Instructions for the Coupled Model

How to build?

Can be found at this link.

To make your life easy, following is a summary:

1. ml GEOSenv
2. cd <your_dir>
3. git clone -b v10.23.1 [email protected]:GEOS-ESM/GEOSgcm.git See here for full details. Its obvious that we are building a set version, i.e., v10.23.1 (released on Nov 18, 20222) which will facilitate reproducibility.
4. cd GEOSgcm/
5. parallel_build.csh

Check: grep 'exit ' parallel_build.oxx; xx is a number that is generated by slurm when the build job is submitted to queue. If you get:

exit 0

all went okay!

How to set up an experiment?

• We will use gcm_setup. See here for instructions.
• Options to be selected are mostly defaults and are same as the uncoupled model, see ⬇️ for differences.

 ...
 ...
 Do you wish to run the COUPLED Ocean/Sea-Ice Model? (Default: NO or FALSE)
 YES

 Choose an Ocean Model: (Default: MOM5)
 MOM5
 _or_
 MOM6

 Enter the Ocean Lat/Lon Horizontal Resolution: IM JM (Default: 360 210)
 1440 1080
 Enter the Ocean Model Vertical Resolution: LM (Default: 50)
 75
 ...
 ...
 ...

• If the horizontal and/or vertical resolutions are not the default values, it is the user's burden to provide all other files and resources for a functional model run. Available resolutions are:

  • MOM5: c180x72 atmosphere, 1440x1080x50 ocean
  • MOM6: c180x72 atmosphere, 1440x1080x75 ocean

How to run?

In the experiment directory, use gcm_run.j (this step is same as for the uncoupled model).