Make forecasts with initial conditions generated by chgres_cube

JEDI
1

Q1. Are there any example yaml files for forecasts only with FV3-JEDI.
Q2. I noticed that the tests included in the FV3-JEDI are using restart files from the UFS weather model (fv_core.res.tile[1-6].nc, fv_srf_wnd.res.tile[1-6].nc, fv_tracer.res.tile[1-6].nc, and sfc_data.tile[1-6].nc). Is it possible to initialize a forecast with the output from chgres_cube execution (namely atm.tile[1-6].nc and sfc.tile[1-6].nc files) ?
Much thanks in advance!

2

You could take a look at https://github.com/JCSDA-internal/fv3-jedi/blob/develop/test/testinput/forecast_ufs.yaml

3

Thanks for your response! Daniel!
The url you kindly shared with me is an internal link. But following the hierarchy I located the sample file forecast_ufs.yaml. I am not sure the one I am seeing under the master is the same as the one you wanted to share with me or not. My questions are:

  1. To use the UFS with physics under JEDI, do I have to enable the UFS at the installation step?
  2. The yaml files specified the paths of restart files (fv_core.res.tile[1-6].nc, fv_srf_wnd.res.tile[1-6].nc, fv_tracer.res.tile[1-6].nc, and sfc_data.tile[1-6].nc). Is there a way I can initialize the forecast with the output from chgres_cute execution (namely atm.tile[1-6].nc and sfc.tile[1-6].nc files)?
    Thanks again!
4

You would need to build fv3-jedi with UFS yes. But this isn’t something that we support in public releases yet. It’s a feature in develop and is still a relatively new feature. We haven’t tested running from cold starts yet but it should be possible. We have a utility in fv3-jedi for converting cold start to warm start but this isn’t supported in a release yet either. There’s an example yaml for doing that in the test/testinput directory of the develop branch.

5

Thank you for the information!