Model Version: 3.0a
Component Tag:
cdeps1.0.96
HTML Created:
2026-07-02

Use the CASEROOT tools xmlquery to query these variables and xmlchange to change their values.

Parameter Name Default Value Data Type Group CASEROOT File Valid Values Description
COMP_ATM datm char case_comp env_case.xml ['datm'] 
Name of atmospheric component
DATM_MODE CORE2_NYF char run_component_datm env_run.xml ['CORE2_NYF', 'CORE2_IAF', 'CLM_QIAN', 'CLM_QIAN_WISO', '1PT', 'CLMCRUJRA2024', 'CLMCRUJRA2024b', 'CLMCRUNCEPv7', 'CLMGSWP3v1', 'CLMNLDAS2', 'CPLHIST', 'CORE_IAF_JRA', 'CORE_IAF_JRA_1p4_2018', 'CORE_IAF_JRA_1p5_2023', 'CORE_RYF6162_JRA', 'CORE_RYF8485_JRA', 'CORE_RYF9091_JRA', 'CORE_RYF0304_JRA', 'ERA5', 'SIMPLE'] 
Mode for data atmosphere component.
      CORE2_NYF (CORE2 normal year forcing) are modes used in forcing prognostic ocean/sea-ice components.
      CLMCRUJRA2024, CLMCRUJRA2024b, CLMCRUNCEPv7, CLMGSWP3v1, CLMNLDAS2 and 1PT are modes using observational data for forcing prognostic land components.
      WARNING for CLMNLDAS2: This is a regional forcing dataset over the U.S. (25-53N, 235-293E). Garbage data will be produced for runs extending beyond this regional domain.
DATM_PRESAERO clim_2000 char run_component_datm env_run.xml ['none', 'clim_1850', 'clim_2000', 'clim_2010', 'hist', 'SSP1-1.9', 'SSP1-2.6', 'SSP2-4.5', 'SSP3-7.0', 'SSP4-3.4', 'SSP4-6.0', 'SSP5-3.4', 'SSP5-8.5', 'cplhist'] 
DATM prescribed aerosol forcing
DATM_PRESNDEP clim_2000 char run_component_datm env_run.xml ['none', 'clim_1850_cmip7', 'clim_2000_cmip7', 'clim_2010_cmip7', 'hist_cmip7', 'clim_1850_cmip6', 'clim_2000_cmip6', 'clim_2010_cmip6', 'hist_cmip6', 'SSP1-2.6', 'SSP2-4.5', 'SSP3-7.0', 'SSP5-3.4', 'SSP5-8.5', 'cplhist'] 
DATM prescribed nitrogen deposition forcing
DATM_PRESO3 clim_2000 char run_component_datm env_run.xml ['none', 'clim_1850', 'clim_2000', 'clim_2010', 'hist', 'SSP2-4.5', 'SSP3-7.0', 'SSP5-8.5'] 
DATM prescribed ozone forcing
DATM_TOPO observed char run_component_datm env_run.xml ['none', 'observed', 'cplhist'] 
DATM surface topography forcing
DATM_CO2_TSERIES none char run_component_datm env_run.xml ['none', 'cplhist', 'cmip6_20tr', 'cmip7_20tr', 'omip.iaf', 'omip.jra', 'SSP1-1.9', 'SSP1-2.6', 'SSP2-4.5', 'SSP3-7.0', 'SSP4-3.4', 'SSP4-6.0', 'SSP5-3.4', 'SSP5-8.5'] 
DATM CO2 time series
DATM_CPLHIST_DOMAIN_FILE null char run_component_datm env_run.xml None 
      Full pathname for domain file for datm when DATM_MODE is
      CPLHIST, NOTE: if this is set to 'null' (the default), then
      domain information is read in from the first coupler history
      file in the target stream and it is assumed that the first
      coupler stream file that is pointed to contains the domain
      information for that stream.
DATM_CPLHIST_DIR UNSET char run_component_datm env_run.xml None 
directory for coupler history data mode (only used for when DATM_MODE is CPLHIST)
DATM_CPLHIST_CASE UNSET char run_component_datm env_run.xml None 
case name used to determine stream filenames when DATM_MODE is CPLHIST
DATM_YR_ALIGN 1 integer run_component_datm env_run.xml None 
      Simulation year corresponding to DATM_YR_START. A common usage
      is to set this to RUN_STARTDATE. With this setting, the forcing
      in the first year of the run will be the forcing of year
      DATM_YR_START. Another use case is to align the calendar
      of transient forcing with the model calendar. For example,
      setting DATM_YR_ALIGN=DATM_YR_START will lead to
      the forcing calendar being the same as the model calendar. The
      forcing for a given model year would be the forcing of the same
      year. This would be appropriate in transient runs where the
      model calendar is setup to span the same year range as the
      forcing data.
DATM_YR_START 2004 integer run_component_datm env_run.xml None 
starting year to loop data over
DATM_YR_START_FILENAME 9999 integer run_component_datm env_run.xml None 
Start year listed in PLUMBER2 filenames for certain datm_modes. Currently only used in PLUMBER2; leave as the default value (9999) for other cases.
DATM_YR_END 2004 integer run_component_datm env_run.xml None 
ending year to loop data over
DATM_SKIP_RESTART_READ FALSE logical run_component_datm env_run.xml ['TRUE', 'FALSE'] 
 If set to true, than datm restarts will not be read on a continuation run.
      This capability is used, for example, in CTSM spinup runs.
Parameter Name Default Value Data Type Group CASEROOT File Valid Values Description