How to remove_namelist_changes?

[joakimkjellsson]

Hey ho

In the nemo.yaml we have something like this for FOCI-OpenIFS 3.0.1:

                    add_namelist_changes:
                                namelist_cfg:
                                        namdyn_ldf:
                                                # Increased viscosity
                                                # (old value of 6e11 was very low)
                                                rn_ahm_0_blp: -1.709e12
                                        namtra_ldf:
                                                # Reduce the effect of GM
                                                rn_aeiv_scale: 0.5

Now, I have one experiment where I'd like to un-do some of these namelist changes. So I found this in awiesm.yaml

remove_namelist_changes.namelist.recom.pavariables:
                            - constant_CO2

which I think instructs ESM-Tools to remove the namelist change for constant_CO2 in namelist.recom under chapter pavariables.

So I tried to mimick this in my own runscript:

nemo: 
   remove_namelist_changes.namelist_cfg.namtra_ldf:
      - rn_aeiv_scale

But this doesn't actually do anything. The rn_aeiv_scale value is still modified in the final namelist. I can see it under add_namelist_changes in the "finished" yaml file, but I can't see the remove_namelist_changes there.

Am I not doing the remove_namelist_changes correctly?

Best wishes
Joakim

[mandresm]

HI @joakimkjellsson,

Note that your namelist has an add_. I think adding the complete path to it should do:

nemo:
    remove_add_namelist_changes.namelist_cfg.namtra_ldf:
      - rn_aeiv_scale

If this does not work, and the add_namelist_changes is within a choose_ add also the choose, but I think that won;t be necessary.

If you still have the problem, I can have a look at it on Monday, just let me know

[joakimkjellsson]

Hi @mandresm. Thanks for the tip.

Unfortunately that did not solve the problem. To give the full details:
rn_aeiv_scale is not set in nemo.yaml but in focioifs.yaml we have (line 667 in https://github.com/esm-tools/esm_tools/blob/geomar_dev/configs/setups/focioifs/focioifs.yaml):

nemo:
        ....

        # See nemo.yaml for description of versions
        choose_general.version:
                ...
                
                "agrif-3.0":
                        version: "ORCA05_LIM2_KCM_AGRIF_OASISMCT4"
                        resolution: ORCA05
                        add_namelist_changes:
                                namelist_cfg:
                                        namdyn_ldf:
                                                rn_ahm_0_blp: -1.709e12
                                        namtra_ldf:
                                                rn_aeiv_scale: 0.5

I've tried adding the following to my runscript but nothing actually removes the rn_aeiv_scale from the namelist_cfg.
Attempt one in runscript:

nemo: 
   ...
   remove_namelist_changes.namelist_cfg.namtra_ldf:
         - rn_aeiv_scale

Attempt 2:

   nemo: 
      remove_add_namelist_changes.namelist_cfg.namtra_ldf:
         - rn_aeiv_scale 

Attempt 3:

nemo: 
   choose_general.version:
         "agrif-3.0":
             remove_add_namelist_changes.namelist_cfg.namtra_ldf:
                - rn_aeiv_scale

Attempt 4:

focioifs:
   model_dir: ${general.homedir}/esm/models/focioifs-agrif-3.0/
   nemo:
      choose_general.version:
         "agrif-3.0":
            remove_add_namelist_changes.namelist_cfg.namtra_ldf:
               - rn_aeiv_scale

I feel like I've tried every possible permutation with no luck.

It would be great if you could have a look. I feel like there must be a small mistake here somewhere.

Many thanks
Joakim

[mandresm]

One last try:

nemo:
    remove_choose_general.version.agrif-3.0.add_namelist_changes.namelist_cfg.namtra_ldf:
        - rn_aeiv_scale

That's what I meant above. If this doesn't work I'll look at it.

[joakimkjellsson]

Nope that didn't solve it either.
But if I add the "remove" under the focioifs block, i.e.:

focioifs:
   nemo:  
      remove_choose_general.version.agrif-3.0.add_namelist_changes.namelist_cfg.namtra_ldf:
         - rn_aeiv_scale

then at least it shows up in the *finished.yaml file:

general:
   ...
   nemo:
        remove_choose_general.version.agrif-3.0.add_namelist_changes.namelist_cfg.namtra_ldf:
        - rn_aeiv_scale

I still get the namelist change in my final namelist_cfg, so it doesn't work as expected, but at least I can see that ESM-Tools registers what I'm trying to do ;-)

I'm free for a zoom call before 13:30 if that helps.

Thanks!
/J

[mandresm]

A provisional solution that actually works:

   add_namelist_changes:
      namelist_cfg:
         namsbc_rnf:
            rn_rfact: 1.00
         namdyn_ldf:
            rn_ahm_0_blp: -1.709e12
         namtra_ldf:
            rn_aht_0: 600 
            rn_aeiv_scale: "remove_from_namelist"

I'll keep looking at why the other remove does not work

[joakimkjellsson]

Thanks a lot @mandresm! That did the trick for me!
/J

[mandresm]

Note for the ESM-Tools devs: the problem with remove is probably related with the case agrif-3.0 having a dot.

[chrisdane]

I have the same problem but neither of these 3 works:

configs/setups/awicm3/awicm3.yaml
# 1 
add_namelist_changes:
    fort.4:
        LTRCMFMG: ".false."
# 2
add_namelist_changes:
    fort.4:
        LTRCMFMG: "remove_from_namelist"
# 3
remove_namelist_changes.fort.4.NAMGFL:
    - LTRCMFMG

These are all in a setup and hence should overwrite the component default:

configs/components/oifs/oifs.yaml
...
    LTRCMFMG: ".true."

Note that for cases 2 and 3 the resulting runscripts log line

- NOTE: removing the variable: LTRCMFMG from the namelist: fort.4

is not displayed. But when I comment out the key in the component yaml, this line is displayed (in case 2, not in case 3), but still not updated in the final namelist (in neither case 2 nor 3). Case 1 however then works but thats not a solution since I do not want to remove the key from the component yaml.

Thanks for help: /home/a/a270073/esm/esm_tools