add new noresm cime model by mvertens · Pull Request #5057 · ESMCI/cime

mvertens · 2026-09-15T11:24:57Z

Description

NorESM and CESM share the same git-fleximod layout, so a NorESM checkout was previously detected as cesm. This PR adds noresm as a model in its own right. This PR should have no impact on E3SM CIME functionality.

new file CIME/data/config/noresm/config_files.xml — this new file is based on the cesm file, with MODEL set to noresm, components NorESM does not use removed.
get_model() now reads a new file - $SRCROOT/.cime_model_id if it is present.
- If the string inside this file is noresm - then the noresm model is used.
- This takes precedence over CIME_MODEL; a conflicting value is warned about.
- Note that the accepted values for the string are the names of the files in cime/CIME/data/config (currently cesm, e3sm, noresm and ufs)
a new variable CESM_LIKE_MODELS collects the places where CIME branches on the model name and noresm must behave as cesm: shared library list, unsupported compset check, describe_version tag lookup, case cloning, build provenance.
Backwards compatible. Nothing is modified without the presence of the .cime_model_id file, which lives in the NorESM repo.

A few other changes:

git@ (ssh) ==> https: for the cprnc submodule (universal access to CIME)
Fix typo in Makefile (CESM/NorESM specific)
shebang fix in find_circular_dependencies.py (necessary in modern environments, e.g., conda) (CESM/NorESM specific)
Taking out the "mira" special case (I don't think this machine exists)

Testing: verified that this change is completel backwards compatible with noresm checkouts

Checklist

My code follows the style guidelines of this project (black formatting)
I have performed a self-review of my own code
My changes generate no new warnings
I have tested that exercise my feature/fix and existing tests continue to pass
I have commented my code, particularly in hard-to-understand areas
I have made corresponding additions and changes to the documentation

update NorESMhub CIME to and ESMCI cime6.0.173 The only difference between NorESMhub CIME in this PR and and ESMCI cime6.0.173 is the addition of blom in CIME/data/config/cesm/config_files.xml Test suite: Ran SMS_D_Ld1.T62_tn14.NOINYOC.betzy_intel and verified that it was bfb. Test baseline: Test namelist changes: Test status: bfb User interface changes?: None Update gh-pages html (Y/N)?: No

cime6.0.184

update noresm to cime6.0.184

cime6.0.218

cime6.0.222

update to cime6.0.222

merge to cime6.0.232 This PR merges the NorESMHub cime fork to cime6.0.232 and is needed to have the new dglc component be able to be run out of system tests. Test suite: Testing was done on derecho - see ESCOMP/CDEPS#268 Fixes: None User interface changes?: None Update gh-pages html (Y/N)?: N

Update to cime6.0.250 Remove ssh dependence in .gitmodules file

cime6.1.28

update to cime6.1.28 Needed to update share (i.e. nuopc_shr_methods.F90) which in turn in needed to update CMEPS. Testing: Verified that SMS_D_Ln9.ne30pg3_ne30pg3_mtn14.NF2000.betzy_intel.cam-outfrq9s is bfb with noresm2_5_013_cam6_3_158. Test status: bit for bit User interface changes?: No Update gh-pages html ?: No

cime6.1.38

Update CIME to ESMCI/cime6.1.38 Add in one bug fix from cime6.1.44 GitHub PR link: NorESMhub#93 Test suite: noresm prealpha Test baseline: NA Test namelist changes: NA Test status: BFB

Rpointers update cime

Update mkDepends and Makefile to be able to handle Fortran submodules - These files are identical to the ones in ESMCI/master. - CAM has started using Fortran submodules (a Fortran 2008 feature). - Updated Makefile also contains capability of building FTorch library Test suite: aux_cam_noresm Test baseline: NA Test namelist changes: NA Test status: bit for bit User interface changes?: NA Update gh-pages html (Y/N)?: N

cime6.1.142

cime6.1.142_noresm_v1: update to ESMCI cime6.1.142

updated to cime6.1.143

Co-authored-by: goldy <1588651+gold2718@users.noreply.github.com>

Update to ESMCI/cime-6.1.173 - Fix check_input_data (from ESMCI update) - Fix issues with resubmit on Olivia and Betzy

…_to_config_files addition of ww3 to entries where it was missing

- Fix spelling of FORTRAN - Fix python path in script

- Fix spelling of FORTRAN in CIME/Tools/Makefile - Fix python path in find_circular_dependency.py script

cime6.5.12 # Conflicts: # CIME/non_py/cprnc

merge noresm to cime6.5.12

add noresm model as an option to CIME

billsacks

This is great! I really like this approach - both the CESM_LIKE_MODELS and the check for a model id file at the top level. Thanks a lot for doing this, @mvertens - this is going to really help with coordination of CMEPS, CDEPS and other repositories between NorESM and CESM!

I have one request for a fix to the doctest. (Sorry that I missed this in my review on NorESMhub.) Other than that, this looks great.

billsacks · 2026-09-15T14:10:23Z

    >>> get_model()
    'e3sm'
    >>> reset_cime_config()
+    >>> del os.environ["SRCROOT"]


It seems like, instead of deleting the SRCROOT environment variable, this doctest should save any pre-existing SRCROOT environment variable and then, if it existed previously, reset it to the original rather than deleting it.

@billsacks - thanks for catching this. I have fixed this problem.

billsacks · 2026-09-15T14:19:14Z

@jasonb5 and @jgfouca - There are a couple of design points here that I discussed with @mvertens and am satisfied with myself, but would be happy for your input on:

(1) The new $SRCROOT/.cime_model_id file takes precedence over everything else. This felt like the right approach to me, but can you see any problems with this?

(2) Do we still have tests that use a standalone cime, outside of any model? If so, can you see any problems with this check for .cime_model_id for standalone cime usages? I couldn't see any, but wanted to run this by you.

jgfouca · 2026-09-15T15:52:21Z

@billsacks , I'm ok with .cime_model_id.

Copilot

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billsacks

Looks good now - thank you!

mvertens · 2026-09-15T16:27:20Z

@jgfouca @billsacks - thanks for your reviews. Is it okay to merge this? Who normally does this?

mvertens and others added 30 commits October 16, 2023 09:16

Merge remote-tracking branch 'esmci/master' into feature/update_to_esmci

6b97472

Merge tag 'cime6.0.184' into noresm

4bb2cf3

cime6.0.184

Merge pull request ESMCI#54 from mvertens/feature/update_to_cime6.0.184

cd2dc67

update noresm to cime6.0.184

Merge tag 'cime6.0.218' into HEAD

10753b8

cime6.0.218

Merge tag 'cime6.0.222' into feature/update_to_cime6.0.222

b2bc6f5

cime6.0.222

Merge pull request ESMCI#70 from mvertens/feature/update_to_cime6.0.222

26ebfbd

update to cime6.0.222

made the cime cprnc submodule use https rather than ssh

efee4eb

fix cprnc to use https

f9b3d55

updates to fix conflict

54e2a31

Merge pull request ESMCI#77 from mvertens/feature/fix_cprnc

dff006e

Update to cime6.0.250 Remove ssh dependence in .gitmodules file

Merge tag 'cime6.1.28' into HEAD

bf32cb9

cime6.1.28

Merge tag 'cime6.1.38' into feature/update_cime

2e6a89a

cime6.1.38

Import same file error fix from cime6.1.44

fc7c8fd

Merge pull request ESMCI#93 from gold2718/update_to_cime6.1.38

8d3198c

Update CIME to ESMCI/cime6.1.38 Add in one bug fix from cime6.1.44 GitHub PR link: NorESMhub#93 Test suite: noresm prealpha Test baseline: NA Test namelist changes: NA Test status: BFB

Merge remote-tracking branch 'esmci/master' into rpointers-update-cime

dd1b016

Merge pull request ESMCI#97 from mvdebolskiy/rpointers-update-cime

3012a95

Rpointers update cime

Update Makefile and mkDepends

3293031

Merge tag 'cime6.1.142' into HEAD

fe930a0

cime6.1.142

Merge pull request ESMCI#101 from mvertens/feature/update_to_cime6.1.143

9388602

cime6.1.142_noresm_v1: update to ESMCI cime6.1.142

updated gitignore.template

35434eb

fix cprnc submodule

855d104

Merge pull request ESMCI#102 from mvertens/feature/update_to_cime6.1.143

ab73a7e

updated to cime6.1.143

Merge remote-tracking branch 'upstream/master' into updt-to173

b1a1c15

fix mf partition memery bs in most dirty way

05ee216

Update CIME/case/case_st_archive.py

06dc97a

Co-authored-by: goldy <1588651+gold2718@users.noreply.github.com>

add compiler attribute for olivia gnu to work on <= 4 nodes

e3fb594

mvdebolskiy and others added 16 commits April 21, 2026 19:20

add betzy to st_archive exception

1d04669

Merge pull request ESMCI#110 from mvdebolskiy/updt-to173

a34f357

Update to ESMCI/cime-6.1.173 - Fix check_input_data (from ESMCI update) - Fix issues with resubmit on Olivia and Betzy

addition of ww3 to entries where it was missing

0174e8c

Merge pull request ESMCI#114 from mvertens/feature/add_additional_ww3…

f6bf4f8

…_to_config_files addition of ww3 to entries where it was missing

Fix typos

c73e1e8

- Fix spelling of FORTRAN - Fix python path in script

Merge pull request ESMCI#115 from gold2718/fix_typo

47494e1

- Fix spelling of FORTRAN in CIME/Tools/Makefile - Fix python path in find_circular_dependency.py script

Merge tag 'cime6.5.12' into feature/merge_to_cime6.5.12

cee2e8e

cime6.5.12 # Conflicts: # CIME/non_py/cprnc

updated to master

a9464bb

Merge pull request ESMCI#119 from mvertens/feature/merge_to_cime6.5.12

f2336b2

merge noresm to cime6.5.12

add noresm as a cime model

16f926c

removed non-noresm components

e130bd7

give .cime_model_id precedence over CIME_MODEL

24fb698

udpated documentation

40e1c74

addressed issues raised in PR review

2371057

Merge pull request ESMCI#120 from mvertens/feature/add_noresm_cime_model

c7e14d4

add noresm model as an option to CIME

undid addition of betzy and olivia for PR back to ESMCI

665b52f

mvertens requested review from billsacks, jasonb5 and jgfouca September 15, 2026 11:25

billsacks requested changes Sep 15, 2026

View reviewed changes

billsacks mentioned this pull request Sep 15, 2026

Environment variables created by/for CIME should be prefixed with CIME #5058

Open

fixed doctest issue raised in PR review

5f9d79e

jgfouca approved these changes Sep 15, 2026

View reviewed changes

jgfouca requested a balanced review from Copilot September 15, 2026 15:51

Copilot AI reviewed Sep 15, 2026

billsacks approved these changes Sep 15, 2026

View reviewed changes

jgfouca merged commit 1dddaa7 into ESMCI:master Sep 15, 2026
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add new noresm cime model - #5057

add new noresm cime model#5057
jgfouca merged 48 commits into
ESMCI:masterfrom
mvertens:feature/add_new_cime_model

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