Things needed in CTSM6 for Emissions driven simulations

[ekluzek]

For cesm3.0 we need to have emissions driven simulations run. This requires for the emission driven capabilities to be: in place, tested and verified to work correctly.

Emissions driven simulations have been run based off of the cesm2.1.5 release. Here's a repository for that:

https://github.com/lawrencepj1/CESM2.1.5-CCIS-Ens

for the tag: baselines_tag_06

The version of CTSM used is based off of release-clm5.0.37 and is tagged as active-bvocs_tag_01
The fork for CTSM is: https://github.com/lawrencepj1/CESM2.1.5-CLM5-New-Land-Use

There are some small namelist differences, bringing in a FUN fix (that's on CTSM master) and some changes to fire-emissions, that look like they need to come to master.

A git diff shows:

git diff --stat release-clm5.0.0 
 bld/CLMBuildNamelist.pm                       |  1 -
 bld/namelist_files/use_cases/1850_control.xml |  2 +-
 src/biogeochem/CNFUNMod.F90                   |  7 ++++---
 src/biogeochem/CNFireEmissionsMod.F90         | 27 +++++++++++++++++++--------
 src/biogeochem/CNPhenologyMod.F90             | 46 +++++++++++++++++++++++++++++++++++-----------
 5 files changed, 59 insertions(+), 24 deletions(-)

For the fully coupled case, the compset used is: BHIST_BPRPcmip6, which has the longname:

HIST_CAM60_CLM50%BGC-CROP-CMIP6DECK_CICE%CMIP6_POP2%ECO%ABIO-DIC_MOSART_CISM2%NOEVOLVE_WW3_BGC%BPRP

(So the CMIP6 user-mods are used to get the standard CMIP6 output)

Changes in user_nl_clm, are mostly changes to history output, but also turning on carbon isotopes. As well as this important change for irrigation:

! Increase Irrigation Target SMP to better match other crops besides wheat

irrig_target_smp = -1500.

Anb the following settings for fire-emissions and megan:

! Fire emission file and factor settings

fire_emis_factors_file = '/glade/campaign/cgd/tss/lawrence/ccisensinput/fire_emission_factors/fire_emission_factors_78PFTs_ACTIVEFIRE_c20240529.nc'
fire_emis_specifier = 'bc_a4 = BC', 'pom_a4 = 1.4 * OC', 'num_a4 = num_a4_bc + num_a4_pom', 'SO2 = SO2', 'DMS = DMS',
       'SOAG = 0.45 * BIGALK + 0.35 * BIGENE + 1.725 * TOLUENE + 1.4625 * BENZENE + 1.9875 * XYLENE + 0.34 * ISOP + 4.25 * C10H16'
fire_emis_elevated = .false.

! BVOC emission file and factor settings

megan_factors_file = '/glade/campaign/cgd/tss/lawrence/ccisensinput/megan_emission_factors/megan21_emis_factors_78pft_ACTIVEBVOC_c20240529.nc'
megan_mapped_emisfctrs = .false.
megan_specifier = 'SOAG = 0.25 * isoprene + 2.15 * (carene_3 + pinene_a + thujene_a + bornene +',
      'terpineol_4 + terpineol_a + terpinyl_ACT_a + myrtenal + sabinene + pinene_b + camphene +',
      'fenchene_a + limonene + phellandrene_a + terpinene_a + terpinene_g + terpinolene +',
      'phellandrene_b + linalool + ionone_b + geranyl_acetone + neryl_acetone + jasmone +',
      'verbenene + ipsenol + myrcene + ocimene_t_b + ocimene_al + ocimene_c_b + 2met_nonatriene) + ',
      '5.25 * (farnescene_a + caryophyllene_b + acoradiene + aromadendrene + bergamotene_a +',
      'bergamotene_b + bisabolene_a + bisabolene_b + bourbonene_b + cadinene_d + cadinene_g +',
      'cedrene_a + copaene_a + cubebene_a + cubebene_b + elemene_b + farnescene_b +',
      'germacrene_B + germacrene_D + gurjunene_b + humulene_a + humulene_g + isolongifolene +',
      'longifolene + longipinene + muurolene_a + muurolene_g + selinene_b + selinene_d +',
      'nerolidol_c + nerolidol_t)'

XML settings that are important are:

	CLM_CO2_TYPE: prognostic
	CCSM_BGC: CO2C

[ekluzek]

@lawrencepj1 is the irrigation change something that we'll want in the cesm3_0 release for ctsm6?

[ekluzek]

There are also changes in: POP, CICE, and cime. There are also a bunch of settings for CAM and new files that will need to be handled. For these purposes I don't think the POP or CICE changes matter. The cime changes have to do with the expressions for MEGAN and have already come into the cesm3_0 code base.

So I think the things that have to be handled for CTSM are:

• MEGAN namelist settings
• fire-emission namelist settings
• fire-emission code changes
• Move Peter's files to CESM inputdata and rimport them