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changes.mady.by.user Tanya Reshel

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Warning
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  NERSC Directory Change Notice  

Due to project's name change at NERSC from 'ACME' to 'E3SM' and NERSC’s file system update, the directory  '/project/projectdirs/acme/' is now '/cfs/cdirs/e3sm'

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  1. For cubed sphere grids:
    1. Set resolution via set ne = 4  (for ne4 example here).
    2. Set  smooth_phis_numcycle=16.    (adjustable paramemter, lower for less smoothing)
    3. Set smooth_phis_nudt.  This is a resolution dependent parameter, recommend value for cubed sphere grids is 28e7 * ( 30/NE)**2
  2. For RRM grids, we use the tensor laplace operator so that the amount of smoothing is proportional to the resolution
    1. ne=0, mesh_file=/path/to/exodus-rrm-grid-file.g
    2. Set  smooth_phis_numcycle=12.    (adjustable paramemter, lower for less smoothing)
    3. smooth_phis_nudt = 4e-16.  
  3. Set infilenames=/path/to/unsmoothed/PHISdata

After running the tool, the output will be named "geos", in the file there should be output file 'phis-smoothed1.nc, along with other unnecessary fields' with one of the fields named "PHIS".  To convert this file into an EAM topo file:

Step (c)

The topography tool then needs to be re-ran to compute the subgrid surface roughness. This is done by passing an extra argument to the topography tool with the smoothed topography output from the standalone HOMME run above:

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