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Make the following ./xmlchange commands:
If you want to construct your own grid (e.g. for RRM), see Running E3SM on New Grids
./xmlchange ATM_NCPL . Note that this is the number of atm timesteps per day so the model timestep (commonly known as dtime) is 86400 sec/ATM_NCPL. See the dycore settings link at the end of this section for guidance on choosing dtime.
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