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MOM_parameter_doc.all_cn1GnMap12tp2
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MOM_parameter_doc.all_cn1GnMap12tp2
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! This file was written by the model and records all non-layout or debugging parameters used at run-time.
! === module MOM ===
SPLIT = True ! [Boolean] default = True
! Use the split time stepping if true.
CALC_RHO_FOR_SEA_LEVEL = False ! [Boolean] default = False
! If true, the in-situ density is used to calculate the
! effective sea level that is returned to the coupler. If false,
! the Boussinesq parameter RHO_0 is used.
ENABLE_THERMODYNAMICS = False ! [Boolean] default = True
! If true, Temperature and salinity are used as state
! variables.
USE_EOS = False ! [Boolean] default = False
! If true, density is calculated from temperature and
! salinity with an equation of state. If USE_EOS is
! true, ENABLE_THERMODYNAMICS must be true as well.
DIABATIC_FIRST = False ! [Boolean] default = False
! If true, apply diabatic and thermodynamic processes,
! including buoyancy forcing and mass gain or loss,
! before stepping the dynamics forward.
USE_CONTEMP_ABSSAL = False ! [Boolean] default = False
! If true, the prognostics T&S are the conservative temperature
! and absolute salinity. Care should be taken to convert them
! to potential temperature and practical salinity before
! exchanging them with the coupler and/or reporting T&S diagnostics.
ADIABATIC = False ! [Boolean] default = False
! There are no diapycnal mass fluxes if ADIABATIC is
! true. This assumes that KD = KDML = 0.0 and that
! there is no buoyancy forcing, but makes the model
! faster by eliminating subroutine calls.
USE_LEGACY_DIABATIC_DRIVER = True ! [Boolean] default = True
! If true, use the a legacy version of the diabatic subroutine.
! This is temporary and is needed avoid change in answers.
OFFLINE_TRACER_MODE = False ! [Boolean] default = False
! If true, barotropic and baroclinic dynamics, thermodynamics
! are all bypassed with all the fields necessary to integrate
! the tracer advection and diffusion equation are read in from
! files stored from a previous integration of the prognostic model.
! NOTE: This option only used in the ocean_solo_driver.
USE_REGRIDDING = False ! [Boolean] default = False
! If True, use the ALE algorithm (regridding/remapping).
! If False, use the layered isopycnal algorithm.
BULKMIXEDLAYER = False ! [Boolean] default = False
! If true, use a Kraus-Turner-like bulk mixed layer
! with transitional buffer layers. Layers 1 through
! NKML+NKBL have variable densities. There must be at
! least NKML+NKBL+1 layers if BULKMIXEDLAYER is true.
! BULKMIXEDLAYER can not be used with USE_REGRIDDING.
! The default is influenced by ENABLE_THERMODYNAMICS.
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.
BATHYMETRY_AT_VEL = False ! [Boolean] default = False
! If true, there are separate values for the basin depths
! at velocity points. Otherwise the effects of topography
! are entirely determined from thickness points.
DT = 5400.0 ! [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 = 5400.0 ! [s] default = 5400.0
! 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 = False ! [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.
HMIX_SFC_PROP = 100.0 ! [m] default = 1.0
! If BULKMIXEDLAYER is false, HMIX_SFC_PROP is the depth
! over which to average to find surface properties like
! SST and SSS or density (but not surface velocities).
HMIX_UV_SFC_PROP = 100.0 ! [m] default = 0.0
! If BULKMIXEDLAYER is false, HMIX_UV_SFC_PROP is the depth
! over which to average to find surface flow properties,
! SSU, SSV. A non-positive value indicates no averaging.
MIN_Z_DIAG_INTERVAL = 0.0 ! [s] default = 0.0
! The minimum amount of time in seconds between
! calculations of depth-space diagnostics. Making this
! larger than DT_THERM reduces the performance penalty
! of regridding to depth online.
INTERPOLATE_P_SURF = False ! [Boolean] default = False
! If true, linearly interpolate the surface pressure
! over the coupling time step, using the specified value
! at the end of the step.
DTBT_RESET_PERIOD = 0.0 ! [s] default = 5400.0
! The period between recalculations of DTBT (if DTBT <= 0).
! If DTBT_RESET_PERIOD is negative, DTBT is set based
! only on information available at initialization. If 0,
! DTBT will be set every dynamics time step. The default
! is set by DT_THERM. This is only used if SPLIT is true.
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.
CHECK_BAD_SURFACE_VALS = False ! [Boolean] default = False
! If true, check the surface state for ridiculous values.
SAVE_INITIAL_CONDS = True ! [Boolean] default = False
! If true, write the initial conditions to a file given
! by IC_OUTPUT_FILE.
IC_OUTPUT_FILE = "MOM_IC" ! default = "MOM_IC"
! The file into which to write the initial conditions.
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.
ENSEMBLE_OCEAN = False ! [Boolean] default = False
! If False, The model is being run in serial mode as a single realization.
! If True, The current model realization is part of a larger ensemble
! and at the end of step MOM, we will perform a gather of the ensemble
! members for statistical evaluation and/or data assimilation.
! === 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 = False ! [Boolean] default = False
! Use tripolar connectivity at the northern edge of the
! domain. With TRIPOLAR_N, NIGLOBAL must be even.
NIGLOBAL = 60 !
! 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 = 55 !
! 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.
! === module MOM_hor_index ===
! Sets the horizontal array index types.
! === module MOM_verticalGrid ===
! Parameters providing information about the vertical grid.
G_EARTH = 9.8 ! [m s-2] default = 9.8
! The gravitational acceleration of the Earth.
RHO_0 = 1035.0 ! [kg m-3] default = 1035.0
! The mean ocean density used with BOUSSINESQ true to
! calculate accelerations and the mass for conservation
! properties, or with BOUSSINSEQ false to convert some
! parameters from vertical units of m to kg m-2.
BOUSSINESQ = True ! [Boolean] default = True
! If true, make the Boussinesq approximation.
ANGSTROM = 1.0E-10 ! [m] default = 1.0E-10
! The minumum layer thickness, usually one-Angstrom.
H_TO_M = 1.0 ! [m H-1] default = 1.0
! A constant that translates the model's internal
! units of thickness into m.
NK = 30 ! [nondim]
! The number of model layers.
! === module MOM_fixed_initialization ===
INPUTDIR = "." ! default = "."
! The directory in which input files are found.
! === module MOM_grid_init ===
GRID_CONFIG = "mercator" !
! 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.
SOUTHLAT = -65.0 ! [degrees]
! The southern latitude of the domain.
LENLAT = 35.0 ! [degrees]
! The latitudinal length of the domain.
WESTLON = 0.0 ! [degrees] default = 0.0
! The western longitude of the domain.
LENLON = 60.0 ! [degrees]
! The longitudinal length of the domain.
RAD_EARTH = 6.378E+06 ! [m] default = 6.378E+06
! The radius of the Earth.
ISOTROPIC = True ! [Boolean] default = False
! If true, an isotropic grid on a sphere (also known as
! a Mercator grid) is used. With an isotropic grid, the
! meridional extent of the domain (LENLAT), the zonal
! extent (LENLON), and the number of grid points in each
! direction are _not_ independent. In MOM the meridional
! extent is determined to fit the zonal extent and the
! number of grid points, while grid is perfectly isotropic.
EQUATOR_REFERENCE = False ! [Boolean] default = True
! If true, the grid is defined to have the equator at the
! nearest q- or h- grid point to (-LOWLAT*NJGLOBAL/LENLAT).
LAT_ENHANCE_FACTOR = 1.0 ! [nondim] default = 1.0
! The amount by which the meridional resolution is
! enhanced within LAT_EQ_ENHANCE of the equator.
LAT_EQ_ENHANCE = 0.0 ! [degrees] default = 0.0
! The latitude range to the north and south of the equator
! over which the resolution is enhanced.
TOPO_CONFIG = "channel1" !
! 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.
! shoebox2 - use the shoebox2 test case topography.
! shoebox3 - use the shoebox3 test case topography.
! shoebox4 - use the shoebox4 test case topography.
! channel1 - use the channel1 test case topography.
! channel2 - use the channel2 test case topography.
! channel6 - use the channel6 test case topography.
! channel7 - use the channel7 test case topography.
! channel8 - use the channel8 test case topography.
! channel9 - use the channel9 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.
! === module channel1_initialize_topography ===
MAXIMUM_DEPTH = 4000.0 ! [m]
! The 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.
! === module MOM_open_boundary ===
! Controls where open boundaries are located, what kind of boundary condition to impose, and what data to apply, if any.
OBC_NUMBER_OF_SEGMENTS = 0 ! default = 0
! The number of open boundary segments.
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.
! === module MOM_tracer_registry ===
! === module MOM_restart ===
PARALLEL_RESTARTFILES = False ! [Boolean] default = False
! If true, each processor writes its own restart file,
! otherwise a single restart file is generated
RESTARTFILE = "MOM.res" ! default = "MOM.res"
! The name-root of the restart file.
LARGE_FILE_SUPPORT = True ! [Boolean] default = True
! If true, use the file-size limits with NetCDF large
! file support (4Gb), otherwise the limit is 2Gb.
MAX_FIELDS = 100 ! default = 100
! The maximum number of restart fields that can be used.
RESTART_CHECKSUMS_REQUIRED = False ! [Boolean] default = True
! If true, require the restart checksums to match and error out otherwise.
! Users may want to avoid this comparison if for example the restarts are
! made from a run with a different mask_table than the current run,
! in which case the checksums will not match and cause crash.
! === module MOM_tracer_flow_control ===
USE_USER_TRACER_EXAMPLE = False ! [Boolean] default = False
! If true, use the USER_tracer_example tracer package.
USE_DOME_TRACER = False ! [Boolean] default = False
! If true, use the DOME_tracer tracer package.
USE_ISOMIP_TRACER = False ! [Boolean] default = False
! If true, use the ISOMIP_tracer tracer package.
USE_IDEAL_AGE_TRACER = False ! [Boolean] default = False
! If true, use the ideal_age_example tracer package.
USE_REGIONAL_DYES = False ! [Boolean] default = False
! If true, use the regional_dyes tracer package.
USE_OIL_TRACER = False ! [Boolean] default = False
! If true, use the oil_tracer tracer package.
USE_ADVECTION_TEST_TRACER = False ! [Boolean] default = False
! If true, use the advection_test_tracer tracer package.
USE_OCMIP2_CFC = False ! [Boolean] default = False
! If true, use the MOM_OCMIP2_CFC tracer package.
USE_generic_tracer = False ! [Boolean] default = False
! If true and _USE_GENERIC_TRACER is defined as a
! preprocessor macro, use the MOM_generic_tracer packages.
USE_PSEUDO_SALT_TRACER = False ! [Boolean] default = False
! If true, use the pseudo salt tracer, typically run as a diagnostic.
USE_BOUNDARY_IMPULSE_TRACER = False ! [Boolean] default = False
! If true, use the boundary impulse tracer.
USE_DYED_OBC_TRACER = False ! [Boolean] default = False
! If true, use the dyed_obc_tracer tracer package.
! === 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.
GFS = 9.8 ! [m s-2] default = 9.8
! The reduced gravity at the free surface.
COORD_FILE = "coordinate8a.nc" !
! The file from which the coordinate densities are read.
COORD_VAR = "Layer" ! default = "Layer"
! The variable in COORD_FILE that is to be used for the
! coordinate densities.
! === module MOM_grid ===
! Parameters providing information about the lateral grid.
! === module MOM_state_initialization ===
SPONGE = False ! [Boolean] default = False
! If true, sponges may be applied anywhere in the domain.
! The exact location and properties of those sponges are
! specified via SPONGE_CONFIG.
! === module MOM_diag_mediator ===
NUM_DIAG_COORDS = 1 ! 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" ! default = "z Z ZSTAR"
! 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_MISVAL = 1.0E+20 ! [not defined] default = 1.0E+20
! Set the default missing value to use for diagnostics.
DIAG_AS_CHKSUM = False ! [Boolean] default = False
! Instead of writing diagnostics to the diag manager, write
! a textfile containing the checksum (bitcount) of the array.
AVAILABLE_DIAGS_FILE = "available_diags.000000" ! default = "available_diags.000000"
! A file into which to write a list of all available
! ocean diagnostics that can be included in a diag_table.
DIAG_COORD_DEF_Z = "WOA09" ! default = "WOA09"
! Determines how to specify the coordinate
! resolution. Valid options are:
! PARAM - use the vector-parameter DIAG_COORD_RES_Z
! 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_DAMPING = 0.0 ! [s-1] default = 0.0
! The local depth-indepented MEKE dissipation rate.
MEKE_CD_SCALE = 0.0 ! [nondim] default = 0.0
! The ratio of the bottom eddy velocity to the column mean
! eddy velocity, i.e. sqrt(2*MEKE). This should be less than 1
! to account for the surface intensification of MEKE.
MEKE_CB = 25.0 ! [nondim] default = 25.0
! A coefficient in the expression for the ratio of bottom projected
! eddy energy and mean column energy (see Jansen et al. 2015).
MEKE_MIN_GAMMA2 = 1.0E-04 ! [nondim] default = 1.0E-04
! The minimum allowed value of gamma_b^2.
MEKE_CT = 50.0 ! [nondim] default = 50.0
! A coefficient in the expression for the ratio of barotropic
! eddy energy and mean column energy (see Jansen et al. 2015).
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_FRCOEFF = -1.0 ! [nondim] default = -1.0
! The efficiency of the conversion of mean energy into
! MEKE. If MEKE_FRCOEFF is negative, this conversion
! is not used or calculated.
MEKE_BGSRC = 0.0 ! [W kg-1] default = 0.0
! A background energy source for MEKE.
MEKE_KH = 1000.0 ! [m2 s-1] default = -1.0
! A background lateral diffusivity of MEKE.
! Use a negative value to not apply lateral diffusion to MEKE.
MEKE_K4 = 0.0 ! [m4 s-1] default = -1.0
! A lateral bi-harmonic diffusivity of MEKE.
! Use a negative value to not apply bi-harmonic diffusion to MEKE.
MEKE_DTSCALE = 1.0 ! [nondim] default = 1.0
! A scaling factor to accelerate the time evolution of MEKE.
MEKE_KHCOEFF = 1.0 ! [nondim] default = 1.0
! A scaling factor in the expression for eddy diffusivity
! which is otherwise proportional to the MEKE velocity-
! scale times an eddy mixing-length. This factor
! must be >0 for MEKE to contribute to the thickness/
! and tracer diffusivity in the rest of the model.
MEKE_USCALE = 0.0 ! [m s-1] default = 0.0
! The background velocity that is combined with MEKE to
! calculate the bottom drag.
MEKE_VISC_DRAG = True ! [Boolean] default = True
! If true, use the vertvisc_type to calculate the bottom
! drag acting on MEKE.
MEKE_KHTH_FAC = 1.0 ! [nondim] default = 0.0
! A factor that maps MEKE%Kh to KhTh.
MEKE_KHTR_FAC = 0.0 ! [nondim] default = 0.0
! A factor that maps MEKE%Kh to KhTr.
MEKE_KHMEKE_FAC = 0.0 ! [nondim] default = 0.0
! A factor that maps MEKE%Kh to Kh for MEKE itself.
MEKE_OLD_LSCALE = False ! [Boolean] default = False
! If true, use the old formula for length scale which is
! a function of grid spacing and deformation radius.
MEKE_RD_MAX_SCALE = False ! [nondim] default = False
! If true, the length scale used by MEKE is the minimum of
! the deformation radius or grid-spacing. Only used if
! MEKE_OLD_LSCALE=True
MEKE_VISCOSITY_COEFF = 0.0 ! [nondim] default = 0.0
! If non-zero, is the scaling coefficient in the expression for
! viscosity used to parameterize lateral momentum mixing by
! unresolved eddies represented by MEKE. Can be negative to
! represent backscatter from the unresolved eddies.
MEKE_FIXED_MIXING_LENGTH = 0.0 ! [m] default = 0.0
! If positive, is a fixed length contribution to the expression
! for mixing length used in MEKE-derived diffusiviity.
MEKE_ALPHA_DEFORM = 0.0 ! [nondim] default = 0.0
! If positive, is a coefficient weighting the deformation scale
! in the expression for mixing length used in MEKE-derived diffusiviity.
MEKE_ALPHA_RHINES = 0.12 ! [nondim] default = 0.05
! If positive, is a coefficient weighting the Rhines scale
! in the expression for mixing length used in MEKE-derived diffusiviity.
MEKE_ALPHA_EADY = 0.12 ! [nondim] default = 0.05
! If positive, is a coefficient weighting the Eady length scale
! in the expression for mixing length used in MEKE-derived diffusiviity.
MEKE_ALPHA_FRICT = 0.0 ! [nondim] default = 0.0
! If positive, is a coefficient weighting the frictional arrest scale
! in the expression for mixing length used in MEKE-derived diffusiviity.
MEKE_ALPHA_GRID = 0.12 ! [nondim] default = 0.0
! If positive, is a coefficient weighting the grid-spacing as a scale
! in the expression for mixing length used in MEKE-derived diffusiviity.
MEKE_COLD_START = False ! [Boolean] default = False
! If true, initialize EKE to zero. Otherwise a local equilibrium solution
! is used as an initial condition for EKE.
MEKE_BACKSCAT_RO_C = 0.0 ! [nondim] default = 0.0
! The coefficient in the Rossby number function for scaling the buharmonic
! frictional energy source. Setting to non-zero enables the Rossby number function.
MEKE_BACKSCAT_RO_POW = 0.0 ! [nondim] default = 0.0
! The power in the Rossby number function for scaling the biharmomnic
! frictional energy source.
MEKE_ADVECTION_FACTOR = 0.0 ! [nondim] default = 0.0
! A scale factor in front of advection of eddy energy. Zero turns advection off.
! Using unity would be normal but other values could accomodate a mismatch
! between the advecting barotropic flow and the vertical structure of MEKE.
MEKE_TOPOGRAPHIC_BETA = 1.0 ! [nondim] default = 0.0
! A scale factor to determine how much topographic beta is weighed in computing beta in the expression of Rhines scale. Use 1 if full topographic beta effect is considered; use 0 if it's completely ignored.
CDRAG = 0.003 ! [nondim] default = 0.003
! CDRAG is the drag coefficient relating the magnitude of
! the velocity field to the bottom stress.
! === 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 = False ! [Boolean] default = False
! If true, the Laplacian lateral viscosity is scaled away
! when the first baroclinic deformation radius is well
! resolved.
RESOLN_SCALED_KHTH = False ! [Boolean] default = False
! If true, the interface depth diffusivity is scaled away
! when the first baroclinic deformation radius is well
! resolved.
RESOLN_SCALED_KHTR = False ! [Boolean] default = False
! If true, the epipycnal tracer diffusivity is scaled
! away when the first baroclinic deformation radius is
! well resolved.
RESOLN_USE_EBT = False ! [Boolean] default = False
! If true, uses the equivalent barotropic wave speed instead
! of first baroclinic wave for calculating the resolution fn.
KHTH_USE_EBT_STRUCT = False ! [Boolean] default = False
! If true, uses the equivalent barotropic structure
! as the vertical structure of thickness diffusivity.
KHTH_SLOPE_CFF = 0.0 ! [nondim] default = 0.0
! The nondimensional coefficient in the Visbeck formula
! for the interface depth diffusivity
KHTR_SLOPE_CFF = 0.0 ! [nondim] default = 0.0
! The nondimensional coefficient in the Visbeck formula
! for the epipycnal tracer diffusivity
USE_STORED_SLOPES = False ! [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.
VARMIX_KTOP = 2 ! [nondim] default = 2
! The layer number at which to start vertical integration
! of S*N for purposes of finding the Eady growth rate.
! === module MOM_set_visc ===
BOTTOMDRAGLAW = True ! [Boolean] default = True
! If true, the bottom stress is calculated with a drag
! law of the form c_drag*|u|*u. The velocity magnitude
! may be an assumed value or it may be based on the
! actual velocity in the bottommost HBBL, depending on
! LINEAR_DRAG.
CHANNEL_DRAG = False ! [Boolean] default = False
! If true, the bottom drag is exerted directly on each
! layer proportional to the fraction of the bottom it
! overlies.
LINEAR_DRAG = False ! [Boolean] default = False
! If LINEAR_DRAG and BOTTOMDRAGLAW are defined the drag
! law is cdrag*DRAG_BG_VEL*u.
DOUBLE_DIFFUSION = False ! [Boolean] default = False
! If true, increase diffusivitives for temperature or salt
! based on double-diffusive paramaterization from MOM4/KPP.
PRANDTL_TURB = 0.0 ! [nondim] default = 1.0
! The turbulent Prandtl number applied to shear
! instability.
DYNAMIC_VISCOUS_ML = True ! [Boolean] default = False
! If true, use a bulk Richardson number criterion to
! determine the mixed layer thickness for viscosity.
BULK_RI_ML_VISC = 0.0 ! [nondim] default = 0.0
! The efficiency with which mean kinetic energy released
! by mechanically forced entrainment of the mixed layer
! is converted to turbulent kinetic energy. By default,
! BULK_RI_ML_VISC = BULK_RI_ML or 0.
TKE_DECAY_VISC = 0.0 ! [nondim] default = 0.0
! TKE_DECAY_VISC relates the vertical rate of decay of
! the TKE available for mechanical entrainment to the
! natural Ekman depth for use in calculating the dynamic
! mixed layer viscosity. By default,
! TKE_DECAY_VISC = TKE_DECAY or 0.
ML_OMEGA_FRAC = 1.0 ! [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).
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 = False ! [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.
HTBL_SHELF_MIN = 0.1 ! [m] default = 0.1
! The minimum top boundary layer thickness that can be
! used with BOTTOMDRAGLAW. This might be
! Kv / (cdrag * drag_bg_vel) to give Kv as the minimum
! near-top viscosity.
HTBL_SHELF = 10.0 ! [m] default = 10.0
! The thickness over which near-surface velocities are
! averaged for the drag law under an ice shelf. By
! default this is the same as HBBL
KV = 1.0E-06 ! [m2 s-1]
! The background kinematic viscosity in the interior.
! The molecular value, ~1e-6 m2 s-1, may be used.
ADD_KV_SLOW = False ! [Boolean] default = False
! If true, the background vertical viscosity in the interior
! (i.e., tidal + background + shear + convenction) is addded
! when computing the coupling coefficient. The purpose of this
! flag is to be able to recover previous answers and it will likely
! be removed in the future since this option should always be true.
KV_BBL_MIN = 1.0E-06 ! [m2 s-1] default = 1.0E-06
! The minimum viscosities in the bottom boundary layer.
KV_TBL_MIN = 1.0E-06 ! [m2 s-1] default = 1.0E-06
! The minimum viscosities in the top boundary layer.
TIDES = False ! [Boolean] default = False
! If true, apply tidal momentum forcing.
BE = 0.6 ! [nondim] default = 0.6
! If SPLIT is true, BE determines the relative weighting
! of a 2nd-order Runga-Kutta baroclinic time stepping
! scheme (0.5) and a backward Euler scheme (1) that is
! used for the Coriolis and inertial terms. BE may be
! from 0.5 to 1, but instability may occur near 0.5.
! BE is also applicable if SPLIT is false and USE_RK2
! is true.
BEGW = 0.0 ! [nondim] default = 0.0
! If SPLIT is true, BEGW is a number from 0 to 1 that
! controls the extent to which the treatment of gravity
! waves is forward-backward (0) or simulated backward
! Euler (1). 0 is almost always used.
! If SPLIT is false and USE_RK2 is true, BEGW can be
! between 0 and 0.5 to damp gravity waves.
SPLIT_BOTTOM_STRESS = False ! [Boolean] default = False
! If true, provide the bottom stress calculated by the
! vertical viscosity to the barotropic solver.
BT_USE_LAYER_FLUXES = True ! [Boolean] default = True
! If true, use the summed layered fluxes plus an
! adjustment due to the change in the barotropic velocity
! in the barotropic continuity equation.
! === module MOM_continuity ===
CONTINUITY_SCHEME = "PPM" ! default = "PPM"
! CONTINUITY_SCHEME selects the discretization for the
! continuity solver. The only valid value currently is:
! PPM - use a positive-definite (or monotonic)
! piecewise parabolic reconstruction solver.
! === module MOM_continuity_PPM ===
MONOTONIC_CONTINUITY = False ! [Boolean] default = False
! If true, CONTINUITY_PPM uses the Colella and Woodward
! monotonic limiter. The default (false) is to use a
! simple positive definite limiter.
SIMPLE_2ND_PPM_CONTINUITY = False ! [Boolean] default = False
! If true, CONTINUITY_PPM uses a simple 2nd order
! (arithmetic mean) interpolation of the edge values.
! This may give better PV conservation propterties. While
! it formally reduces the accuracy of the continuity
! solver itself in the strongly advective limit, it does
! not reduce the overall order of accuracy of the dynamic
! core.
UPWIND_1ST_CONTINUITY = False ! [Boolean] default = False
! If true, CONTINUITY_PPM becomes a 1st-order upwind
! continuity solver. This scheme is highly diffusive
! but may be useful for debugging or in single-column
! mode where its minimal stencil is useful.
ETA_TOLERANCE = 1.0E-06 ! [m] default = 1.5E-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 x
! than about 10^-15*MAXIMUM_DEPTH.
ETA_TOLERANCE_AUX = 1.0E-06 ! [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.
VELOCITY_TOLERANCE = 0.001 ! [m s-1] default = 3.0E+08
! The tolerance for barotropic velocity discrepancies
! between the barotropic solution and the sum of the
! layer thicknesses.
CONT_PPM_AGGRESS_ADJUST = False ! [Boolean] default = False
! If true, allow the adjusted velocities to have a
! relative CFL change up to 0.5.
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. The
! default is set by CONT_PPM_AGGRESS_ADJUST.
CONTINUITY_CFL_LIMIT = 0.5 ! [nondim] default = 0.5
! The maximum CFL of the adjusted velocities.
CONT_PPM_BETTER_ITER = True ! [Boolean] default = True
! If true, stop corrective iterations using a velocity
! based criterion and only stop if the iteration is
! better than all predecessors.
CONT_PPM_USE_VISC_REM_MAX = True ! [Boolean] default = True
! If true, use more appropriate limiting bounds for
! corrections in strongly viscous columns.
CONT_PPM_MARGINAL_FACE_AREAS = True ! [Boolean] default = True
! If true, use the marginal face areas from the continuity
! solver for use as the weights in the barotropic solver.
! Otherwise use the transport averaged areas.
! === module MOM_CoriolisAdv ===
NOSLIP = False ! [Boolean] default = False
! If true, no slip boundary conditions are used; otherwise
! free slip boundary conditions are assumed. The
! implementation of the free slip BCs on a C-grid is much
! cleaner than the no slip BCs. The use of free slip BCs
! is strongly encouraged, and no slip BCs are not used with
! the biharmonic viscosity.
CORIOLIS_EN_DIS = False ! [Boolean] default = False
! If true, two estimates of the thickness fluxes are used
! to estimate the Coriolis term, and the one that
! dissipates energy relative to the other one is used.
CORIOLIS_SCHEME = "SADOURNY75_ENERGY" ! 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.
KE_SCHEME = "KE_ARAKAWA" ! default = "KE_ARAKAWA"
! KE_SCHEME selects the discretization for acceleration
! due to the kinetic energy gradient. Valid values are:
! KE_ARAKAWA, KE_SIMPLE_GUDONOV, KE_GUDONOV
PV_ADV_SCHEME = "PV_ADV_CENTERED" ! default = "PV_ADV_CENTERED"
! PV_ADV_SCHEME selects the discretization for PV
! advection. Valid values are:
! PV_ADV_CENTERED - centered (aka Sadourny, 75)
! PV_ADV_UPWIND1 - upwind, first order
! === module MOM_PressureForce ===
ANALYTIC_FV_PGF = True ! [Boolean] default = True
! If true the pressure gradient forces are calculated
! with a finite volume form that analytically integrates
! the equations of state in pressure to avoid any
! possibility of numerical thermobaric instability, as
! described in Adcroft et al., O. Mod. (2008).
! === module MOM_PressureForce_AFV ===
MASS_WEIGHT_IN_PRESSURE_GRADIENT = False ! [Boolean] default = False
! If true, use mass weighting when interpolating T/S for
! integrals near the bathymetry in AFV pressure gradient
! calculations.
RECONSTRUCT_FOR_PRESSURE = False ! [Boolean] default = False
! If True, use vertical reconstruction of T & S within
! the integrals of the FV pressure gradient calculation.
! If False, use the constant-by-layer algorithm.
! The default is set by USE_REGRIDDING.
PRESSURE_RECONSTRUCTION_SCHEME = 1 ! default = 1
! Order of vertical reconstruction of T/S to use in the
! integrals within the FV pressure gradient calculation. 0: PCM or no reconstruction.
! 1: PLM reconstruction.
! 2: PPM reconstruction.
BOUNDARY_EXTRAPOLATION_PRESSURE = True ! [Boolean] default = True
! If true, the reconstruction of T & S for pressure in
! boundary cells is extrapolated, rather than using PCM
! in these cells. If true, the same order polynomial is
! used as is used for the interior cells.
! === module MOM_hor_visc ===
LAPLACIAN = False ! [Boolean] default = False
! If true, use a Laplacian horizontal viscosity.
BIHARMONIC = True ! [Boolean] default = True
! If true, use a biharmonic horizontal viscosity.
! BIHARMONIC may be used with LAPLACIAN.
AH = 0.0 ! [m4 s-1] default = 0.0
! The background biharmonic horizontal viscosity.
AH_VEL_SCALE = 0.05 ! [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.
LEITH_AH = False ! [Boolean] default = False
! If true, use a biharmonic Leith nonlinear eddy
! viscosity.
BOUND_AH = True ! [Boolean] default = True
! If true, the biharmonic coefficient is locally limited
! to be stable.
BETTER_BOUND_AH = True ! [Boolean] default = True
! If true, the biharmonic coefficient is locally limited
! to be stable with a better bounding than just BOUND_AH.
SMAG_BI_CONST = 0.06 ! [nondim] default = 0.0
! The nondimensional biharmonic Smagorinsky constant,
! typically 0.015 - 0.06.
BOUND_CORIOLIS_BIHARM = True ! [Boolean] default = True
! If true use a viscosity that increases with the square
! of the velocity shears, so that the resulting viscous
! drag is of comparable magnitude to the Coriolis terms
! when the velocity differences between adjacent grid
! points is 0.5*BOUND_CORIOLIS_VEL. The default is the
! value of BOUND_CORIOLIS (or false).
BOUND_CORIOLIS_VEL = 100.0 ! [m s-1] default = 100.0
! The velocity scale at which BOUND_CORIOLIS_BIHARM causes
! the biharmonic drag to have comparable magnitude to the
! Coriolis acceleration. The default is set by MAXVEL.
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.
HORVISC_BOUND_COEF = 0.8 ! [nondim] default = 0.8
! The nondimensional coefficient of the ratio of the
! viscosity bounds to the theoretical maximum for
! stability without considering other terms.
USE_KH_BG_2D = False ! [Boolean] default = False
! If true, read a file containing 2-d background harmonic
! viscosities. The final viscosity is the maximum of the other terms and this background value.
! === module MOM_vert_friction ===
DIRECT_STRESS = True ! [Boolean] default = False
! If true, the wind stress is distributed over the
! topmost HMIX_STRESS of fluid (like in HYCOM), and KVML
! may be set to a very small value.
HARMONIC_VISC = False ! [Boolean] default = False
! If true, use the harmonic mean thicknesses for
! calculating the vertical viscosity.
HARMONIC_BL_SCALE = 0.0 ! [nondim] default = 0.0
! A scale to determine when water is in the boundary
! layers based solely on harmonic mean thicknesses for
! the purpose of determining the extent to which the
! thicknesses used in the viscosities are upwinded.
HMIX_FIXED = 100.0 ! [m]
! The prescribed depth over which the near-surface
! viscosity and diffusivity are elevated when the bulk
! mixed layer is not used.
HMIX_STRESS = 100.0 ! [m] default = 100.0
! The depth over which the wind stress is applied if
! DIRECT_STRESS is true.
KVML = 0.01 ! [m2 s-1] default = 1.0E-06
! The kinematic viscosity in the mixed layer. A typical
! value is ~1e-2 m2 s-1. KVML is not used if
! BULKMIXEDLAYER is true. The default is set by KV.
MAXVEL = 100.0 ! [m s-1] default = 3.0E+08
! The maximum velocity allowed before the velocity
! components are truncated.
CFL_BASED_TRUNCATIONS = True ! [Boolean] default = True
! If true, base truncations on the CFL number, and not an
! absolute speed.
CFL_TRUNCATE = 0.5 ! [nondim] default = 0.5
! The value of the CFL number that will cause velocity
! components to be truncated; instability can occur past 0.5.
CFL_REPORT = 0.5 ! [nondim] default = 0.5
! The value of the CFL number that causes accelerations
! to be reported; the default is CFL_TRUNCATE.
CFL_TRUNCATE_RAMP_TIME = 0.0 ! [s] default = 0.0
! The time over which the CFL trunction value is ramped
! up at the beginning of the run.
CFL_TRUNCATE_START = 0.0 ! [nondim] default = 0.0
! The start value of the truncation CFL number used when
! ramping up CFL_TRUNC.
STOKES_MIXING_COMBINED = False ! [Boolean] default = False
! Flag to use Stokes drift Mixing via the Lagrangian
! current (Eulerian plus Stokes drift).
! Still needs work and testing, so not recommended for use.
VEL_UNDERFLOW = 0.0 ! [m s-1] default = 0.0
! A negligibly small velocity magnitude below which velocity
! components are set to 0. A reasonable value might be
! 1e-30 m/s, which is less than an Angstrom divided by
! the age of the universe.
! === 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_CONT_CORR_BOUNDS = True ! [Boolean] default = True
! If true, and BOUND_BT_CORRECTION is true, use the
! BT_cont_type variables to set limits determined by
! MAXCFL_BT_CONT on the CFL number of the velocites
! that are likely to be driven by the corrective mass fluxes.
ADJUST_BT_CONT = False ! [Boolean] default = False
! If true, adjust the curve fit to the BT_cont type
! that is used by the barotropic solver to match the
! transport about which the flow is being linearized.
GRADUAL_BT_ICS = False ! [Boolean] default = False
! If true, adjust the initial conditions for the
! barotropic solver to the values from the layered
! solution over a whole timestep instead of instantly.
! This is a decent approximation to the inclusion of
! sum(u dh_dt) while also correcting for truncation errors.
BT_USE_VISC_REM_U_UH0 = False ! [Boolean] default = False
! If true, use the viscous remnants when estimating the
! barotropic velocities that were used to calculate uh0
! and vh0. False is probably the better choice.
USE_BT_CONT_TYPE = True ! [Boolean] default = True
! If true, use a structure with elements that describe
! effective face areas from the summed continuity solver
! as a function the barotropic flow in coupling between
! the barotropic and baroclinic flow. This is only used
! if SPLIT is true.
NONLINEAR_BT_CONTINUITY = True ! [Boolean] default = False
! If true, use nonlinear transports in the barotropic
! continuity equation. This does not apply if
! USE_BT_CONT_TYPE is true.
NONLIN_BT_CONT_UPDATE_PERIOD = 1 ! [nondim] default = 1
! If NONLINEAR_BT_CONTINUITY is true, this is the number
! of barotropic time steps between updates to the face
! areas, or 0 to update only before the barotropic stepping.
BT_PROJECT_VELOCITY = True ! [Boolean] default = False
! If true, step the barotropic velocity first and project
! out the velocity tendancy 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 = False ! [Boolean] default = False
! If true, add a dynamic pressure due to a viscous ice
! shelf, for instance.
SADOURNY = True ! [Boolean] default = True
! If true, the Coriolis terms are discretized with the
! Sadourny (1975) energy conserving scheme, otherwise
! the Arakawa & Hsu scheme is used. If the internal
! deformation radius is not resolved, the Sadourny scheme
! should probably be used.
BT_THICK_SCHEME = "FROM_BT_CONT" ! default = "FROM_BT_CONT"
! A string describing the scheme that is used to set the
! open face areas used for barotropic transport and the
! relative weights of the accelerations. Valid values are:
! ARITHMETIC - arithmetic mean layer thicknesses
! HARMONIC - harmonic mean layer thicknesses
! HYBRID (the default) - use arithmetic means for
! layers above the shallowest bottom, the harmonic
! mean for layers below, and a weighted average for
! layers that straddle that depth
! FROM_BT_CONT - use the average thicknesses kept
! in the h_u and h_v fields of the BT_cont_type
BT_STRONG_DRAG = False ! [Boolean] default = False
! If true, use a stronger estimate of the retarding
! effects of strong bottom drag, by making it implicit
! with the barotropic time-step instead of implicit with
! the baroclinic time-step and dividing by the number of
! barotropic steps.
BT_LINEAR_WAVE_DRAG = False ! [Boolean] default = False
! If true, apply a linear drag to the barotropic velocities,
! using rates set by lin_drag_u & _vdivided by the depth of
! the ocean. This was introduced to facilitate tide modeling.
CLIP_BT_VELOCITY = False ! [Boolean] default = False
! If true, limit any velocity components that exceed
! CFL_TRUNCATE. This should only be used as a desperate
! debugging measure.
MAXCFL_BT_CONT = 0.25 ! [nondim] default = 0.25
! The maximum permitted CFL number associated with the
! barotropic accelerations from the summed velocities
! times the time-derivatives of thicknesses.
DT_BT_FILTER = -0.25 ! [sec or nondim] default = -0.25
! A time-scale over which the barotropic mode solutions
! are filtered, in seconds if positive, or as a fraction
! of DT if negative. When used this can never be taken to
! be longer than 2*dt. Set this to 0 to apply no filtering.
G_BT_EXTRA = 0.0 ! [nondim] default = 0.0
! A nondimensional factor by which gtot is enhanced.
SSH_EXTRA = 10.0 ! [m] default = 10.0
! An estimate of how much higher SSH might get, for use
! in calculating the safe external wave speed. The
! default is the minimum of 10 m or 5% of MAXIMUM_DEPTH.
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 = -0.95 ! [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 = False ! [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_thickness_diffuse ===
KHTH = 0.0 ! [m2 s-1] default = 0.0
! The background horizontal thickness diffusivity.
KHTH_MIN = 0.0 ! [m2 s-1] default = 0.0
! The minimum horizontal thickness diffusivity.
KHTH_MAX = 0.0 ! [m2 s-1] default = 0.0
! The maximum horizontal thickness diffusivity.
KHTH_MAX_CFL = 0.8 ! [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.