MIMICS updates, WIP

[wwieder]

Description of changes

code and parameter changes to address #2361

Specific notes

removes NPP control on turnover
fixes density dependent control on turnover
adds litterfall fluxes that bypass litter pools, directly contributing to SOM

Contributors other than yourself, if any:
@slevis-lmwg

CTSM Issues Fixed (include github issue #):
#2361

Are answers expected to change (and if so in what way)?
Soil C stocks will change with these code and parameter updates

Any User Interface Changes (namelist or namelist defaults changes)?
/glade/u/home/wwieder/scratch/mimics_NEON/modified parameter file available ctsm51_params.c240207b_v1.3_t1.5_b1.5.nc

Testing performed, if any:
scientific testing in single point cases is ongoing

[wwieder]

Changes to user_mods don't need to be included in this PR.

[wwieder]

@slevis-lmwg the parameter files listed above has mimics_fi added to it. Let me know if this looks OK to you.
Note, this also makes changes to several other MIMICS parameters (mimics_vint, mimics_densdep, & mimics_tau_mod)

[slevis-lmwg]

I checked out this branch, added the code that we discussed, and pointed to the above params file. The model builds and runs.

I tried to push back to the branch, but I do not have permissions.

The files to copy to your /SourceMods are:

/glade/work/slevis/git/vert_res_in_mimics/src/biogeochem/CNCStateUpdate1Mod.F90
/glade/work/slevis/git/vert_res_in_mimics/src/biogeochem/CNNStateUpdate1Mod.F90
/glade/work/slevis/git/vert_res_in_mimics/src/main/clm_varpar.F90
/glade/work/slevis/git/vert_res_in_mimics/src/main/pftconMod.F90
/glade/work/slevis/git/vert_res_in_mimics/src/soilbiogeochem/SoilBiogeochemDecompCascadeMIMICSMod.F90

[wwieder]

Thanks, Sam. Can you point me to the directory where your files are?

[slevis-lmwg]

Sorry for the omission! I updated the post with the full file paths now.

[wwieder]

That was a quick Friday afternoon! Thanks.

You can teach me how to grant permissions at some point, but I'll kick off a few runs with these code modifications and see how they look next week.

[wwieder]

also fixes #2248, by adding the density dependent microbial turnover (beta)

@elisacw, and @mvdebolskiy I've merged this PR up to the latest tag (ctsm5.2.028). I'll also point to an updated parameter file that can be found here.
/glade/derecho/scratch/wwieder/neon_AK/mods/ctsm60_params_vint1.3_taumod1.5_beta1.5.c240822.nc

[mvdebolskiy]

@elisacw, can you make an updated parameterfile with mimicsplus params out of the one Will pointed to?