n1850.ne30_tn14.noresm3_0_beta01.cam_energy_conserv.20250718

[matsbn]

Purpose:

Test noresm3_0_beta01 with improved CAM energy conservation and enthalpy flux between atmosphere and ocean (implementation by Thomas Toniazzo with assistance to incorporate the implementation in the recent code base by Øyvind Seland).

---

Description:

The experiment is comparable to #190 and, except for code based on noresm3_0_beta01, but updated with PRs implementing improved CAM energy conservation and enthapy flux exchange.

To get the code

git clone https://github.com/NorESMhub/NorESM.git
cd NorESM
git checkout noresm3_0_beta01
./bin/git-fleximod update

Local code base

/cluster/projects/nn9560k/matsbn/GitHub/matsbn/noresm3_0_beta01_enthalpy_PRs

The local base is updated with the merging of the following PRs:

• components/cam: Added options for enthalpy correction and new ZM options CAM#227 (needed to manually correct the merge of bld/namelist_files/namelist_definition.xml)
• components/cam/src/chemistry/oslo_aero: Modification needed for improved enthalpy calculations OSLO_AERO#58
• components/cmeps: Added options for comunication of enthalpy correction to the coupled system CMEPS#36
• components/blom: Adding heat flux due to material enthalpy flux of water exchange with atmosphere BLOM#618

Create the case with

/cluster/projects/nn9560k/matsbn/GitHub/matsbn/noresm3_0_beta01_enthalpy_PRs/cime/scripts/create_newcase --case /cluster/projects/nn9560k/matsbn/NorESM/cases/n1850.ne30_tn14.noresm3_0_beta01.cam_energy_conserv.20250718 --compset 1850_CAM70%LT%NORESM%CAMoslo_CLM60%FATES_CICE_BLOM%HYB%ECO_MOSART_DGLC%NOEVOLVE_SWAV_SESP --res ne30pg3_tn14 --project nn9560k --machine betzy --run-unsupported --user-mods-dir /cluster/projects/nn9560k/matsbn/GitHub/matsbn/noresm3_0_beta01_enthalpy_PRs/cime_config/usermods_dirs/reduced_out_devsim/

SourceMods

• SourceMods/src.drv/med_phases_prep_ocn_mod.F90 (set separate_varlat = .true.)
• SourceMods/src.blom/ocn_import_export.F90 (set hmat_method = 2)

• user_nl_cam

use_aerocom = .false.
rafsip_on = .true.
interpolate_nlat   = 192
interpolate_nlon   = 288
interpolate_output = .true.
history_aerosol = .false.
zmconv_c0_lnd  =  0.0075D0
zmconv_c0_ocn  =  0.0300D0
zmconv_ke =  5.0E-6
zmconv_ke_lnd =  1.0E-5
clim_modal_aero_top_press =  1.D-4
micro_mg_dcs = 650.D-6
clubb_c8 = 4.0
bndtvg = '/cluster/shared/noresm/inputdata/atm/cam/ggas/noaamisc.r8.nc'
dust_emis_method = 'Leung_2023'
dust_emis_fact = 9.20D0
compute_enthalpy_flux = .true.

• user_nl_clm

fates_history_dimlevel = 1,2
hist_fexcl1='ACTUAL_IMMOB','BTRANMN','EFLXBUILD','EFLX_DYNBAL','EFLX_GRND_LAKE','FATES_DEMOTION_CARBONFLUX','FATES_EXCESS_RESP','FATES_MAINT_RESP_UNREDUCED','FATES_PRIMARY_PATCHFUSION_ERR','FATES_PROMOTION_CARBONFLUX','FATES_SEEDS_IN_LOCAL','FATES_UNGERM_SEED_BANK','HEAT_FROM_AC','HIA','HIA_R','HIA_U','HUMIDEX','HUMIDEX_R','HUMIDEX_U','LAKEICEFRAC_SURF','LAKEICETHICK','LNC','MORTALITY_CROWNAREA_CANOPY','MORTALITY_CROWNAREA_UNDERSTORY','QIRRIG_FROM_GW_CONFINED','QIRRIG_FROM_GW_UNCONFINED','QIRRIG_FROM_SURFACE','RSSHA','RSSUN','SWBGT','SWBGT_U','SWBGT_R','TBUILD','URBAN_AC','URBAN_HEAT','WASTEHEAT','WBT','WBT_R','WBT_U','FPG','FSH_R','F_DENIT','F_N2O_DENIT','F_N2O_NIT','F_NIT','GROSS_NMIN','HEAT_FROM_AC','HIA_R','HIA_U','HUMIDEX_R','HUMIDEX_U','LITTERC_HR','LIT_CEL_N','LIT_LIG_N','LIT_LIG_C','LIT_MET_C','LIT_MET_N','MORTALITY_CROWNAREA_CANOPY','MORTALITY_CROWNAREA_UNDERSTORY','NDEP_TO_SMINN','NET_NMIN','NFIX_TO_SMINN','POTENTIAL_IMMOB','POT_F_DENIT','POT_F_NIT','QIRRIG_FROM_GW_CONFINED','QIRRIG_FROM_GW_UNCONFINED','QIRRIG_FROM_SURFACE','SMINN_TO_PLANT','SMIN_NH4','SMIN_NO3','SMIN_NO3_LEACHED','SMIN_NO3_RUNOFF','SOM_ACT_C','SOM_ACT_N','SOM_C_LEACHED','SOM_PAS_C','SOM_PAS_N','SOM_SLO_C','SUPPLEMENT_TO_SMINN','SWBGT_R','SWBGT_U','TOTCOLC','TOTCOLN','TOTECOSYSC','TOTECOSYSN','TOTLITC','TOTLITC_1m','TOTLITN','TOTLITN_1m','TOTSOMC','TOTSOMN','TOT_WOODPRODC','TOT_WOODPRODC_LOSS','TOT_WOODPRODN','TOT_WOODPRODN_LOSS','WASTEHEAT','WBT','WBT_U','WBT_R','DWT_WOODPRODN_GAIN','VENTILATION','LIT_LIG_N_vr','LIT_LIG_N_vr','LIT_MET_N_vr','LIT_CEL_N_vr','SOILN_vr','SOM_ACT_N_vr','SOM_PAS_N_vr','SOM_SLO_N_vr','SMINN_vr','SMIN_NO3_vr','DWT_WOODPRODC_GAIN','EFLX_LH_TOT_R','LAISHA','LAISUN','SMINN','TOTSOMN_1m','SMIN_NH4_vr'
use_fates_luh = .false.
use_fates_nocomp = .true.
use_fates_fixed_biogeog = .true.
hist_fincl1 = 'FCO2'
finidat = '/cluster/shared/noresm/inputdata/share_kjetil/initial_files/i1850.ne30pg3_tn14.fatesnocomp.ctsm5.3.045_noresm_v9.CPLHIST_noLU_coldstart_v21_wFCO2.20250701.clm2.r.0101-01-01-00000.nc'

• user_nl_blom

ICFILE = "/cluster/shared/noresm/inputdata/restart/NOIIAJRARYF8485OC.TL319_tn14.3.0a03a.20250506/rest/1774-01-01-00000/NOIIAJRARYF8485OC.TL319_tn14.3.0a03a.20250506.blom.r.1774-01-01-00000.nc"

• user_nl_cice:

ice_ic = "/cluster/shared/noresm/inputdata/restart/NOIIAJRARYF8485OC.TL319_tn14.3.0a03a.20250506/rest/1774-01-01-00000/NOIIAJRARYF8485OC.TL319_tn14.3.0a03a.20250506.cice.r.1774-01-01-00000.nc"

• xmlchange commands

./xmlchange STOP_OPTION=nyears
./xmlchange STOP_N=5
./xmlchange REST_N=1
./xmlchange --subgroup case.run JOB_WALLCLOCK_TIME=48:00:00
./xmlchange --subgroup case.st_archive JOB_WALLCLOCK_TIME=01:00:00
./xmlchange --subgroup case.compress JOB_WALLCLOCK_TIME=06:00:00
./xmlchange RESUBMIT=9

---

Compset long name

1850_CAM70%LT%NORESM%CAMoslo_CLM60%FATES_CICE_BLOM%HYB%ECO_MOSART_DGLC%NOEVOLVE_SWAV_SESP

---

Model grid long name

a%ne30np4.pg3_l%ne30np4.pg3_oi%tnx1v4_r%r05_w%null_z%null_g%gris4d_m%tnx1v4

---

Start year:
1

---

End year:
50

---

Case directory:

• Locally on betzy (if still available):
  /cluster/projects/nn9560k/matsbn/NorESM/cases/n1850.ne30_tn14.noresm3_0_beta01.cam_energy_conserv.20250718

• On github:

---

Code version on github (either NorESMhub or user's fork):

• On github: https://github.com/NorESMhub/NorESM/releases/tag/noresm3_0_beta01

---

Diagnostics:

• https://ns2345k.web.sigma2.no/datalake/diagnostics/noresm/matsbn/n1850.ne30_tn14.noresm3_0_beta01.cam_energy_conserv.20250718/

---

Output:
/datalake/NS9560K/noresm3/cases/n1850.ne30_tn14.noresm3_0_beta01.cam_energy_conserv.20250718

---

Contacts:
Mats Bentsen

---

Extra details:

[adagj]

ADF diagnostics: https://ns2345k.web.sigma2.no/datalake/diagnostics/ADF/adagj/n1850.ne30_tn14.noresm3_0_beta01.cam_energy_conserv.20250718_21_50_vs_n1850.ne30_tn14.noresm3_0_beta01-noLU_650dcs_4p0clubbc8_0p5dust.20250708_21_50/website/index.html

ADF timeseries: https://ns2345k.web.sigma2.no/datalake/diagnostics/ADF/adagj/n1850.ne30_tn14.noresm3_0_beta01.cam_energy_conserv.20250718_1_50_vs_n1850.ne30_tn14.noresm3_0_beta01-noLU_650dcs_4p0clubbc8_0p5dust.20250708_1_50/website/index.html

[oyvindseland]

I noticed a small but significant decrease in aerosols. This is likely caused by an increased wet scavenging over the tropical oceans so both sea-salt and sulphate are impacted. The latter from increase in precipitation over outflow regions from some of the volcanoes.

[maritsandstad]

Land diagnostics:
https://ns9560k.web.sigma2.no/datalake/diagnostics/noresm/masan/n1850.ne30_tn14.noresm3_0_beta01.cam_energy_conserv.20250718/