n1850.ne30_tn14.hybrid_fatessp.202401031

[mvertens]

Purpose:
Duplicate of n1850.ne30_tn14.hybrid_fatessp.20241007 but with a fix for DMS in CAM. The goal is to run 20 years.

---

Description:

• fix for DMS being set to zero inside CAM despite non-zero values coming from the ocean (see fix problem with setting cam_in%cflx for dms in cap CAM#174)
• use of FATES-SP and spun up initial conditions for FATES-SP using offline spinup
• NOTE: a memory leak is present in the run and hits agains the node limit when running past 11 years.
  See memory leak in n1850 case NorESM#550

---

Description:

• create_newcase commnad

 ./create_newcase --case <user_case_path>/n1850.ne30_tn14.hybrid_fatessp.202401031 \\
 --compset 1850_CAM%DEV%LT%NORESM%CAMoslo_CLM60%FATES-SP_CICE_BLOM%ECO_MOSART_DGLC%NOEVOLVE_SWAV_SESP  \\
 --res ne30pg3_tn14 \\
 --project nn9039k --run-unsupported --mach betzy 

• user_nl_cam

 use_aerocom = .true.
 interpolate_nlat   = 192
 interpolate_nlon   = 288
 interpolate_output = .true.
 history_aerosol = .true. 
 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
 bndtvg = '/cluster/shared/noresm/inputdata/atm/cam/ggas/noaamisc.r8.nc'

• user_nl_blom
  ICFILE = "/cluster/shared/noresm/inputdata/restart/NOIIAJRAOC20TR_TL319_tn14_ppm_20240816/rest/1775-01-01-00000/NOIIAJRAOC20TR_TL319_tn14_ppm_20240816.blom.r.1775-01-01-00000.nc"

• user_nl_cice
  ice_ic = "/cluster/shared/noresm/inputdata/restart/NOIIAJRAOC20TR_TL319_tn14_ppm_20240816/rest/1775-01-01-00000/NOIIAJRAOC20TR_TL319_tn14_ppm_20240816.cice.r.1775-01-01-00000.nc"

• user_nl_clm
  Add the following to user_nl_clm

z0param_method='ZengWang2007'

• xmlchange commands

./xmlchange NTASKS=1920
./xmlchange NTASKS_OCN=256
./xmlchange ROOTPE=0
./xmlchange ROOTPE_OCN=1920
./xmlchange BLOM_VCOORD=cntiso_hybrid,BLOM_TURBULENT_CLOSURE=
./xmlchange STOP_OPTION=nyears
./xmlchange STOP_N=7
./xmlchange REST_N=1
./xmlchange REST_OPTION=nyears
./xmlchange RESUBMIT=3
./xmlchange --subgroup case.run JOB_WALLCLOCK_TIME=48:00:00
./xmlchange --subgroup case.st_archive JOB_WALLCLOCK_TIME=03:00:00

---

Compset long name
1850_CAM%DEV%LT%NORESM%CAMoslo_CLM60%FATES-SP_CICE_BLOM%ECO_MOSART_DGLC%NOEVOLVE_SWAV_SESP

---

Model grid long name
a%ne30np4.pg3_l%ne30pg4.pg3_oi%tnx1v4_r%r05_w%null_z%null_g%gris4_m%tnx1v4

---

Case directory:

• Locally on betzy:
  <user_pathname>/n1850.ne30_tn14.hybrid_fatessp.202401031
• On github:

---

Code version on github:

• https://github.com/NorESMhub/NorESM/releases/tag/noresm2_5_alpha07
• CAM needs to be updated - modify Externals.cfg to have the following change:

[cam]
protocol = git
tag = noresm2_5_015_cam6_3_158.  
repo_url = https://github.com/NorESMhub/CAM
local_path = components/cam
externals = Externals_CAM.cfg
required = True

---

Diagnostics:

• Atmosphere:
  Compared to NorESM2-MM: https://ns2345k.web.sigma2.no/datalake/diagnostics/ADF/plots/n1850.ne30_tn14.hybrid_fatessp.202401031_10_20_vs_N1850frc2_f09_tn14_20191001_1209_1219/website/index.html

Compared to n1850.ne30_tn14.hybrid_fatessp.202401007:

• Ocean / sea ice / hamocc: https://ns2345k.web.sigma2.no/datalake/diagnostics/noresm/adagj/n1850.ne30_tn14.hybrid_fatessp.202401031/

---

Output:

• Raw output: /nird/datalake/NS9560K/noresm3/cases/n1850.ne30_tn14.hybrid_fatessp.20241031

---

Contacts:
@mvertens, @monsieuralok

---

Extra details:

[mvertens]

@monsieuralok - please use ./xmlchange --append CLM_BLDNML_OPTS="-ignore_warnings" and the finidat used above.

[mvertens]

@monsieuralok - please don't start yet - it turns out that finidat is being set to ' '

[mvertens]

@monsieuralok - so there is a problem with how finidat can be set for a startup run with FATES. At this point since we are using FATES-SP - please go ahead and let finidat = ' ' and simply do a 20 year run with that setting. I've modified the directions to reflect that. Sorry for all of the confusion.

[monsieuralok]

@mvertens if we change file components/clm/bld/namelist_files/namelist_defaults_overall.xml and comment line
<clm_start_type use_fates=".true.">cold</clm_start_type>

which sets startup type to COLD in case of FATE then we will able to set finidat. That I have tested.

[mvertens]

@monsieuralok - that is right - but after a long discussion today with the CICERO group, we don't want to do that. I've put in a place a temporary fix in CLMBuildNamelist.pm with the following change

    # start of hack
    # THIS is a temporary hack to enable fates to use finidat values for startup runs
    my $is_fates = $nl_flags->{'use_fates'};
    if (defined $finidat && not $is_fates) {
    # end of hack

and this permits you to keep the the default vallue of clm_start_type for fates to cold. They key issue is that there was no way to set finidat for a startup run with fates. So this temporary hack will fix that. And in the meantime, @rosiealice will talk in more depth with the FATES developers to determine a more sustainable way forwards. In addition, the file that finidat pointed to before is not compatible with ctsm5.3 - so @maritsandstad needs to create another spinup. So for now just having findiat=' ' in this simulation is fine.