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Create a directory in your /glade/work/$USER/ space for a repository of your created files ($REPO).  For example, :

• $REPO =  /glade/work/emmons/tutorial_Nanjing/ne0np4.Nanjing.ne30x8/

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Create a new variable resolution mesh (VRM)

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On casper start the VRM Editor from your $REPO/grids directory:

> cd $REPO/grids
> /glade/work/emmons/tutorial_Nanjing/VRM_tools/VRM_Editor/src/VRM_Editor

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Plot EXODUS file with /glade/u/home/emmons/tutorial_Nanjing_notebooks/Plot_exodus_grid.ipynb

Create grid files

Several types of grid files need to be created. 

Create SCRIP and LATLON grid files from EXODUS file

On casper:

> cd $REPO/grids

> cp /glade/work/emmons/tutorial_Nanjing/VRM_tools/VRM_ControlVolumes/src/input.nl input-Nanjing.nl

Edit input-Nanjing_ne30x8.nl to have your path to $REPO/grids and the grid name.  Then run Gen_ControlVolumes:

> /glade/work/emmons/tutorial_Nanjing/VRM_tools/VRM_ControlVolumes/src/Gen_ControlVolumes.exe input-Nanjing.nl > LOG_Nanjing

This produces Nanjing_ne30x8_np4_SCRIP.nc and Nanjing_ne30x8_np4_LATLON.nc

Examine the LATLON file to get the number of columns in your new grid:

> ncdump -h Nanjing_ne30x8_np4_LATLON.nc

This prints (among other things):

    ncol = 60482 ;

Create ESMF mesh file from SCRIP file

On casper, load needed modules:

> module load mpi-serial/2.3.0

> module load esmf/8.5.0

To find the path toESMF_Scrip2Unstruct, run:

> module show esmf/8.5.0

Find the listing for the "PATH" directory:

"PATH","/glade/u/apps/casper/23.10/spack/opt/spack/esmf/8.5.0/mpi-serial/2.3.0/oneapi/2023.2.1/dfkx/bin"

In the directory with your SCRIP file, run:

> /glade/u/apps/casper/23.10/spack/opt/spack/esmf/8.5.0/mpi-serial/2.3.0/oneapi/2023.2.1/dfkx/bin/ESMF_Scrip2Unstruct Nanjing_ne30x8_np4_SCRIP.nc Nanjing_ne30x8_np4_MESH.nc

Generate CESM input files on new grid

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