Welcome to the new DiscussCESM forum!
We are still working on the website migration, so you may experience downtime during this process.

Existing users, please reset your password before logging in here: https://xenforo.cgd.ucar.edu/cesm/index.php?lost-password/

Set up of MOM6 vertical structure


New Member
Hello MOM6 community,

I would like to know how to set up the vertical structure of MOM6, especially the hybrid structure with z-layers in the top and isopycnals in the deep interior ocean. My main interest is in the Indian Ocean. I have looked in /MOM6-examples-dev-gfdl/ice_ocean_SIS2/OM4_025/preprocessing but could not find any script to generate or tweak the hybrid vertical structure of MOM6.

I have also checked in MOM6-examples-dev-gfdl/ocean_only/global_ALE/hycom but to no avail. There are vertical grid files such as hycom1_50 but it is not clear how they are generated.

Any help will be much appreciated.

Thank you.


Alistair Adcroft
New Member
We don't have a tool to do this right now. These files were created by hand (and under a time constraint). I am currently working on new coordinate profiles for OM4 and will post a jupyter notebook once things are working. Frankly, it takes a bit of trial and error to get hybrid coordinate profiles that make any sense. For a new domain, it might be easier to start with a pure z*-coordinate and then design the hybrid coordinate once all the other engineering is done.