Page Comparison

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1. Identify a compset similar to your desired new compset, which will be your starting point for making changes.
2. Collect a list of all non-default namelist options, input files, and compile options that are needed to fully specify your configuration.  These will include any changes relative to your baseline compset identified in the previous step.
   
   1. Note: if your configuration requires a user-provided atmospheric chemistry mechanism, please run the stand-alone chemistry pre-processor and add the auto-generated code to the model first before adding a compset.  The reason for doing this is that the chemistry pre-processor does not build smoothly on all systems, which will prevent your compset from running smoothly on many systems.
3. Edit the file cime/scripts/Tools/config_compsets.xml
   1. If your configuration requires providing compile-time options to cam (specified via CAM_CONFIG_OPTS), create a new CAM_CONFIG_OPTS specification, e.g.:

      1. <CAM_CONFIG_OPTS compset="_CAM5%ATMMOD"   >-clubb_sgs -microphys mg2 -chem linoz_mam4_resus_mom -rain_evap_to_coarse_aero</CAM_CONFIG_OPTS>

   2. Copy and edit the definition of the compset's full name, short name and alias:
      1. Example compset name, short name, and alias : <COMPSET sname="F_2000_CAM5"                alias="FC5"             >2000_CAM5_CLM40%SP_CICE%PRES_DOCN%DOM_RTM_SGLC_SWAV</COMPSET>
         
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Links to more information

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