For detailed review of steps needed to create new grids in ACME see CAM-SE Variable Resolution Grid Generation, CIME documentation, and CESM 1.2 manual. and (most current) Running E3SM on New Atmosphere Grids .
This is a summary of steps required to create mapping/weighting/domain files for the model if one starts with an atmosphere, HOMME, mesh. We follow instructions in ACME and HOMME files with some modifications and clarifications.
...