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Please follow the steps below when wanting to run the regionally refined model (RRM) CONUS grid in ACME.

Step-by-step guide

Check-out the ACME's RRM branch:

  1. Checkout the tangq/cam/RRM branch - see Development Quick Start for details

 

Create and build a new case from the scripts directory:

  1. Suggested syntax:
    $ ./create_newcase -case $CASENAME -compset FC5 -mach (your-machine-name-here) -res conusx4v1_conusx4v1
  2. Edit env_mach_pes.xml.  For Redsky, using 200 cores and 1 thread for each component runs at 0.25 simulated years per day.
  3. Edit env_run.xml. 
    1. For a 5 year free-run on Redsky, (throwing out 1 year)
      1. set RUN_STARTDATE equal to 0001-01-01
      2. set STOP_OPTION equal to nmonths
      3. set STOP_N equal to 12
      4. set REST_N equal to 6
      5. set RESUBMIT equal to 6
      6. set ATM_NCPL equal to 96
    Set-up and build the case. 
    $ ./cesm_setup   
    $ ./$CASENAME.build  (When building a case for the first time, the script will look for the boundary and initial condition files.   The RRM team plans to push that data to the ACME server, /wiki/spaces/WORKFLOW/pages/7998629.  Contact the RRM team for those files until the data is there.  This page will be updated to reflect that change.)
  4. Edit user_nl_clm to include spun-up land initial condition file.
    ::::::::::::::
    user_nl_clm
    ::::::::::::::
    finidat = '/projects/ccsm/inputdata/lnd/clm2/initdata/clmi.conusx4v1.2000-01-01_c141106.nc'
  5. Edit user_nl_cam to include changes to the se-dycore.
    ::::::::::::::
    user_nl_cam
    ::::::::::::::
    ! Convection:
    cldfrc_rhminl          = 0.91         
    cldfrc_dp1              = 0.025            
    zmconv_c0_lnd     = 0.0035
    zmconv_c0_ocn    = 0.0035
    zmconv_tau           = 3000    

    ! Aerosols:
    soil_erod_file  = '/your/path/to/inputdata/atm/cam/dst/dst_1.9x2.5_c090203.nc'
    dust_emis_fact  = 1.05D0    

    ! Dycore grid specific settings (Timesteps and viscosity):
    se_nsplit     = 4 
    hypervis_subcycle= 7
    nu         = 8.0e-8
    nu_div         = 20.0e-8
    nu_p         = 8.0e-8
    hypervis_scaling= 3.2
    se_ne        = 0
    mesh_file       = '/path/to/gridfile/conusx4v1.g'

 

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