1-deg I-case spin-up and historical to test new paramfile for CESM3 (ctsm53019_f09_BNF_[AD, SASU, pSASU, hist])

[linniahawkins]

Description:
Testing a new parameter set for CESM3. Documentation, paramfile details, and evaluation on sparse grid here

Paramfile change log from ctsm60_c240208.nc (i.e., CLM5.2 params)

• Add Nfix params for BNF parameterization (nfix_tmin, nfix_topt, nfix_tmax)

• Fangs new fire parameterization (rswf_max, rswf_min, fsr_pft, others…)

• Undo dead veg tuning of FUN_fracfixers in arctic (FUN_fracfixers=0.25 for all pfts again)

• Reduce LAI in the tropics without inducing water stress (pft 4,6)

• Reduce LAI and GPP in needleleaf forests (pft 1,2,3)

• Increase mid-latitude evapotranspiration (pft 1,2)

• Reduce arctic LAI for C3 grasses and arctic shrubs (pft 11,12)

• Increase C3 grass LAI (survivability)

• Relax nitrogen limitation in C4 grass to improve survivability (KCN parameters)

• Use t232 ocean mask

Thanks!

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Case directory:

./create_newcase --case ~slevis/cases_LMWG_dev/ctsm53019_f09_BNF_AD --compset I1850Clm60BgcCropCru --res f09_t232 --run-unsupported
./create_clone --case ~slevis/cases_LMWG_dev/ctsm53019_f09_BNF_SASU --clone ~slevis/cases_LMWG_dev/ctsm53019_f09_BNF_AD
./create_clone --case ~slevis/cases_LMWG_dev/ctsm53019_f09_BNF_pSASU --clone ~slevis/cases_LMWG_dev/ctsm53019_f09_BNF_SASU

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Sandbox:
/glade/work/slevis/git_ctsm_tags/ctsm5.3.019 (currently the latest ctsm tag)
In #88 and #89 (here) I had to update cime6.1.49 to cime6.1.56 to avoid the rpointer.cpl bug at restart...

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user_nl_ changes:
AD

nfix_method = 'Bytnerowicz'
paramfile = /glade/u/home/linnia/ctsm6_ppe/gen_ensembles/jobscripts/test/gen_paramfiles/ctsm5.3.012.Nfix_params.v9.c250112.nc' (feel free to rename this something 'sensible)

hist_fincl1 = 'TOTECOSYSC', 'TOTECOSYSN', 'TOTSOMC', 'TOTSOMN', 'TOTVEGC', 'TOTVEGN', 'TLAI', 'GPP', 'CPOOL', 'NPP', 'TWS','H2OSNO','NFIX'

do_grossunrep=.false.

! do this for isotopes
use_c13 = .true.
use_c14 = .true.
use_c13_timeseries = .true.
use_c14_bombspike = .true.

During the spin-up, we also set MOSART_MODE = NULL in env_build.xml

SASU and pSASU same as AD plus
reseed_dead_plants = .true.

hist see #69 and Sam R's post below; also run last 20-30 yrs with pft survivability output

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SourceMods:
None.

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Diagnostics:
Compare to #69

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Output:
Shown for AD and similar for all the cases.
Initially:
/glade/derecho/scratch/slevis/ctsm53019_f09_BNF_AD/run
Later:
/glade/derecho/scratch/slevis/archive/ctsm53019_f09_BNF_AD
Later possibly:
/glade/campaign/cgd/tss/people/slevis/i_cases/cases_LMWG_dev/ctsm53019_f09_BNF_AD

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Contacts:
@slevis-lmwg

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Extra details:
Plan
AD startup 360 yrs, 2.18% disequilibrium
SASU hybrid 320 yrs, 11.78% disequilibrium
pSASU hybrid 160 yrs, ??% disequilibrium IN PROG
hist 1850-2023

[olyson]

Regarding the ocean mask, I think the choice here for --res would be f09_t232.
I'm on PTO beginning in about a half-hour :), so I can either get this going next Tues or is @slevis-lmwg available/willing?

[wwieder]

For the ocean mask to work on the f09_t232 grid this has to be manually added to ccs_config
https://github.com/ESMCI/ccs_config_cesm/pull/205/files

@slevis-lmwg do you think you can start an AD/SASU/pSASU spinup before next week, or should I do this one?

• Namelist changes should basically be the same as CTSM 5.3 Spinup and HIST on f09 grid (2nd Attempt - with li2024crujra fire ON this time and using filled Antarctica datm data)  #69 for the setup + changes Linnia noted above (parameter file + nfix method)
• Create case with t232 grid

[slevis-lmwg]

@slevis-lmwg do you think you can start an AD/SASU/pSASU spinup before next week, or should I do this one? We can talk tomorrow at our 10:00?

Yes, absolutely!

[samsrabin]

@slevis-lmwg For my upcoming crop calibration work, could you save the following instantaneous variables at annual frequency during the historical period?

'SDATES', 'SDATES_PERHARV', 'SYEARS_PERHARV', 'HDATES', 'GRAINC_TO_FOOD_PERHARV', 'GRAINC_TO_FOOD_ANN', 'GRAINN_TO_FOOD_PERHARV', 'GRAINN_TO_FOOD_ANN', 'GRAINC_TO_SEED_PERHARV', 'GRAINC_TO_SEED_ANN', 'GRAINN_TO_SEED_PERHARV', 'GRAINN_TO_SEED_ANN', 'HDATES', 'GDDHARV_PERHARV', 'GDDACCUM_PERHARV', 'HUI_PERHARV', 'SOWING_REASON_PERHARV', 'HARVEST_REASON_PERHARV', 'SWINDOW_STARTS', 'SWINDOW_ENDS', 'GDD20_BASELINE', 'GDD20_SEASON_START', 'GDD20_SEASON_END'

It would also be great to have a restart available around the mid-20th century. Thanks!

[slevis-lmwg]

UPDATE
I've been monitoring the spin-up, and I just started the pSASU phase.