nf2000_ne30pg3_ne30pg3_mtn14_20250120

[oyvindseland]

Purpose:
Test the impact of Fates climatology, circulation patterns and aerosol in an uncoupled version of NorESM2_5alph08d

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Description:
To get the code

git clone https://github.com/NorESMhub/NorESM.git
cd NorESM
git checkout noresm2_5_alpha08d
./bin/git-fleximod update

• 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

• create_newcase command

 ./create_newcase --case <user_case_path>/nf2000_ne30pg3_ne30pg3_mtn14_20250120\\
 --compset NF2000  \\
 --res  ne30pg3_ne30pg3_mtn14\\
 --project nn9560k --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'

• xmlchange commands

./xmlchange NTASKS=1920
./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

2000_CAM70%LT%NORESM%CAMoslo_CLM60%SP_CICE%PRES_DOCN%DOM_MOSART_DGLC%NOEVOLVE_SWAV_SESP

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Model grid long name
a%ne30np4.pg3_l%ne30np4.pg3_oi%ne30np4.pg3_r%r05_w%null_z%null_g%gris4_m%tnx1v4

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Case directory:

• Locally on betzy (if still available):
  /cluster/projects/nn9560k/oyvinds/NorESM2.5_alpha08/cases/nf2000_ne30pg3_ne30pg3_mtn14_20250120/

• On github:
  https://github.com/NorESMhub/noresm_simulations/tree/$CASE

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

• https://github.com/NorESMhub/NorESM/releases/tag/noresm2_5_alpha08d

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Diagnostics:

• Diags (if available):
  As examples:
• https://ns2345k.web.sigma2.no/datalake/diagnostics/ADF/plots/<$CASE_vs_$BASELINE>/website/index.html
• https://ns2345k.web.sigma2.no/datalake/diagnostics/ADF/plots/<$CASE_vs_$OBS>/website/index.html

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Output:

• Raw output on nird (if still available): /datalake/NS9560K/noresm3/cases/nf2000_ne30pg3_ne30pg3_mtn14_20250120
• CAM Climos:

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Contacts:

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Extra details:

[andrearosendahl]

AeroVal diagnostics: https://aeroval-test.met.no/andrear/pages/intercomp/?project=NorESM2.5&experiment=LatestNorESM2.5-vs-obs&station=ALL&observation=AeronetSun

[kjetilaas]

Thanks for doing these simulations, @oyvindseland!

I checked the setup in this and the companion simulations (and fixed the link to the case dir here).

When comparing these, I found a couple of things that could explain the differences between CLM6-SP and FATES-SP , as see AeroCal plots in previous comment:

• CLM starts from an initial file, while FATES is cold start
• Friction velocity parameter (zetamaxstable) is different (2.0 here and 0.5 in FATES-SP run)

I would guess these two alone could explain much of the dust differences. @rosiealice @DirkOlivie

[MichaelSchulzMETNO]

The initial conditions should not be important, Dust life time is 3 days. And there is no trend (eg accumulation) in dust load, I looked into it on aeroval.

[oyvindseland]

I strongly doubt that the initalisation is the reason.

The n1850 mineral dust and nf200 dust are very similar and the dust emissions are very stable over time
https://ns2345k.web.sigma2.no/datalake/diagnostics/ADF/plots/n1850.ne30_tn14.hybrid_fatessp.20241219_1_112_vs_n1850.ne30_tn14.hybrid_wavparam_fatessp.20241226_1_49/SFDUST_GlobalMean_ANN_TimeSeries_Mean.png

[kjetilaas]

Right! The land would have longer memory (soil moisture etc), but I agree that we should see this in the trend quite quickly. 👍

[rosiealice]

Interesting @kjetilaas! I could try changing the stability parameter and see the impact it has on the dust fluxes...