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This page documents how to configure, build and run standalone HOMME (EAM dynamical core) for idealized test cases on a supported platform.

Directories: (set these variables based on your configuration/preferences and target machine):

e3sm = /path/to/github/code/checkout/E3SM
homme = $e3sm/components/homme
wdir = /path/to/working/directory
mach = $homme/cmake/machineFiles/cori-knl (see directory for other supported machines)

  1. Load the same modules that a full E3SM case would load:

    1. E3SM’s CIME provides a script which will give the csh output needed to load the correct modules and other configuration settings:

    2. eval `~/codes/acme/cime/scripts/Tools/get_case_env`

    3. Most users will be using the bash shell, in which case examine the output of ~/codes/acme/cime/scripts/Tools/get_case_env and modify to work with bash

  2. Run cmake from your $wdir

    1. cd $wdir

    2. cmake -C $mach $homme

    3. make -j4 theta-l (optional step to see if code will compile)

  3. Run DCMIP2012 Test 3-1 (simple gravity wave)

    1. cd $wdir/dcmip_tests/dcmip2012_test3.1_nh_gravity_waves/theta-l

    2. make install (copies test case related files from $homme)

    3. ./build.sh (build the correct executable with correct compile time options for this test)

    4. ls jobscript-sh*.

      1. look for a suitable jobscript for your machine. most test cases include “jobscript-snl.sh” which runs on E3SM institutional clusters, and jobscript-knl.sh for NERSC Cori. Some editing may be neccessary.

      2. The jobscript usually runs included NCL scripts for creating standard test case plots from the output

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