fff, Land only (ctsm51_cesm23a16bctsm51d130_ne30pg3ne30pg3mg17_GSWP3V1_SturmSnowtk_fff_1850)

[wwieder]

Description: The coupled and land only PPE projects identified fff (the decay factor for fractional saturated area) as a parameter that could help snow melt. Ultimately, this may be better for coupled runs, but we'll test it here for starters.

It looks the the default value for fff is 0.5, which was set to 0.02 in the PPE

I'd build on the Sturm case, #10

• starting an AD spinup with initial conditions from the postAD Sturm run
• setting reseed=.true.

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Case directory: Locally: /glade/work/oleson/cesm2_3_alpha16b/cime/scripts/ctsm51_cesm23a16bctsm51d130_ne30pg3ne30pg3mg17_SturmSnowtk_fffGSWP3V1(1850AD, 1850pAD, 1850)

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Sandbox: Locally: /glade/work/oleson/cesm2_3_alpha16b

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usernl changes: hist_fincl1 = 'TOTECOSYSC', 'TOTECOSYSN', 'TOTSOMC', 'TOTSOMN', 'TOTVEGC', 'TOTVEGN', 'TLAI', 'GPP', 'CPOOL', 'NPP', 'TWS', 'H2OSNO','NDEP_TO_SMINN' use_c13 = .true. use_c14 = .true. use_c13_timeseries = .true. use_c14_bombspike = .true. fsurdat = '/glade/work/slevis/git/mksurfdata_toolchain/tools/mksurfdata_esmf/surfdata_ne30np4.pg3_SSP5-8.5_78pfts_CMIP6_1850-2100_c230227.nc' finidat = '/glade/scratch/oleson/archive/ctsm51_cesm23a16bctsm51d130_ne30pg3ne30pg3mg17_GSWP3V1_SturmSnowtk_1850pAD/rest/0401-01-01-00000/ctsm51_cesm23a16bctsm51d130_ne30pg3ne30pg3mg17_GSWP3V1_SturmSnowtk_1850pAD.clm2.r.0401-01-01-00000.nc' paramfile = '/glade/p/cgd/tss/people/oleson/modify_param/ctsm51_params.c211112.nc.fff.nc' (fff=0.02)

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SourceMods:

src.clm/atm2lndType.F90: Add some additional history fields src.clm/clm_varpar.F90: nlevurb=5 -> nlevurb=10 src.clm/surfrdMod.F90: Remove read of PFTDATA_MASK src.clm/Wateratm2lndType.F90: Add some additional history fields src.clm/SoilTemperatureMod.F90 Sturm Snow tk

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Diagnostics: Diags (if available)

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Output: Output (if still available): /glade/campaign/cgd/tss/common/Land_Only_Simulations/CTSM52_DEV/ctsm51_cesm23a16bctsm51d130_ne30pg3ne30pg3mg17_SturmSnowtk_fff_GSWP3V1_1850AD/ /glade/campaign/cgd/tss/common/Land_Only_Simulations/CTSM52_DEV/ctsm51_cesm23a16bctsm51d130_ne30pg3ne30pg3mg17_SturmSnowtk_fff_GSWP3V1_1850pAD/ /glade/campaign/cgd/tss/common/Land_Only_Simulations/CTSM52_DEV/ctsm51_cesm23a16bctsm51d130_ne30pg3ne30pg3mg17_SturmSnowtk_fff_GSWP3V1_1850/

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Contacts: @olyson @wwieder

Extra details: See discussion in https://github.com/NCAR/LMWG_dev/discussions/3 AD spunup to 1.51% disequilibrium, 160 years pAD spunup to 4.08% disequilibrium, 440 years Complete

[olyson]

I'll work on this when I'm back on Tues.

[olyson]