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CCPP scheme simulator #378

Merged
merged 59 commits into from
Aug 3, 2023
Merged

CCPP scheme simulator #378

merged 59 commits into from
Aug 3, 2023

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dustinswales
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This PR adds a new functionality, a physics process scheme simulator, to the CCPP-physics.

Data-driven tendencies can be used to drive process schemes (e.g. PBL, Deep-Convection, etc..). The control over which schemes are used are set in a new physics namelist, scm_data_nml. These data tendencies are read in during the CCPP initialization stage, and applied during the _run stage, if requested by the nml. There are new interstitial variables for the data tendencies.

To use this feature on the host-model side the Suite Definition File (SDF) needs to be modified to include the ccpp_scheme_simulator scheme, and GFS_ccpp_scheme_sim_pre.

There are examples included that exercise this new tool. Documentation will follow.

@grantfirl
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Associated PR: NCAR/ccpp-physics#996

Next, the physics namelist needs to be configured to:
\begin{enumerate}
\item Add data file, \execout{suite\_sim\_file} created in \ref{section:Creating_Custom_Data_for_Simulator} to the namelist.
\item Turn ``off'' all schemes except the cloud microphysics (see Fig. \ref{lst_css_nml_ex2})
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@hertneky hertneky Jul 26, 2023

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fix reference here - should point to listing 7.2

\end{itemize}
\end{itemize}

For example, in Listing \ref{lst_css_nml}, there are two active schemes, longwave and shortwave radiaiton, and five simulated schemes: PBL, gravity-wave drag, deep/shallow convection, and cloud microphysics. The radiation, gravity-wave drag and PBL schemes are all process-split, whereas convection and cloud microphysics are time-split.
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It seems this is still pointing to the wrong Listing (looking at the most updated pdf)

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Fixed.

nfiles = 0
fileSCM = []
for nml in namelist:
fileSCM.append("../../../../scm/run/output_" + case_name + "_" + suite+"_"+nml+"/output.nc")
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This does not work for my test runs as the 'nml' is not appended to my case directory.
For example, when executing this script, it looks for
../../../../scm/run/output_MAGIC_LEG15A_SCM_GFS_v17_p8_input_GFS_v17_p8/output.nc does not exist.
But it is named:
../../../run/output_MAGIC_LEG15A_SCM_GFS_v17_p8/output.nc

It looks like the 3d works in this way as well.

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@hertneky Good catch. It should be fixed now.

@hertneky
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@dustinswales In input_GFS_v17_p8.nml, there is a parameter do_ccpp_suite_sim, but I don't see it documented. This looks like it is used by ccpp_suite_simulator.F90 and GFS_ccpp_suite_sim_pre.F90. Does this also need to exits and be turned on in the namelist?

@dustinswales
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@dustinswales In input_GFS_v17_p8.nml, there is a parameter do_ccpp_suite_sim, but I don't see it documented. This looks like it is used by ccpp_suite_simulator.F90 and GFS_ccpp_suite_sim_pre.F90. Does this also need to exits and be turned on in the namelist?

@hertneky Another good catch!
I updated the documentation, see section 7.2.5.

@dustinswales
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@mkavulich This is ready to merge. Can you approve?

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@mkavulich mkavulich left a comment

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@dustinswales Sorry this review is so late. The code changes look good but I have some minor documentation corrections. Otherwise good to go.

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@grantfirl grantfirl merged commit 16bbc00 into NCAR:main Aug 3, 2023
@dustinswales dustinswales deleted the ccpp_scheme_sim branch August 3, 2023 21:20
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4 participants