CESM3.0a Driver Namelist Definitions

Auxiliary name identifier in history name

If true, use time average for aux file output.

Auxiliary mediator atm2med instantaneous history output every hour.

Auxiliary mediator atm2med instantaneous history output every hour.

history option span

history option type

Number of time samples per file.

Auxiliary name identifier in history name

If true, use time average for aux file output.

Auxiliary atm2med history output averaged over 1 hour.

Auxiliary atm2med history output averaged over 1 hour.

history option span

history option type

Number of time samples per file.

Auxiliary name identifier in history name.

If true, use time average for aux file output.

      Auxiliary mediator atm2med precipitation history output every 3 hours
    

Auxiliary mediator atm2med precipitation fields history output every 3 hours

history option span

history option type

Number of time samples per file.

Auxiliary name identifier in history name.

If true, use time average for aux file output.

      Auxiliary mediator a2x dynamic, radiation, and precipitation history output every 3 hours
    

      Auxiliary mediator a2x dynamic, radiation, and precipitation fields history output every 3 hours
    

history option span

history option type

Number of time samples per file.

Auxiliary name identifier in history name

If true, use time average for aux file output.

Auxiliary mediator a2x aerosol and ghg history output daily or endofrun

Auxiliary mediator a2x aerosol and ghg history output daily or endofrun

history option span

history option type

Number of time samples per file.

Auxiliary mediator lnd2med fields every year

Auxiliary name identifier in history name

If true, use time average for aux file output.

Auxiliary mediator l2x fields every lnd coupling interval

Auxiliary mediator lnd2med output every lnd coupling interval

history option type

history option type

Number of time samples per file.

Auxiliary name identifier in history name

If true, use time average for aux file output.

Auxiliary mediator ocn2med average history output every day.

Auxiliary mediator ocn2med average history output every day.

history option type

history option type

Number of time samples per file.

Auxiliary name identifier in history name

If true, use time average for aux file output.

Auxiliary mediator rof2med precipitation history output every 3 hours

Auxiliary mediator rof2med precipitation fields history output.

history option span

history option type

Number of time samples per file.

Auxiliary mediator wav2med file1 time averaged flag for file output.
    If this flag is set to .false. only instantaneous output will be created in the auxiliary file.

Auxiliary mediator wav2med average history output every day.
    Note that ww3dev will use this configuration variable and send
    the fields needed for wav2med auxiliary file

Auxiliary mediator wav2med file1 colon delimited output
    fields. NOTE: these are assumed to be time averaged over a day in
    the WW3 cap - so the settings of histaux_wav2med_file1_history_n
    and histaux_wav2med_file1_history_option should be 1 and ndays,
    respectively.

Auxiliary mediator wav2med file1 output frequency (used for option type)

Auxiliary mediator wav2med file1 output option

Number of time samples per file.

      sets the diagnotics level of the annual budgets. [0,1,2,3],
      written only if do_budgets variable is .true.,
      0=none,
      1=+net summary budgets,
      2=+detailed lnd/ocn/ice component budgets,
      3=+detailed atm budgets
      default: 1
    

      sets the diagnotics level of the daily budgets. [0,1,2,3],
      written only if do_budgets variable is .true.,
      0=none,
      1=+net summary budgets,
      2=+detailed lnd/ocn/ice component budgets,
      3=+detailed atm budgets
      default: 0
    

      sets the diagnotics level of the instantaneous budgets. [0,1,2,3],
      written only if BUDGETS variable is true
      0=none,
      1=+net summary budgets,
      2=+detailed lnd/ocn/ice component budgets,
      3=+detailed atm budgets
      default: 0
    

      sets the diagnotics level of the longterm budgets written at the end
      of the year. [0,1,2,3],
      written only if do_budgets variable is .true.,
      0=none,
      1=+net summary budgets,
      2=+detailed lnd/ocn/ice component budgets,
      3=+detailed atm budgets,
      default: 1
    

      sets the diagnotics level of the longterm budgets written at the end
      of each run. [0,1,2,3],
      written only if do_budgets variable is .true.,
      0=none,
      1=+net summary budgets,
      2=+detailed lnd/ocn/ice component budgets,
      3=+detailed atm budgets,
      default: 0
    

      currently v0 refers to budgets using POP and v1 refers to budgets using MOM6
    

      logical that turns on diagnostic budgets, false means budgets will never be written
    

      the number of mpi tasks assigned to the atm components.
      set by NTASKS_ATM in env_configure.xml.
    

      the number of threads per mpi task for the atm component.
      set by NTHRDS_ATM in env_configure.xml.
    

      the mpi global processors stride associated with the mpi tasks for the atm component.
      set by PSTRID_ATM in env_configure.xml.
    

      the global mpi task rank of the root processor assigned to the atm component.
      set by ROOTPE_ATM in env_configure.xml.
    

      the number of mpi tasks assigned to the cpl components.
      set by NTASKS_CPL in env_configure.xml.
    

      the number of threads per mpi task for the cpl component.
      set by NTHRDS_CPL in env_configure.xml.
    

      the mpi global processors stride associated with the mpi tasks for the cpl component.
      set by PSTRID_CPL in env_configure.xml.
    

      the global mpi task rank of the root processor assigned to the cpl component.
      set by ROOTPE_CPL in env_configure.xml.
    

      the number of mpi tasks assigned to the esp components.
      set by NTASKS_ESP in env_configure.xml.
    

      the number of threads per mpi task for the esp component.
      set by NTHRDS_ESP in env_configure.xml.
    

      the mpi global processors stride associated with the mpi tasks for the esp component.
      set by PSTRID_ESP in env_configure.xml.
    

      the global mpi task rank of the root processor assigned to the esp component.
      set by ROOTPE_ESP in env_configure.xml.
    

      the number of mpi tasks assigned to the glc components.
      set by NTASKS_GLC in env_configure.xml.
    

      the number of threads per mpi task for the glc component.
      set by NTHRDS_GLC in env_configure.xml.
    

      the mpi global processors stride associated with the mpi tasks for the glc component.
      set by PSTRID_GLC in env_configure.xml.
    

      the global mpi task rank of the root processor assigned to the glc component.
      set by ROOTPE_GLC in env_configure.xml.
    

      the number of mpi tasks assigned to the ice components.
      set by NTASKS_ICE in env_configure.xml.
    

      the number of threads per mpi task for the ice component.
      set by NTHRDS_ICE in env_configure.xml.
    

      the mpi global processors stride associated with the mpi tasks for the ice component.
      set by PSTRID_ICE in env_configure.xml.
    

      the global mpi task rank of the root processor assigned to the ice component.
      set by ROOTPE_ICE in env_configure.xml.
    

      the number of mpi tasks assigned to the lnd components.
      set by NTASKS_LND in env_configure.xml.
    

      the number of threads per mpi task for the lnd component.
      set by NTHRDS_LND in env_configure.xml.
    

      the mpi global processors stride associated with the mpi tasks for the lnd component.
      set by PSTRID_LND in env_configure.xml.
    

      the global mpi task rank of the root processor assigned to the lnd component.
      set by ROOTPE_LND in env_configure.xml.
    

      The number of model instances in the executable
    

      the number of mpi tasks assigned to the ocn components.
      set by NTASKS_OCN in env_configure.xml.
    

      the number of threads per mpi task for the ocn component.
      set by NTHRDS_OCN in env_configure.xml.
    

      the mpi global processors stride associated with the mpi tasks for the ocn component.
      set by PSTRID_OCN in env_configure.xml.  default: 1
    

      the global mpi task rank of the root processor assigned to the ocn component.
      set by ROOTPE_OCN in env_configure.xml.
    

      the number of mpi tasks assigned to the lnd components.
      set by NTASKS_LND in env_configure.xml.
    

      the number of threads per mpi task for the lnd component.
      set by NTHRDS_ROF in env_configure.xml.
    

      the mpi global processors stride associated with the mpi tasks for the lnd component.
      set by PSTRID_LND in env_configure.xml.
    

      the global mpi task rank of the root processor assigned to the lnd component.
      set by ROOTPE_LND in env_configure.xml.
    

      the number of mpi tasks assigned to the wav components.
      set by NTASKS_WAV in env_configure.xml.
    

      the number of threads per mpi task for the wav component.
      set by NTHRDS_WAV in env_configure.xml.
    

      the mpi global processors stride associated with the mpi tasks for the wav component.
      set by PSTRID_WAV in env_configure.xml.
    

      the global mpi task rank of the root processor assigned to the wav component.
      set by ROOTPE_WAV in env_configure.xml.
    

      Add a wind gustiness factor. This should be false for
      ocn_surface_flux_scheme settings of 1 or 2.
    

      If true, use shr_wv_sat_mod to calculate qsat for atm-ocn flux calculations.

      If false, use the older inline calculation of qsat, which uses a different
      formulation.

      (Currently only relevant for ocn_surface_flux_scheme = 0 or 1.)
    

      number of atm cells in i direction
    

      number of atm cells in j direction
    

      if true use  Mahrt and Sun 1995,MWR modification to surface flux calculation
    

      Type of coupling mode to use in the mediator
    

      Only used for C,G compsets: if true, compute albedos to work with daily avg SW down
    

      Iterate atmocn flux calculation to this % difference
      Setting this to zero will always do flux_max_iteration
    

      Iterate atmocn flux calculation a max of this value
    

      Whether to renormalize the surface mass balance (smb) sent from lnd to glc so that the
      global integral on the glc grid agrees with the global integral on the lnd grid.

      Unlike most fluxes, smb is remapped with bilinear rather than conservative mapping
      weights, so this option is needed for conservation. However, this can be turned off
      in non-fully-coupled configurations where conservation isn't important (e.g.,
      glc-only configurations - T compsets) to avoid the global correction that comes with
      this renormalization.

      Allowable values are:
      'on': do this renormalization
      'off': do not do this renormalization; note that this will break conservation so
         typically should not be used in fully-coupled cases

      Only used if running with a GLC component.
    

      number of ice cells in i direction
    

      number of ice cells in j direction
    

      number of lnd cells in i direction
    

      number of lnd cells in j direction
    

      number of ocn cells in i direction
    

      number of ocn cells in j direction
    

      atm/ocn flux calculation scheme

      0: Large and Pond
      1: COARE algorithm
      2: UA algorithm
    

      If true, remove negative runoff generated from the glc (ice sheet) component by downweighting all positive runoff globally.
    

      If true, remove negative runoff generated from the land component by downweighting all positive runoff globally.
    

      number of rof cells in i direction
    

      number of rof cells in j direction
    

Freezing point calculation for salt water.

      number of wav cells in i direction
    

      number of wav cells in j direction
    

      Whether Data Assimilation is on for component atm
    

      Whether Data Assimilation is on for component CPL
    

      Whether Data Assimilation is on for component glc
    

      Whether Data Assimilation is on for component ice
    

      Whether Data Assimilation is on for component lnd
    

      Whether Data Assimilation is on for component ocn
    

      Whether Data Assimilation is on for component rof
    

      Whether Data Assimilation is on for component wav
    

      List of files to merge together that contains drv_flds_in namelists
      The paths are relative to the case directory. drv_flds_in include the namelists that
      the driver reads and gives information on additional fields to be passed to different
      components that need to look at the same data.
    

      true => turn on aquaplanet mode in cam
    

      Allow same branch casename as reference casename. If $CASE and $REFCASE are the same and the start_type is
      not startup, then the value of brnch_retain_casename is set to .true.
    

      sets the diagnotics level of the monthy budgets. [0,1,2,3],
      written only if do_budgets variable is .true.,
      0=none,
      1=+net summary budgets,
      2=+detailed lnd/ocn/ice component budgets,
      3=+detailed atm budgets
      default: 1
    

      case description.
    

      case name.
    

cime model

      Level of debug output; higher values give progressively more output

      Some example values (other values are also accepted)
      - 0: no extra debug output
      - 1: a bit of debug output
      - 2: a bit more debug output
      - 6: a moderate amount of debug output
      - 11: a lot of debug output
      - 21: a huge amount of debug output

      Note that setting this to moderate - high values can lead to overwhelming amounts of output.

      (Default: 0)
    

      Driver restart pointer file to initialize time info
    

      hostname information,
    

      Ending suffix "postfix" for output log files.
    

      only have the mediator reads the restart file regardless of start type
    

      model doi url
    

      Model version
    

      Root for output log files.
    

      Perpetual flag
    

      Perpetual date
    

      total number of scalars in the scalar coupling field
    

      index of scalar containing global grid cell count in X dimension
    

      index of scalar containing global grid cell count in Y dimension
    

      index of scalar containing calendar day of nextsw computation from atm
    

      index of scalar containing epbal precipitation factor from ocn (only for POP)
    

      name of the coupling field with scalar information
    

      mode to start the run up, [startup,branch,continue],
      automatically derived from RUN_TYPE in env_run.xml
    

      location of timing checkpoint output.
    

      location of timing output.
    

      username documentation
    

      If true, wav-ice coupling is active
    

      False => CISM does not evolve but only sends initial information back to CTSM
    

      Pass Bromoform from OCN to ATM component
    

      Pass CO2 from ATM to surface components
      Set this by setting the xml variable BGC_MODE.
      If BGC_MODE is set to 'CO2A', then flds_co2a will be set to .true.
    

      Pass CO2 from ATM to LND and back from LND to ATM
      Set this by setting the xml variable BGC_MODE.
      If BGC_MODE is set to 'CO2B', then flds_co2b will be set to .true.
    

      Pass CO2 from ATM to surface (OCN/LND) and back from them to ATM
      Set this by setting the xml variable BGC_MODE.
      If BGC_MODE is set to 'CO2C', then flds_co2c will be set to .true.
    

      Pass DMS from OCN to ATM component
    

      .true. if select per ice thickness category fields are passed to the ocean.
      Set by the xml variable CPL_I2O_PER_CAT in env_run.xml
    

      Pass N2O from OCN to ATM component
    

      Pass NH3 from OCN to ATM component
    

      Pass channel depths from river component to land component. This is needed for the hillslope
      model in CTSM.
    

      Number of cism elevation classes. Set by the xml variable GLC_NEC in env_run.xml
    

      Number of sea ice thickness categories. Set by the xml variable ICE_NCAT in env_build.xml
    

      .true. if ocean sends fields at multiple ocean levels to the land-ice component
    

      Grid for atm ocn flux calc
      default: xgrid for fully coupled cases, ogrid for datm
    

atm to ocn mapping, 'unset' or 'idmap' are normal possible values

atm to lnd mapping, 'unset' or 'idmap' are normal possible values

atm to ocn mapping, 'unset' or 'idmap' are normal possible values

atm to wav mapping, 'unset' or 'idmap' are normal possible values

ice to atm mapping, 'unset' or 'idmap' are normal possible values

lnd to atm mapping, 'unset' or 'idmap' are normal possible values

lnd to rof mapping, 'unset' or 'idmap' are normal possible values (mapping file given for mizuRoute grids)

used for atm->ocn and atm-ice mapping of u and v; rotate u,v
    to 3d cartesian space, map from src->dest, then rotate back

      MESH description of atm grid
    

      MESH description of glc grid
    

      MESH description of ice grid
    

      MESH description of lnd grid
    

      MESH for model mask (used to create masks and fractions at run time if different than model mesh)
    

      MESH description of ocn grid
    

      MESH description of rof grid
    

      MESH description of wav grid
    

ocn to atm mapping, 'unset' or 'idmap' are normal possible values

      ocn to wav state mapping file for states
    

rof to lnd mapping, 'unset' or 'idmap' are normal possible values (mapping file given for mizuRoute grids)

      runoff to ocn nearest neighbor plus smoothing conservative mapping file
    

      runoff to ocn nearest neighbor plus smoothing conservative mapping file
    

      wav to ocn state mapping file for states
    

directory for output log files

name of component output log file

      Model components that are active
    

if true, mediator is present in run 

      eccentricity of orbit, used when orb_mode is fixed_parameters.
      default: SHR_ORB_UNDEF_REAL (1.e36) (Not currently used in build-namelist)
    

      year of orbit, used when orb_mode is fixed_year or variable_year. (default: 1990)
    

      model year associated with orb_iyear when orb_mode is variable_year. (default: 1990)
    

      orbital model setting.  this sets how the orbital mode will be
      configured.
      "fixed_year" uses the orb_iyear and other orb inputs are ignored.  In
      this mode, the orbital parameters are constant and based on the year.
      "variable_year" uses the orb_iyear and orb_iyear_align.  In this mode,
      the orbital parameters vary as the model year advances and the model
      year orb_iyear_align has the equivalent orbital year of orb_iyear.
      "fixed_parameters" uses the orb_eccen, orb_mvelp, and orb_obliq to set
      the orbital parameters which then remain constant through the model
      integration. [fixed_year, variable_year, fixed_parameters]  (default: 'fixed_year'.)
    

      location of vernal equinox in longitude degrees, used when orb_mode is fixed_parameters.
      default: SHR_ORB_UNDEF_REAL (1.e36)(Not currently used in build-namelist)
    

      obliquity of orbit in degrees, used when orb_mode is fixed_parameters.
      default: SHR_ORB_UNDEF_REAL (1.e36) (Not currently used in build-namelist)
    

      Check for NaN values in fields returned from mediator to components.  This has a small performance impact.
    

      See gptl_papi.c for the list of valid values
    

      See gptl_papi.c for the list of valid values
    

      See gptl_papi.c for the list of valid values
    

      See gptl_papi.c for the list of valid values
    

      default: .false.
    

      default: 1
    

      default: .false.
    

      default: .false.
    

      future asynchronous IO capability (not currently supported).
      If pio_async_interface is .true. or {component}_PIO_* variable is not set or set to -99
      the component variable will be set using the pio_* value.
      default: .false.
    

      IO tasks FOR ASYNC IO, only valid if ASYNCIO is true.
    

      IO rootpe task FOR ASYNC IO, only valid if ASYNCIO is true.
    

      IO task stride FOR ASYNC IO, only valid if ASYNCIO is true.
    

      blocksize for pio box rearranger
    

      pio buffer size limit
    

      pio debug level
      valid values: 0,1,2,3,4,5,6
    

      format of netcdf files created by pio, ignored if
      PIO_TYPENAME is netcdf4p or netcdf4c.  64bit_data only
      supported in netcdf 4.4.0 or newer
    

      number of io tasks in pio used generically, component based value takes precedent.
    

      pio rearranger communication option: Enable handshake (comp2io)
    

      pio rearranger communication option: Enable handshake (io2comp)
    

      pio rearranger communication option: Enable isends (comp2io)
    

      pio rearranger communication option: Enable isends (io2comp)
      default: .false.
    

      pio rearranger communication flow control direction.
    

      pio rearranger communication max pending req (comp2io)
    

      pio rearranger communication max pending req (io2comp)
    

      pio rearranger communication type.
      valid values: p2p, coll, default
    

      Rearranger method for pio 1=box, 2=subset.
    

      io task root in pio used generically, component based value takes precedent.
    

      stride of tasks in pio used generically, component based value takes precedent.
    

      io type in pio used generically, component based value takes precedent.
      valid values: netcdf, pnetcdf, netcdf4p, netcdf4c, default
    

      Tolerance for relative error
      default: -1.0e-8
    

      Recompute with non-scalable algorithm if reprosum_diffmax is exceeded.
      default: .false.
    

      Use faster method for reprosum, but one where reproducibility is not always guaranteed.
      default: .false.
    

      If set to .true. BGC fields will be passed back and forth between the ocean and seaice
      via the mediator.
    

      Latitude in degrees corresponding to the grid location
      in single column and single point modes.
    

      Longitude in degrees corresponding to the grid location
      in single column and single point modes.
    

      DOMAIN file needed for single column model IF and only if
      a nearest neighbor search is done to match the PTS_LAT and PTS_LON
      to the closest point in the domain file. This file is ONLY used in
      single column mode.
    

      atm coupling interval in seconds
      set via ATM_NCPL in env_run.xml.
      ATM_NCPL is the number of times the atm is coupled per NCPL_BASE_PERIOD
      NCPL_BASE_PERIOD is also set in env_run.xml and is the base period
      associated with NCPL coupling frequency, and has valid values: hour,day,year,decade
    

      calendar in use.  [NO_LEAP, GREOGORIAN].
      set by CALENDAR in env_build.xml
    

      esp run interval in seconds
      esp_cpl_dt is the number of times the esp is run per NCPL_BASE_PERIOD
      NCPL_BASE_PERIOD is set in env_run.xml and is the base period
      associated with NCPL coupling frequency, nad has valid values: hour,day,year,decade
      default value set by buildnml to be the pause interval if pause is active
      otherwise, it is set to the shortest component coupling time
    

      Period at which coupler averages fields sent to GLC.
      This supports doing the averaging to GLC less frequently than GLC is called
      (i.e., separating the averaging frequency from the calling frequency).
      This is useful because there are benefits to only averaging the GLC inputs
      as frequently as they are really needed (yearly for CISM), but GLC needs to
      still be called more frequently than that in order to support mid-year restarts.

      Setting glc_avg_period to 'glc_coupling_period' means that the averaging is
      done exactly when the GLC is called (governed by GLC_NCPL).
    

      glc coupling interval in seconds
      set via GLC_NCPL in env_run.xml.
      GLC_NCPL is the number of times the glc is coupled per NCPL_BASE_PERIOD
      NCPL_BASE_PERIOD is also set in env_run.xml and is the base period
      associated with NCPL coupling frequency, nad has valid values: hour,day,year,decade
    

      sets mediator snapshot history file frequency (like restart_n)
      set by HIST_N in env_run.xml.
    

      Sets mediator time-average history file frequency (like restart_option)
    

      sets mediator snapshot history file frequency for atm import/export fields (like restart_n)
    

      Sets mediator time-average history file frequency (like restart_option)
    

      sets mediator snapshot history file frequency for glc import/export fields (like restart_n)
    

      Sets mediator time-average history file frequency (like restart_option)
    

      sets mediator snapshot history file frequency for ice import/export fields (like restart_n)
    

      Sets mediator time-average history file frequency (like restart_option)
    

      sets mediator snapshot history file frequency for lnd import/export fields (like restart_n)
    

      sets mediator aoflux and ocean albedoes snapshot history file frequency for atm import/export fields (like restart_n)
    

      Sets mediator time-average history file frequency (like restart_option)
    

      sets mediator snapshot history file frequency for ocn import/export fields (like restart_n)
    

      Sets mediator time-average history file frequency (like restart_option)
    

      sets mediator snapshot history file frequency for rof import/export fields (like restart_n)
    

      Sets mediator time-average history file frequency (like restart_option)
    

      sets mediator snapshot history file frequency for wav import/export fields (like restart_n)
    

      mediator history snapshot option (used with history_n and history_ymd)
      set by HIST_OPTION in env_run.xml.
      history_option alarms are:
      [none/never], turns option off
      [nseconds] , history snapshot every history_n nseconds, relative to current run start time
      [nminutes] , history snapshot every history_n nminutes, relative to current run start time
      [nhours]   , history snapshot every history_n nhours  , relative to current run start time
      [ndays]    , history snapshot every history_n ndays   , relative to current run start time
      [monthly]  , history snapshot every           month   , relative to current run start time
      [nmonths]  , history snapshot every history_n nmonths , relative to current run start time
      [nyears]   , history snapshot every history_n nyears  , relative to current run start time
      [date]     , history snapshot at history_ymd value
      [end]      , history snapshot at end
    

      mediator time average history option (used with histavg_n and histavg_ymd)
    

      mediator history for atm import/export/fields snapshot option (used with history_n and history_ymd)
    

      mediator time average history option (used with histavg_n and histavg_ymd)
    

      mediator history for glc import/export/fields snapshot option (used with history_n and history_ymd)
    

      mediator time average history option (used with histavg_n and histavg_ymd)
    

      mediator history for ice import/export/fields snapshot option (used with history_n and history_ymd)
    

      mediator time average history option (used with histavg_n and histavg_ymd)
    

      mediator history for lnd import/export/fields snapshot option (used with history_n and history_ymd)
    

      mediator history for mediator aoflux and oceean albedoes (used with history_n and history_ymd)
    

      mediator time average history option (used with histavg_n and histavg_ymd)
    

      mediator history for ocn import/export/fields snapshot option (used with history_n and history_ymd)
    

      mediator time average history option (used with histavg_n and histavg_ymd)
    

      mediator history for rof import/export/fields snapshot option (used with history_n and history_ymd)
    

      mediator time average history option (used with histavg_n and histavg_ymd)
    

      mediator history for wav import/export/fields snapshot option (used with history_n and history_ymd)
    

      date associated with history_option date.  yyyymmdd format.
      set by HIST_DATE in env_run.xml.
    

      ice coupling interval in seconds
      set via ICE_NCPL in env_run.xml.
      ICE_NCPL is the number of times the ice is coupled per NCPL_BASE_PERIOD
      NCPL_BASE_PERIOD is also set in env_run.xml and is the base period
      associated with NCPL coupling frequency, nad has valid values: hour,day,year,decade
    

      lnd coupling interval in seconds
      set via LND_NCPL in env_run.xml.
      LND_NCPL is the number of times the lnd is coupled per NCPL_BASE_PERIOD
      NCPL_BASE_PERIOD is also set in env_run.xml and is the base period
      associated with NCPL coupling frequency, nad has valid values: hour,day,year,decade
    

      ocn coupling interval in seconds
      set via OCN_NCPL in env_run.xml.
      OCN_NCPL is the number of times the ocn is coupled per NCPL_BASE_PERIOD
      NCPL_BASE_PERIOD is also set in env_run.xml and is the base period
      associated with NCPL coupling frequency, nad has valid values: hour,day,year,decade
    

      Sets model restart writes with restart_option and restart_ymd (same options as stop_n)
    

      sets the restart frequency with restart_n and restart_ymd
      restart_option alarms are:
      [none/never], turns option off
      [nseconds] , restarts every restart_n nseconds, relative to current run start time
      [nminutes] , restarts every restart_n nminutes, relative to current run start time
      [nhours]   , restarts every restart_n nhours  , relative to current run start time
      [ndays]    , restarts every restart_n ndays   , relative to current run start time
      [nmonths]  , restarts every restart_n nmonths , relative to current run start time
      [nyears]   , restarts every restart_n nyears  , relative to current run start time
      [monthly]  , restarts every           month   , relative to current run start time
      [yearly]   , restarts every           year    , relative to current run start time
      [date]     , restarts at restart_ymd value
      [end]      , restarts at end
    

      Date in yyyymmdd format, sets model restart write date with rest_option and restart_n
      default: STOP_N
    

      river runoff coupling interval in seconds
      currently set by default to 10800 seconds.
      default: 10800
    

      Start time-of-day in universal time (seconds), should be between zero and 86400
      default: 0
    

      Run start date in yyyymmdd format, only used for startup and hybrid runs.
      default: 00010101
    

      Sets the run length with stop_option and stop_ymd
    

      sets the run length with stop_n and stop_ymd
      stop_option alarms are:
      [none/never] , turns option off
      [nseconds]   , stops every stop_n nseconds, relative to current run start time
      [nminutes]   , stops every stop_n nminutes, relative to current run start time
      [nhours]     , stops every stop_n nhours  , relative to current run start time
      [ndays]      , stops every stop_n ndays   , relative to current run start time
      [nmonths]    , stops every stop_n nmonths , relative to current run start time
      [nyears]     , stops every stop_n nyears  , relative to current run start time
      [monthly]    , stops every        month   , relative to current run start time
      [yearly]     , stops every        year    , relative to current run start time
      [end]        , stops at end
      [date]       , stops at stop_ymd value
    

      Stop time-of-day in universal time (seconds), should be between zero and 86400
      default: 0
    

      date in yyyymmdd format, sets the run length with stop_option and stop_n,
      can be in addition to stop_option and stop_n, negative value implies off
    

      Sets timing output file frequency (like restart_n)
    

      Sets timing output file frequency (like rest_option but relative to run start date)
      tprof_option alarms are:
      [none/never], turns option off
      [nsteps]   , every tprof_n nsteps  , relative to current run start time
      [nseconds] , every tprof_n nseconds, relative to current run start time
      [nminutes] , every tprof_n nminutes, relative to current run start time
      [nhours]   , every tprof_n nhours  , relative to current run start time
      [ndays]    , every tprof_n ndays   , relative to current run start time
      [nmonths]  , every tprof_n nmonths , relative to current run start time
      [nyears]   , every tprof_n nyears  , relative to current run start time
      [monthly]  , every         month   , relative to current run start time
      [yearly]   , every         year    , relative to current run start time
      [date]     , at tprof_ymd value
      [end]      , at end
    

      yyyymmdd format, sets timing output file date (like restart_date)
    

      wav coupling interval in seconds
      set via WAV_NCPL in env_run.xml.
      WAV_NCPL is the number of times the wav is coupled per NCPL_BASE_PERIOD
      NCPL_BASE_PERIOD is also set in env_run.xml and is the base period
      associated with NCPL coupling frequency, nad has valid values: hour,day,year,decade
    

      true => write restarts at end of run
      forces a restart write at the end of the run in addition to any
      setting associated with rest_option.  default=true.  this setting
      will be set to false if restart_option is none or never.
      default: true
    

      Colon-delimited list of initial water tracer ratios (as a fraction of total water).

      Each element in the list corresponds to an element in water_tracer_names.

      For water isotopes, this ratio is typically set to 1 for numerical reasons; the
      actual isotopic ratios can then be determined via reference to standard global
      ratios.
   

      Colon-delimited list of names of water tracers in this run.
   

      Colon-delimited list of species of water tracers in this run.

      Each element in the list corresponds to an element in water_tracer_names. A value of
      '-' for a given element indicates a standard water tracer (i.e., a tracer of bulk
      water).
   

      Check consistency between water tracer fields and their corresponding bulk fields.

      This should only be used with artificial tracers that maintain a fixed ratio.
   

      Type of water vapor saturation vapor pressure scheme employed. 'GoffGratch' for
      Goff and Gratch (1946); 'MurphyKoop' for Murphy and Koop (2005); 'Bolton' for
      Bolton (1980); 'Flatau' for Flatau, Walko, and Cotton (1992).
      Default: GoffGratch
    

      Temperature resolution of saturation vapor pressure lookup tables in Kelvin.
      (This is only used if wv_sat_use_tables is .true.)
      Default: 1.0
    

      Width of the liquid-ice transition range in mixed-phase water saturation vapor
      pressure calculations. The range always ends at 0 degrees Celsius, so this
      variable only affects the start of the transition.
      Default: 20K
      WARNING: CAM is tuned to the default value of this variable. Because it affects
      so many different parameterizations, changes to this variable may require a
      significant retuning of CAM's cloud physics to give reasonable results.
    

      Whether or not to produce lookup tables at init time to use as a cache for
      saturation vapor pressure.
      Default: .false.