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Table of Contents

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1. Be sure your environment matches the software environment loaded by E3SM by executing the output of this command:   e3sm/cime/scripts/Tools/get_case_env

2. Use cmake to configure and compile standalone HOMME.  On a supported platform with the CIME environement, this should work out-of-the-box.  See e3sm/cime/components/homme/README.cmake

3. compile the HOMME tool utility: 

   1. cd /path/to/workingdir 

   2. make -j4 homme_tool

   3. executable:   /path/to/workingdir/src/tool/homme_tool

4. Edit e3sm/components/homme/test/tool/namelist/template.nl and specify the grid resolution or RRM file

   1. For ne512, this would be set ne = 512. For RRM grids, leave ne = 0, but will need to edit where the exodus grid file comes from

   2. for non-RRM grids using the older E3SM v1 dycore, add cubed_sphere_map=0 to template.nl

5. See e3sm/components/homme/test/tool/test.job for examples of how to run the script and then use an NCL utilities to process the tool output into SCRIP and latlon formats.  

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# Checkout code
git clone git@github.com:ACMEE3SM-ClimateProject/PreAndPostProcessingScripts.git

# Set variable so we can refer to this directly below
PreAndPostProcessingScripts=${PWD}/PreAndPostProcessingScripts

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• land grid descriptor file in SCRIP format 

• ESMF_RegridWeightGen

• geographic distribution for each land surface type along with grid descriptor files for each of those surface types

• mkmapdata.sh (found in components/clm/tools/shared/mkmapdata/)

• mksurfdata.pl (found in components/clm/tools/clm4_5/mksurfdata_map/)

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