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1850 cesm3 aerosol monthly climatology - #455

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ekluzek wants to merge 12 commits into
ESCOMP:mainfrom
ekluzek:1850_cesm3_aero_cmip7_co2
Open

ekluzek wants to merge 12 commits into
ESCOMP:mainfrom
ekluzek:1850_cesm3_aero_cmip7_co2

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@ekluzek

@ekluzek ekluzek commented Oct 16, 2026

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Description of changes

Update the dataset to use for 1850 for cesm3 to a preliminary one.

Specific notes

Contributors other than yourself, if any:

CDEPS Issues Fixed (include github issue #):
Fixes #389

Are there dependencies on other component PRs (if so list):
No
But, will change answers for components that use DATM and need prescribed aerosols (MOM and CICE I beleive)

Are changes expected to change answers (bfb, different to roundoff, more substantial):
Different for anything with DATM_PRESAERO==clim_1850_cesm3
new CESM3 climate

Any User Interface Changes (namelist or namelist defaults changes):
No

Testing performed (e.g. aux_cdeps, CESM prealpha, etc):
So far ran this test:
SMS_Lm1.ne30pg3_t233.I1850Clm60BgcCropCrujraG.derecho_intel.clm-clm60cam7LndTuningMode
will run aux_clm and aux_cdeps

Hashes used for testing:
12efcbc
So far: ctsm5.4.063-2-g66f62810f
with: ccs_config_cesm1.0.92
cime6.5.20
cmeps1.1.71

@ekluzek ekluzek added enhancement New feature or request CESM Only Responsibility: CTSM Responsibility to manage and accomplish this issue is the CTSM Software group labels Oct 16, 2026
@ekluzek
ekluzek marked this pull request as draft October 16, 2026 23:34
@ekluzek
ekluzek marked this pull request as ready for review October 28, 2026 20:28
-->
<value compset="^1850_" >clim_1850_cmip6</value>
<!-- NorESM will use the CMIP7 dataset -->
<value compset="^1850_" cime_model="noresm">clim_1850_cmip7</value>

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@mvertens and @mvdebolskiy I made this change here for noresm, which should do the right thing for you. If you aren't ready for that I can back it out though. I can't test it though, so no guarentee it works. But, it's only one and it looks right to me.

@ekluzek
ekluzek requested review from Katetc, billsacks and slevis-lmwg and removed request for billsacks October 28, 2026 20:32
@ekluzek

ekluzek commented Oct 28, 2026

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@billsacks @slevis-lmwg and @Katetc this is ready to review now. I'm sending testing for it, and will report back on what I find there. Please review and let me know if there's anything to address.

@billsacks
billsacks requested a review from mvertens October 28, 2026 20:44

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I'm approving but also adding @mvertens as a reviewer since it looks like this could potentially impact NorESM?

@mvertens mvertens left a comment

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Can we please add a model=cesm attribute for this - since this is now available in the latest version of noresm.

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CESM Only enhancement New feature or request Responsibility: CTSM Responsibility to manage and accomplish this issue is the CTSM Software group

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Status: Done

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Successfully merging this pull request may close these issues.

Add in new option for CMIP7 1850 aerosols

3 participants