Modules

adjustment_initialization	Configures the model for the geostrophic adjustment test case.
advection_test_tracer	This tracer package is used to test advection schemes.
atmos_ocean_fluxes_mod	A dummy version of atmos_ocean_fluxes_mod() module for use when the vastly larger FMS package is not needed.
baroclinic_zone_initialization	Initial conditions for an idealized baroclinic zone.
basin_builder	An idealized topography building system.
benchmark_initialization	Initialization for the "bench mark" configuration.
bfb_initialization	Initialization of the boundary-forced-basing configuration.
bfb_surface_forcing	Surface forcing for the boundary-forced-basin (BFB) configuration.
boundary_impulse_tracer	Implements a boundary impulse response tracer to calculate Green's functions.
circle_obcs_initialization	Configures the model for the "circle_obcs" experiment which tests Open Boundary Conditions radiating an SSH anomaly.
coord_adapt	Regrid columns for the adaptive coordinate.
coord_hycom	Regrid columns for the HyCOM coordinate.
coord_rho	Regrid columns for the continuous isopycnal (rho) coordinate.
coord_sigma	Regrid columns for the sigma coordinate.
coord_zlike	Regrid columns for a z-like coordinate (z-star, z-level)
database_client_interface	<undocumented>
dense_water_initialization	Initialization routines for the dense water formation and overflow experiment.
dome2d_initialization	Initialization of the 2D DOME experiment with density water initialized on a coastal shelf.
dome_initialization	Configures the model for the "DOME" experiment.
dome_tracer	A tracer package that is used as a diagnostic in the DOME experiments.
dumbbell_initialization	Configures the model for the idealized dumbbell test case.
dumbbell_surface_forcing	Surface forcing for the dumbbell test case.
dyed_channel_initialization	Initialization for the dyed_channel configuration.
dyed_obc_tracer	This tracer package dyes flow through open boundaries.
dyed_obcs_initialization	Dyed open boundary conditions; OBC_USER_CONFIG="dyed_obcs".
external_gwave_initialization	Initialization for the "external gravity wave wave" configuration.
get_stochy_pattern_mod	<undocumented>
harmonic_analysis	Major revision (August, 2025)
ideal_age_example	A tracer package of ideal age tracers.
idealized_hurricane	Forcing for the idealized hurricane and SCM_idealized_hurricane examples.
isomip_initialization	Configures the ISOMIP test case.
isomip_tracer	Routines used to set up and use a set of (one for now) dynamically passive tracers in the ISOMIP configuration.
kdtree	A null version of K-d tree from geoKdTree.
kelvin_initialization	Configures the model for the Kelvin wave experiment.
lock_exchange_initialization	Initialization of the "lock exchange" experiment.
marbl_constants_mod	A non-functioning template of the MARBL constants module.
marbl_forcing_mod	This module provides a common datatype to provide forcing for MARBL tracers regardless of driver.
marbl_interface	A non-functioning template of the MARBL interface.
marbl_interface_public_types	A non-functioning template of the public structures provided through MARBL interface.
marbl_logging	A non-functioning template of the MARBL logging module.
marbl_tracers	A tracer package for tracers computed in the MARBL library.
MARBL_tracers	<undocumented>
meso_surface_forcing	Sets forcing for the MESO configuration.
mom	The central module of the MOM6 ocean model.
mom_ale	This module contains the main regridding routines.
mom_ale_sponge	This module contains the routines used to apply sponge layers when using the ALE mode.
mom_ann	Implements the general purpose Artificial Neural Network (ANN).
mom_array_transform	Module for supporting the rotation of a field's index map.
mom_barotropic	Barotropic solver.
mom_bkgnd_mixing	Interface to background mixing schemes, including the Bryan and Lewis (1979) which is applied via CVMix.
mom_boundary_update	Controls where open boundary conditions are applied.
mom_bulk_mixed_layer	Build mixed layer parameterization.
mom_CFC_cap	<undocumented>
mom_cfc_cap	Simulates CFCs using atmospheric pressure, wind speed and sea ice cover provided via cap (only NUOPC cap is implemented so far).
mom_check_scaling	This module is used to check the dimensional scaling factors used by the MOM6 ocean model.
mom_checksum_packages	Provides routines that do checksums of groups of MOM variables.
mom_checksums	Routines to calculate checksums of various array and vector types.
mom_coms	Interfaces to non-domain-oriented communication subroutines, including the MOM6 reproducing sums facility.
mom_continuity	Solve the layer continuity equation.
mom_continuity_ppm	Solve the layer continuity equation using the PPM method for layer fluxes.
mom_controlled_forcing	Use control-theory to adjust the surface heat flux and precipitation.
mom_coord_initialization	Initializes fixed aspects of the related to its vertical coordinate.
mom_coriolisadv	Accelerations due to the Coriolis force and momentum advection.
mom_coupler_types	This module provides coupler type interfaces for use by MOM6.
mom_cpu_clock	Provides cpu clock functions.
mom_cvmix_conv	Interface to CVMix convection scheme.
mom_cvmix_ddiff	Interface to CVMix double diffusion scheme.
mom_cvmix_kpp	Provides the K-Profile Parameterization (KPP) of Large et al., 1994, via CVMix.
mom_cvmix_shear	Interface to CVMix interior shear schemes.
mom_data_override	These interfaces allow for ocean or sea-ice variables to be replaced with data.
MOM_data_override	Public functions: mom_data_override_infra:impose_data_init.
mom_database_comms	Contains routines necessary to initialize communication with a database.
mom_debugging	Provides checksumming functions for debugging.
mom_density_integrals	Provides integrals of density.
mom_diabatic_aux	Provides functions for some diabatic processes such as frazil, brine rejection, tendency due to surface flux divergence.
mom_diabatic_driver	This routine drives the diabatic/dianeutral physics for MOM.
mom_diag_buffers	Provides buffers that can dynamically grow as needed.
mom_diag_mediator	The subroutines here provide convenient wrappers to the FMS diag_manager interfaces with additional diagnostic capabilities.
mom_diag_remap	provides runtime remapping of diagnostics to z star, sigma and rho vertical coordinates.
mom_diagnose_kdwork	Provides diagnostics of work due to a given diffusivity.
mom_diagnose_mld	Provides functions for some diabatic processes such as fraxil, brine rejection, tendency due to surface flux divergence.
mom_diagnostics	Calculates any requested diagnostic quantities that are not calculated in the various subroutines.
mom_diapyc_energy_req	Calculates the energy requirements of mixing.
mom_document	The subroutines here provide hooks for document generation functions at various levels of granularity.
mom_domains	Describes the decomposed MOM domain and has routines for communications across PEs.
mom_dyn_horgrid	Contains a shareable dynamic type for describing horizontal grids and metric data and utilty routines that work on this type.
mom_dynamics_split_rk2	Time step the adiabatic dynamic core of MOM using RK2 method.
mom_dynamics_split_rk2b	Time step the adiabatic dynamic core of MOM using RK2 method with greater use of the time-filtered velocities and less inheritance of tedencies from the previous step in the predictor step than in the original MOM_dyanmics_split_RK2.
mom_dynamics_unsplit	Time steps the ocean dynamics with an unsplit quasi 3rd order scheme.
mom_dynamics_unsplit_rk2	Time steps the ocean dynamics with an unsplit quasi 2nd order Runge-Kutta scheme.
MOM_energetic_PBL	By Robert Hallberg, 2015.
mom_energetic_pbl	Energetically consistent planetary boundary layer parameterization.
mom_ensemble_manager	Manages ensemble member layout information.
mom_entrain_diffusive	Diapycnal mixing and advection in isopycnal mode.
mom_eos	Provides subroutines for quantities specific to the equation of state.
mom_eos_base_type	A generic type for equations of state.
mom_eos_jackett06	The equation of state using the Jackett et al 2006 expressions that are often used in Hycom.
mom_eos_Jackett06	<undocumented>
mom_eos_linear	A simple linear equation of state for sea water with constant coefficients.
mom_eos_roquet_rho	The equation of state using the expressions of Roquet et al.
mom_eos_Roquet_rho	<undocumented>
mom_eos_Roquet_SpV	<undocumented>
mom_eos_roquet_spv	The equation of state for specific volume (SpV) using the expressions of Roquet et al.
mom_eos_teos10	The equation of state using the TEOS10 expressions.
mom_eos_UNESCO	<undocumented>
mom_eos_unesco	The equation of state using the Jackett and McDougall fits to the UNESCO EOS.
mom_eos_wright	The equation of state using a poor implementation (missing parenthesis and bugs) of the reduced range Wright 1997 expressions.
mom_eos_wright_full	The equation of state using the Wright 1997 expressions with full range of data.
mom_eos_wright_red	The equation of state using the Wright 1997 expressions with reduced range of data.
mom_error_handler	Routines for error handling and I/O management.
mom_file_parser	The MOM6 facility to parse input files for runtime parameters.
mom_file_parser_tests	<undocumented>
mom_fixed_initialization	Initializes fixed aspects of the model, such as horizontal grid metrics, topography and Coriolis.
mom_forcing_type	This module implements boundary forcing for MOM6.
mom_full_convection	Does full convective adjustment of unstable regions via a strong diffusivity.
mom_generic_tracer	Drives the generic version of tracers TOPAZ and CFC and other GFDL BGC components.
mom_geothermal	Implemented geothermal heating at the ocean bottom.
mom_get_input	Reads the only Fortran name list needed to boot-strap the model.
mom_grid	Provides the ocean grid type.
mom_grid_initialize	Initializes horizontal grid.
mom_harmonic_analysis	Inline harmonic analysis (conventional)
mom_hor_bnd_diffusion	Calculates and applies diffusive fluxes as a parameterization of horizontal mixing (non-neutral) by mesoscale eddies near the top and bottom (to be implemented) boundary layers of the ocean.
mom_hor_index	Defines the horizontal index type (hor_index_type()) used for providing index ranges.
mom_hor_visc	Calculates horizontal viscosity and viscous stresses.
mom_horizontal_regridding	Horizontal interpolation.
mom_hybgen_regrid	This module contains the hybgen regridding routines from HYCOM, with minor modifications to follow the MOM6 coding conventions.
mom_hybgen_remap	This module contains the hybgen remapping routines from HYCOM, with minor modifications to follow the MOM6 coding conventions.
mom_hybgen_unmix	This module contains the hybgen unmixing routines from HYCOM, with modifications to follow the MOM6 coding conventions and several bugs fixed.
mom_ice_shelf	Implements the thermodynamic aspects of ocean / ice-shelf interactions, along with a crude placeholder for a later implementation of full ice shelf dynamics, all using the MOM framework and coding style.
mom_ice_shelf_dynamics	Implements a crude placeholder for a later implementation of full ice shelf dynamics.
mom_ice_shelf_initialize	Initialize ice shelf variables.
mom_ice_shelf_state	Implements the thermodynamic aspects of ocean / ice-shelf interactions, along with a crude placeholder for a later implementation of full ice shelf dynamics, all using the MOM framework and coding style.
mom_int_tide_input	Calculates energy input to the internal tides.
mom_interface_filter	Interface height filtering module.
mom_interface_heights	Functions for calculating interface heights, including free surface height.
mom_internal_tides	Subroutines that use the ray-tracing equations to propagate the internal tide energy density.
mom_interpolate	This module provides added functionality to the FMS temporal and spatial interpolation routines.
mom_intrinsic_functions	A module with intrinsic functions that are used by MOM but are not supported by some compilers.
mom_io	This module contains I/O framework code.
MOM_IO_file	This file defines the MOM_file classes used to inferface with the internal IO handlers, such as the configured "infra" layer (FMS) or native netCDF.
mom_io_file	This module contains the MOM file handler types.
mom_is_diag_mediator	The subroutines here provide convenient wrappers to the FMS diag_manager interfaces with additional diagnostic capabilities.
mom_isopycnal_slopes	Calculations of isoneutral slopes and stratification.
mom_kappa_shear	Shear-dependent mixing following Jackson et al.
mom_lateral_mixing_coeffs	Variable mixing coefficients.
mom_load_love_numbers	Load Love Numbers for degree range [0, 1440].
mom_marine_ice	Routines incorporating the effects of marine ice (sea-ice and icebergs) into the ocean model dynamics and thermodynamics.
mom_meke	Implements the Mesoscale Eddy Kinetic Energy framework with topographic beta effect included in computing beta in Rhines scale.
mom_meke_types	<undocumented>
mom_mixed_layer_restrat	Parameterization of mixed layer restratification by unresolved mixed-layer eddies.
mom_murmur_hash	MurmurHash is a non-cryptographic hash function developed by Austin Appleby.
mom_netcdf	MOM6 interface to netCDF operations.
mom_neutral_diffusion	A column-wise toolbox for implementing neutral diffusion.
mom_obsolete_diagnostics	Provides a mechanism for recording diagnostic variables that are no longer valid, along with their replacement name if appropriate.
mom_obsolete_params	Methods for testing for, and list of, obsolete run-time parameters.
mom_ocmip2_cfc	Simulates CFCs using the OCMIP2 protocols.
mom_oda_driver_mod	Interfaces for MOM6 ensembles and data assimilation.
MOM_oda_driver_mod	<undocumented>
mom_oda_incupd	This module contains the routines used to apply incremental updates from data assimilation.
mom_offline_aux	Contains routines related to offline transport of tracers.
mom_offline_main	The routines here implement the offline tracer algorithm used in MOM6.
mom_opacity	Routines used to calculate the opacity of the ocean.
mom_open_boundary	Controls where open boundary conditions are applied.
mom_particles_mod	A set of dummy interfaces for compiling the MOM6 drifters code.
mom_pointaccel	Debug accelerations at a given point.
mom_porous_barriers	Module for calculating curve fit for porous topography.
mom_pressureforce	A thin wrapper for Boussinesq/non-Boussinesq forms of the pressure force calculation.
mom_pressureforce_fv	Finite volume pressure gradient (integrated by quadrature or analytically)
mom_pressureforce_mont	Provides the Montgomery potential form of pressure gradient.
mom_random	Provides gridded random number capability.
mom_regridding	Generates vertical grids as part of the ALE algorithm.
mom_regularize_layers	Provides regularization of layers in isopycnal mode.
mom_remapping	Provides column-wise vertical remapping functions.
mom_restart	The MOM6 facility for reading and writing restart files, and querying what has been read.
mom_safe_alloc	Convenience functions for safely allocating memory without accidentally reallocating pointer and causing memory leaks.
mom_self_attr_load	<undocumented>
mom_set_diffusivity	Calculate vertical diffusivity from all mixing processes.
mom_set_visc	Calculates various values related to the bottom boundary layer, such as the viscosity and thickness of the BBL (set_viscous_BBL).
mom_shared_initialization	Code that initializes fixed aspects of the model grid, such as horizontal grid metrics, topography and Coriolis, and can be shared between components.
mom_spatial_means	Functions and routines to take area, volume, mass-weighted, layerwise, zonal or meridional means.
mom_spherical_harmonics	Laplace's spherical harmonic transforms (SHT)
mom_sponge	Implements sponge regions in isopycnal mode.
mom_state_initialization	Initialization functions for state variables, u, v, h, T and S.
mom_stoch_eos	Provides the ocean stochastic equation of state.
mom_stochastics	Top-level module for the MOM6 ocean model in coupled mode.
mom_streaming_filter	Streaming band-pass filter for detecting the instantaneous tidal signals in the simulation.
mom_string_functions	Handy functions for manipulating strings.
mom_sum_output	Reports integrated quantities for monitoring the model state.
mom_surface_forcing	Functions that calculate the surface wind stresses and fluxes of buoyancy or temperature/salinity and fresh water, in ocean-only (solo) mode.
mom_surface_forcing_gfdl	<undocumented>
MOM_temperature_conv	<undocumented>
mom_temperature_convert	Functions to convert between conservative and potential temperature.
mom_tfreeze	Freezing point expressions.
mom_thickness_diffuse	Isopycnal height diffusion (or Gent McWilliams diffusion)
mom_tidal_forcing	Tidal contributions to geopotential.
mom_tidal_mixing	Interface to vertical tidal mixing schemes including CVMix tidal mixing.
mom_tracer_advect	This module contains the subroutines that advect tracers along coordinate surfaces.
mom_tracer_advect_schemes	This module contains constants for the tracer advection schemes.
mom_tracer_diabatic	This module contains routines that implement physical fluxes of tracers (e.g.
MOM_tracer_flow_control	By Will Cooke, April 2003 Edited by Elizabeth Yankovsky, May 2019.
mom_tracer_flow_control	Orchestrates the registration and calling of tracer packages.
mom_tracer_hor_diff	Main routine for lateral (along surface or neutral) diffusion of tracers.
mom_tracer_initialization_from_z	Initializes hydrography from z-coordinate climatology files.
mom_tracer_registry	This module contains subroutines that handle registration of tracers and related subroutines.
mom_tracer_types	This module contains the tracer_type() and and tracer_registry_type().
mom_tracer_z_init	Used to initialize tracers from a depth- (or z*-) space file.
mom_transcribe_grid	Module with routines for copying information from a shared dynamic horizontal grid to an ocean-specific horizontal grid and the reverse.
mom_unique_scales	This module provides tools that can be used to check the uniqueness of the dimensional scaling factors used by the MOM6 ocean model or other models.
mom_unit_scaling	Provides a transparent unit rescaling type to facilitate dimensional consistency testing.
mom_unit_testing	<undocumented>
mom_unit_tests	Invokes unit tests in all modules that have them.
mom_variables	Provides transparent structures with groups of MOM6 variables and supporting routines.
mom_vert_friction	Implements vertical viscosity (vertvisc)
mom_verticalgrid	Provides a transparent vertical ocean grid type and supporting routines.
mom_wave_drag	Frequency-dependent linear wave drag.
mom_wave_interface	Interface for surface waves.
mom_wave_speed	Routines for calculating baroclinic wave speeds.
mom_write_cputime	A module to monitor the overall CPU time used by MOM6 and project when to stop the model.
mom_zanna_bolton	Calculates Zanna and Bolton 2020 parameterization Implemented by Perezhogin P.A.
neverworld_initialization	Initialization for the "Neverworld" configuration.
numerical_testing_type	A simple type for keeping track of numerical tests.
nw2_tracers	Ideal tracers designed to help diagnose a tracer diffusivity tensor in NeverWorld2.
ocean_da_core_mod	A set of dummy interfaces for compiling the MOM6 DA driver code.
ocean_da_types_mod	Dummy aata structures and methods for ocean data assimilation.
ocean_model_mod	Top-level module for the MOM6 ocean model in coupled mode.
oil_tracer	A tracer package to mimic dissolved oil.
p1m_functions	Linear interpolation functions.
p3m_functions	Cubic interpolation functions.
particles_types_mod	Dummy data structures and methods for drifters package.
PCM_functions	Date of creation: 2008.06.06 L.
pcm_functions	Piecewise constant reconstruction functions.
phillips_initialization	Initialization for the "Phillips" channel configuration.
plm_functions	Piecewise linear reconstruction functions.
polynomial_functions	Polynomial functions.
posix	Interface to the libc POSIX API.
ppm_functions	Provides functions used with the Piecewise-Parabolic-Method in the vertical ALE algorithm.
pqm_functions	Piecewise quartic reconstruction functions.
pseudo_salt_tracer	A tracer package that mimics salinity.
recon1d_emplm_cwk	Piecewise Linear Method 1D reconstruction in index space and boundary extrapolation.
recon1d_emplm_wa	Extrapolated-Monotonized Piecewise Linear Method 1D reconstruction.
recon1d_emplm_wa_poly	Extrapolated-Monotonized Piecewise Linear Method 1D reconstruction.
recon1d_eppm_cwk	Piecewise Parabolic Method 1D reconstruction in model index space with linear extrapolation for first and last cells.
recon1d_mplm_cwk	Piecewise Linear Method 1D reconstruction in index space.
recon1d_mplm_wa	Monotonized Piecewise Linear Method 1D reconstruction.
recon1d_mplm_wa_poly	Monotonized Piecewise Linear Method 1D reconstruction using polynomial representation.
recon1d_pcm	1D reconstructions using the Piecewise Constant Method (PCM)
recon1d_plm_cw	Piecewise Linear Method 1D reconstruction.
recon1d_plm_cwk	Piecewise Linear Method 1D reconstruction.
recon1d_plm_hybgen	Piecewise Linear Method 1D reconstruction ported from "hybgen" module in Hycom.
recon1d_plm_wls	Piecewise Linear Method using Weighted Conservative Least Squares 1D reconstruction.
recon1d_ppm_c4_2019	<undocumented>
recon1d_ppm_cw	Piecewise Parabolic Method 1D reconstruction following Colella and Woodward, 1984.
recon1d_ppm_cwk	Piecewise Parabolic Method 1D reconstruction in model index space.
recon1d_ppm_h4_2018	Piecewise Parabolic Method 1D reconstruction with h4 interpolation for edges (2018 version)
recon1d_ppm_h4_2019	Piecewise Parabolic Method 1D reconstruction with h4 interpolation for edges.
recon1d_ppm_hybgen	Piecewise Parabolic Method 1D reconstruction following Colella and Woodward, 1984.
recon1d_type	A generic type for vertical 1D reconstructions.
regional_dyes	A tracer package for using dyes to diagnose regional flows.
regrid_consts	Contains constants for interpreting input parameters that control regridding.
regrid_edge_values	Edge value estimation for high-order reconstruction.
regrid_interp	Vertical interpolation for regridding.
regrid_solvers	Solvers of linear systems.
rgc_initialization	Configures the models sponges for the Rotating Gravity Current (RGC) experiment.
rgc_tracer	This module contains the routines used to set up a dynamically passive tracer.
rossby_front_2d_initialization	Initial conditions for the 2D Rossby front test.
scm_cvmix_tests	Initial conditions and forcing for the single column model (SCM) CVMix test set.
seamount_initialization	Configures the model for the idealized seamount test case.
self_attr_load	<undocumented>
shelfwave_initialization	Configures the model for the idealized shelfwave test case.
sloshing_initialization	Initialization for the "sloshing" internal waves configuration.
soliton_initialization	Initial conditions for the Equatorial Rossby soliton test (Boyd).
stochastic_physics	<undocumented>
supercritical_initialization	The "super critical" configuration.
tidal_bay_initialization	Configures the model for the "tidal_bay" experiment.
tidal_forcing	<undocumented>
user_change_diffusivity	Increments the diapycnal diffusivity in a specified band of latitudes and densities.
user_initialization	A template of a user to code up customized initial conditions.
user_revise_forcing	Provides a template for users to code updating the forcing fluxes.
user_shelf_init	This module specifies the initial values and evolving properties of the MOM6 ice shelf, using user-provided code.
user_surface_forcing	Template for user to code up surface forcing.
user_tracer_example	A sample tracer package that has striped initial conditions.
write_ocean_obs_mod	Dummy interfaces for writing ODA data.