LAMB81 - Arakawa & Lamb, 1981; En. + Enst.
! ARAKAWA_LAMB_BLEND - A blend of Arakawa & Lamb with
! Arakawa & Hsu and Sadourny energy
BOUND_CORIOLIS = True ! [Boolean] default = False
! If true, the Coriolis terms at u-points are bounded by the four estimates of
! (f+rv)v from the four neighboring v-points, and similarly at v-points. This
! option would have no effect on the SADOURNY Coriolis scheme if it were
! possible to use centered difference thickness fluxes.
! === module MOM_PressureForce ===
! === module MOM_PressureForce_AFV ===
MASS_WEIGHT_IN_PRESSURE_GRADIENT = True ! [Boolean] default = False
! If true, use mass weighting when interpolating T/S for integrals near the
! bathymetry in AFV pressure gradient calculations.
! === module MOM_hor_visc ===
LAPLACIAN = True ! [Boolean] default = False
! If true, use a Laplacian horizontal viscosity.
AH_VEL_SCALE = 0.01 ! [m s-1] default = 0.0
! The velocity scale which is multiplied by the cube of the grid spacing to
! calculate the biharmonic viscosity. The final viscosity is the largest of this
! scaled viscosity, the Smagorinsky and Leith viscosities, and AH.
SMAGORINSKY_AH = True ! [Boolean] default = False
! If true, use a biharmonic Smagorinsky nonlinear eddy viscosity.
SMAG_BI_CONST = 0.06 ! [nondim] default = 0.0
! The nondimensional biharmonic Smagorinsky constant, typically 0.015 - 0.06.
USE_LAND_MASK_FOR_HVISC = False ! [Boolean] default = False
! If true, use Use the land mask for the computation of thicknesses at velocity
! locations. This eliminates the dependence on arbitrary values over land or
! outside of the domain. Default is False in order to maintain answers with
! legacy experiments but should be changed to True for new experiments.
! === module MOM_vert_friction ===
HMIX_FIXED = 0.5 ! [m]
! The prescribed depth over which the near-surface viscosity and diffusivity are
! elevated when the bulk mixed layer is not used.
KV_ML_INVZ2 = 1.0E-04 ! [m2 s-1] default = 0.0
! An extra kinematic viscosity in a mixed layer of thickness HMIX_FIXED, with
! the actual viscosity scaling as 1/(z*HMIX_FIXED)^2, where z is the distance
! from the surface, to allow for finite wind stresses to be transmitted through.
MAXVEL = 6.0 ! [m s-1] default = 3.0E+08
! The maximum velocity allowed before the velocity components are truncated.
! === module MOM_PointAccel ===
U_TRUNC_FILE = "U_velocity_truncations" ! default = ""
! The absolute path to a file into which the accelerations leading to zonal
! velocity truncations are written. Undefine this for efficiency if this
! diagnostic is not needed.
V_TRUNC_FILE = "V_velocity_truncations" ! default = ""
! The absolute path to a file into which the accelerations leading to meridional
! velocity truncations are written. Undefine this for efficiency if this
! diagnostic is not needed.
! === module MOM_barotropic ===
BOUND_BT_CORRECTION = True ! [Boolean] default = False
! If true, the corrective pseudo mass-fluxes into the barotropic solver are
! limited to values that require less than maxCFL_BT_cont to be accommodated.
BT_PROJECT_VELOCITY = True ! [Boolean] default = False
! If true, step the barotropic velocity first and project out the velocity
! tendency by 1+BEBT when calculating the transport. The default (false) is to
! use a predictor continuity step to find the pressure field, and then to do a
! corrector continuity step using a weighted average of the old and new
! velocities, with weights of (1-BEBT) and BEBT.
DYNAMIC_SURFACE_PRESSURE = True ! [Boolean] default = False
! If true, add a dynamic pressure due to a viscous ice shelf, for instance.
BEBT = 0.2 ! [nondim] default = 0.1
! BEBT determines whether the barotropic time stepping uses the forward-backward
! time-stepping scheme or a backward Euler scheme. BEBT is valid in the range
! from 0 (for a forward-backward treatment of nonrotating gravity waves) to 1
! (for a backward Euler treatment). In practice, BEBT must be greater than about
! 0.05.
DTBT = -0.9 ! [s or nondim] default = -0.98
! The barotropic time step, in s. DTBT is only used with the split explicit time
! stepping. To set the time step automatically based the maximum stable value
! use 0, or a negative value gives the fraction of the stable value. Setting
! DTBT to 0 is the same as setting it to -0.98. The value of DTBT that will
! actually be used is an integer fraction of DT, rounding down.
BT_USE_OLD_CORIOLIS_BRACKET_BUG = True ! [Boolean] default = False
! If True, use an order of operations that is not bitwise rotationally symmetric
! in the meridional Coriolis term of the barotropic solver.
! === module MOM_mixed_layer_restrat ===
MIXEDLAYER_RESTRAT = True ! [Boolean] default = False
! If true, a density-gradient dependent re-stratifying flow is imposed in the
! mixed layer. Can be used in ALE mode without restriction but in layer mode can
! only be used if BULKMIXEDLAYER is true.
FOX_KEMPER_ML_RESTRAT_COEF = 1.0 ! [nondim] default = 0.0
! A nondimensional coefficient that is proportional to the ratio of the
! deformation radius to the dominant lengthscale of the submesoscale mixed layer
! instabilities, times the minimum of the ratio of the mesoscale eddy kinetic
! energy to the large-scale geostrophic kinetic energy or 1 plus the square of
! the grid spacing over the deformation radius, as detailed by Fox-Kemper et al.
! (2010)
MLE_FRONT_LENGTH = 500.0 ! [m] default = 0.0
! If non-zero, is the frontal-length scale used to calculate the upscaling of
! buoyancy gradients that is otherwise represented by the parameter
! FOX_KEMPER_ML_RESTRAT_COEF. If MLE_FRONT_LENGTH is non-zero, it is recommended
! to set FOX_KEMPER_ML_RESTRAT_COEF=1.0.
MLE_USE_PBL_MLD = True ! [Boolean] default = False
! If true, the MLE parameterization will use the mixed-layer depth provided by
! the active PBL parameterization. If false, MLE will estimate a MLD based on a
! density difference with the surface using the parameter MLE_DENSITY_DIFF.
MLE_MLD_DECAY_TIME = 2.592E+06 ! [s] default = 0.0
! The time-scale for a running-mean filter applied to the mixed-layer depth used
! in the MLE restratification parameterization. When the MLD deepens below the
! current running-mean the running-mean is instantaneously set to the current
! MLD.
! === module MOM_diabatic_driver ===
! The following parameters are used for diabatic processes.
ENERGETICS_SFC_PBL = True ! [Boolean] default = False
! If true, use an implied energetics planetary boundary layer scheme to
! determine the diffusivity and viscosity in the surface boundary layer.
EPBL_IS_ADDITIVE = False ! [Boolean] default = True
! If true, the diffusivity from ePBL is added to all other diffusivities.
! Otherwise, the larger of kappa-shear and ePBL diffusivities are used.
! === module MOM_CVMix_KPP ===
! This is the MOM wrapper to CVMix:KPP
! See http://cvmix.github.io/
! === module MOM_tidal_mixing ===
! Vertical Tidal Mixing Parameterization
INT_TIDE_DISSIPATION = True ! [Boolean] default = False
! If true, use an internal tidal dissipation scheme to drive diapycnal mixing,
! along the lines of St. Laurent et al. (2002) and Simmons et al. (2004).
INT_TIDE_PROFILE = "POLZIN_09" ! default = "STLAURENT_02"
! INT_TIDE_PROFILE selects the vertical profile of energy dissipation with
! INT_TIDE_DISSIPATION. Valid values are:
! STLAURENT_02 - Use the St. Laurent et al exponential
! decay profile.
! POLZIN_09 - Use the Polzin WKB-stretched algebraic
! decay profile.
INT_TIDE_DECAY_SCALE = 300.3003003003003 ! [m] default = 500.0
! The decay scale away from the bottom for tidal TKE with the new coding when
! INT_TIDE_DISSIPATION is used.
KAPPA_ITIDES = 6.28319E-04 ! [m-1] default = 6.283185307179586E-04
! A topographic wavenumber used with INT_TIDE_DISSIPATION. The default is 2pi/10
! km, as in St.Laurent et al. 2002.
KAPPA_H2_FACTOR = 0.84 ! [nondim] default = 1.0
! A scaling factor for the roughness amplitude with INT_TIDE_DISSIPATION.
TKE_ITIDE_MAX = 0.1 ! [W m-2] default = 1000.0
! The maximum internal tide energy source available to mix above the bottom
! boundary layer with INT_TIDE_DISSIPATION.
READ_TIDEAMP = True ! [Boolean] default = False
! If true, read a file (given by TIDEAMP_FILE) containing the tidal amplitude
! with INT_TIDE_DISSIPATION.
TIDEAMP_FILE = "tidal_amplitude.v20140616.nc" ! default = "tideamp.nc"
! The path to the file containing the spatially varying tidal amplitudes with
! INT_TIDE_DISSIPATION.
H2_FILE = "ocean_topog.nc" !
! The path to the file containing the sub-grid-scale topographic roughness
! amplitude with INT_TIDE_DISSIPATION.
! === module MOM_CVMix_conv ===
! Parameterization of enhanced mixing due to convection via CVMix
! === module MOM_geothermal ===
GEOTHERMAL_SCALE = 1.0 ! [W m-2 or various] default = 0.0
! The constant geothermal heat flux, a rescaling factor for the heat flux read
! from GEOTHERMAL_FILE, or 0 to disable the geothermal heating.
GEOTHERMAL_FILE = "geothermal_davies2013_v1.nc" ! default = ""
! The file from which the geothermal heating is to be read, or blank to use a
! constant heating rate.
GEOTHERMAL_VARNAME = "geothermal_hf" ! default = "geo_heat"
! The name of the geothermal heating variable in GEOTHERMAL_FILE.
! === module MOM_set_diffusivity ===
BBL_MIXING_AS_MAX = False ! [Boolean] default = True
! If true, take the maximum of the diffusivity from the BBL mixing and the other
! diffusivities. Otherwise, diffusivity from the BBL_mixing is simply added.
USE_LOTW_BBL_DIFFUSIVITY = True ! [Boolean] default = False
! If true, uses a simple, imprecise but non-coordinate dependent, model of BBL
! mixing diffusivity based on Law of the Wall. Otherwise, uses the original BBL
! scheme.
SIMPLE_TKE_TO_KD = True ! [Boolean] default = False
! If true, uses a simple estimate of Kd/TKE that will work for arbitrary
! vertical coordinates. If false, calculates Kd/TKE and bounds based on exact
! energetics for an isopycnal layer-formulation.
! === module MOM_bkgnd_mixing ===
! Adding static vertical background mixing coefficients
KD = 1.5E-05 ! [m2 s-1]
! The background diapycnal diffusivity of density in the interior. Zero or the
! molecular value, ~1e-7 m2 s-1, may be used.
KD_MIN = 2.0E-06 ! [m2 s-1] default = 1.5E-07
! The minimum diapycnal diffusivity.
HENYEY_IGW_BACKGROUND = True ! [Boolean] default = False
! If true, use a latitude-dependent scaling for the near surface background
! diffusivity, as described in Harrison & Hallberg, JPO 2008.
KD_MAX = 0.1 ! [m2 s-1] default = -1.0
! The maximum permitted increment for the diapycnal diffusivity from TKE-based
! parameterizations, or a negative value for no limit.
! === module MOM_kappa_shear ===
! Parameterization of shear-driven turbulence following Jackson, Hallberg and Legg, JPO 2008
USE_JACKSON_PARAM = True ! [Boolean] default = False
! If true, use the Jackson-Hallberg-Legg (JPO 2008) shear mixing
! parameterization.
MAX_RINO_IT = 25 ! [nondim] default = 50
! The maximum number of iterations that may be used to estimate the Richardson
! number driven mixing.
KAPPA_SHEAR_ITER_BUG = True ! [Boolean] default = True
! If true, use an older, dimensionally inconsistent estimate of the derivative
! of diffusivity with energy in the Newton's method iteration. The bug causes
! undercorrections when dz > 1 m.
KAPPA_SHEAR_ALL_LAYER_TKE_BUG = True ! [Boolean] default = True
! If true, report back the latest estimate of TKE instead of the time average
! TKE when there is mass in all layers. Otherwise always report the time
! averaged TKE, as is currently done when there are some massless layers.
! === module MOM_CVMix_shear ===
! Parameterization of shear-driven turbulence via CVMix (various options)
! === module MOM_CVMix_ddiff ===
! Parameterization of mixing due to double diffusion processes via CVMix
! === module MOM_diabatic_aux ===
! The following parameters are used for auxiliary diabatic processes.
PRESSURE_DEPENDENT_FRAZIL = True ! [Boolean] default = False
! If true, use a pressure dependent freezing temperature when making frazil. The
! default is false, which will be faster but is inappropriate with ice-shelf
! cavities.
VAR_PEN_SW = True ! [Boolean] default = False
! If true, use one of the CHL_A schemes specified by OPACITY_SCHEME to determine
! the e-folding depth of incoming short wave radiation.
CHL_FILE = "seawifs-clim-1997-2010.1440x1080.v20180328.nc" !
! CHL_FILE is the file containing chl_a concentrations in the variable CHL_A. It
! is used when VAR_PEN_SW and CHL_FROM_FILE are true.
CHL_VARNAME = "chlor_a" ! default = "CHL_A"
! Name of CHL_A variable in CHL_FILE.
! === module MOM_energetic_PBL ===
ML_OMEGA_FRAC = 0.001 ! [nondim] default = 0.0
! When setting the decay scale for turbulence, use this fraction of the absolute
! rotation rate blended with the local value of f, as sqrt((1-of)*f^2 +
! of*4*omega^2).
TKE_DECAY = 0.01 ! [nondim] default = 2.5
! TKE_DECAY relates the vertical rate of decay of the TKE available for
! mechanical entrainment to the natural Ekman depth.
EPBL_MSTAR_SCHEME = "OM4" ! default = "CONSTANT"
! EPBL_MSTAR_SCHEME selects the method for setting mstar. Valid values are:
! CONSTANT - Use a fixed mstar given by MSTAR
! OM4 - Use L_Ekman/L_Obukhov in the sabilizing limit, as in OM4
! REICHL_H18 - Use the scheme documented in Reichl & Hallberg, 2018.
MSTAR_CAP = 10.0 ! [nondim] default = -1.0
! If this value is positive, it sets the maximum value of mstar allowed in ePBL.
! (This is not used if EPBL_MSTAR_SCHEME = CONSTANT).
MSTAR2_COEF1 = 0.29 ! [nondim] default = 0.3
! Coefficient in computing mstar when rotation and stabilizing effects are both
! important (used if EPBL_MSTAR_SCHEME = OM4).
MSTAR2_COEF2 = 0.152 ! [nondim] default = 0.085
! Coefficient in computing mstar when only rotation limits the total mixing
! (used if EPBL_MSTAR_SCHEME = OM4)
NSTAR = 0.06 ! [nondim] default = 0.2
! The portion of the buoyant potential energy imparted by surface fluxes that is
! available to drive entrainment at the base of mixed layer when that energy is
! positive.
EPBL_MLD_BISECTION = True ! [Boolean] default = True
! If true, use bisection with the iterative determination of the self-consistent
! mixed layer depth. Otherwise use the false position after a maximum and
! minimum bound have been evaluated and the returned value or bisection before
! this.
MSTAR_CONV_ADJ = 0.667 ! [nondim] default = 0.0
! Coefficient used for reducing mstar during convection due to reduction of
! stable density gradient.
USE_MLD_ITERATION = True ! [Boolean] default = False
! A logical that specifies whether or not to use the distance to the bottom of
! the actively turbulent boundary layer to help set the EPBL length scale.
EPBL_TRANSITION_SCALE = 0.01 ! [nondim] default = 0.1
! A scale for the mixing length in the transition layer at the edge of the
! boundary layer as a fraction of the boundary layer thickness.
MIX_LEN_EXPONENT = 1.0 ! [nondim] default = 2.0
! The exponent applied to the ratio of the distance to the MLD and the MLD depth
! which determines the shape of the mixing length. This is only used if
! USE_MLD_ITERATION is True.
USE_LA_LI2016 = True ! [nondim] default = False
! A logical to use the Li et al. 2016 (submitted) formula to determine the
! Langmuir number.
EPBL_LANGMUIR_SCHEME = "ADDITIVE" ! default = "NONE"
! EPBL_LANGMUIR_SCHEME selects the method for including Langmuir turbulence.
! Valid values are:
! NONE - Do not do any extra mixing due to Langmuir turbulence
! RESCALE - Use a multiplicative rescaling of mstar to account for Langmuir
! turbulence
! ADDITIVE - Add a Langmuir turblence contribution to mstar to other
! contributions
LT_ENHANCE_COEF = 0.044 ! [nondim] default = 0.447
! Coefficient for Langmuir enhancement of mstar
LT_ENHANCE_EXP = -1.5 ! [nondim] default = -1.33
! Exponent for Langmuir enhancementt of mstar
LT_MOD_LAC1 = 0.0 ! [nondim] default = -0.87
! Coefficient for modification of Langmuir number due to MLD approaching Ekman
! depth.
LT_MOD_LAC4 = 0.0 ! [nondim] default = 0.95
! Coefficient for modification of Langmuir number due to ratio of Ekman to
! stable Obukhov depth.
LT_MOD_LAC5 = 0.22 ! [nondim] default = 0.95
! Coefficient for modification of Langmuir number due to ratio of Ekman to
! unstable Obukhov depth.
! === module MOM_regularize_layers ===
! === module MOM_opacity ===
PEN_SW_NBANDS = 3 ! default = 1
! The number of bands of penetrating shortwave radiation.
! === module MOM_tracer_advect ===
TRACER_ADVECTION_SCHEME = "PPM:H3" ! default = "PLM"
! The horizontal transport scheme for tracers:
! PLM - Piecewise Linear Method
! PPM:H3 - Piecewise Parabolic Method (Huyhn 3rd order)
! PPM - Piecewise Parabolic Method (Colella-Woodward)
! === module MOM_tracer_hor_diff ===
CHECK_DIFFUSIVE_CFL = True ! [Boolean] default = False
! If true, use enough iterations the diffusion to ensure that the diffusive
! equivalent of the CFL limit is not violated. If false, always use the greater
! of 1 or MAX_TR_DIFFUSION_CFL iteration.
! === module MOM_neutral_diffusion ===
! This module implements neutral diffusion of tracers
! === module MOM_lateral_boundary_diffusion ===
! This module implements lateral diffusion of tracers near boundaries
! === module MOM_sum_output ===
MAXTRUNC = 100000 ! [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 energy saves. Set MAXTRUNC to 0
! to stop if there is any truncation of velocities.
ENERGYSAVEDAYS = 0.25 ! [days] default = 1.0
! The interval in units of TIMEUNIT between saves of the energies of the run and
! other globally summed diagnostics.
! === module ocean_model_init ===
! === module MOM_surface_forcing ===
MAX_P_SURF = 0.0 ! [Pa] default = -1.0
! The maximum surface pressure that can be exerted by the atmosphere and
! floating sea-ice or ice shelves. This is needed because the FMS coupling
! structure does not limit the water that can be frozen out of the ocean and the
! ice-ocean heat fluxes are treated explicitly. No limit is applied if a
! negative value is used.
CD_TIDES = 0.0018 ! [nondim] default = 1.0E-04
! The drag coefficient that applies to the tides.
GUST_CONST = 0.0 ! [Pa] default = 0.02
! The background gustiness in the winds.
FIX_USTAR_GUSTLESS_BUG = False ! [Boolean] default = False
! If true correct a bug in the time-averaging of the gustless wind friction
! velocity
USE_RIGID_SEA_ICE = True ! [Boolean] default = False
! If true, sea-ice is rigid enough to exert a nonhydrostatic pressure that
! resist vertical motion.
SEA_ICE_RIGID_MASS = 100.0 ! [kg m-2] default = 1000.0
! The mass of sea-ice per unit area at which the sea-ice starts to exhibit
! rigidity
! === module MOM_restart ===
! === module MOM_file_parser ===