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ctsm5.4.027: Important final answer changes#3810

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ekluzek wants to merge 4 commits intoESCOMP:masterfrom
ekluzek:important_final_answer_changes
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ctsm5.4.027: Important final answer changes#3810
ekluzek wants to merge 4 commits intoESCOMP:masterfrom
ekluzek:important_final_answer_changes

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@ekluzek ekluzek commented Mar 12, 2026

Description of changes

Some important final answer changes needed for the coupled model and the offline spinup for the coupled model.

Update DATM to use: 1850 CMIP7 aerosols, CO2, and ndep

Have CTSM use ndep from DATM for 1850

For historical use CMIP6 aerosols and ndep (which means picking a SSP245) and CMIP7 CO2
(Will do a simulation to check the jump from going from 1850 to historical with CMIP aerosols: Keith, Sam L, or Will)

so update CDEPS tag for this.

CMIP7 Carbon isotopes, pop-dens (already in)

(Principle use CMIP7 for whatever can be, and CMIP6 for anything else)

Specific notes

Contributors other than yourself, if any: @slevis-lmwg

CTSM Issues Fixed (include github issue #):
Fixees #3799
Fixes #3137

Are answers expected to change (and if so in what way)? Yes!
coupled model and clm60cam7LndTuning mode tests change answers due to parameter file
CMIP7 CO2 is now being used

Any User Interface Changes (namelist or namelist defaults changes)?

Does this create a need to change or add documentation? Did you do so? No No

Testing performed, if any: Will do regular

@ekluzek ekluzek self-assigned this Mar 12, 2026
@ekluzek ekluzek added enhancement new capability or improved behavior of existing capability priority: high High priority to fix/merge soon, e.g., because it is a problem in important configurations science Enhancement to or bug impacting science usability Improve or clarify user-facing options PR status: needs testing non-bfb Changes answers (incl. adding tests) size: small labels Mar 12, 2026
@github-project-automation github-project-automation bot moved this to Ready to start (or start again) in CTSM: Upcoming tags Mar 12, 2026
@ekluzek ekluzek moved this from Ready to start (or start again) to In progress - master in CTSM: Upcoming tags Mar 12, 2026
@wwieder wwieder changed the title ctsm5.4.025: Important final answer changes ctsm5.4.026: Important final answer changes Mar 12, 2026
@ekluzek ekluzek changed the title ctsm5.4.026: Important final answer changes ctsm5.4.027: Important final answer changes Mar 12, 2026
@ekluzek ekluzek moved this from Todo to In Progress in LMWG: Sprint Planning Board Mar 13, 2026
Merge b4b-dev to master

Purpose and description of changes
----------------------------------

Merge b4b-dev to master:

Important things coming in:

 - mizuRoute! (NOTE: mizuRoute is a River model (ROF in the CESM context) that can be run in place of MOSART or RTM)
 - Documentation updates
 - Move a few namelist parameters to the parameter file
 - move of X components for nuopc
 - mksurfdata_esmf for Gnu compiler
 - scripts for CRUJRA forcing to handle Antarctica/Greenland
 - SpinupStablity script update to handle FATES and SE grids
 - Update cdeps for access to CMIP7 CO2
 - Tests for FATES Tree Recruitment Scheme (TRS)

Main grids to use with mizuRoute:

  Default mizuRoute grids will use the half degree land-only mizuRoute grid that is the same resolution as the MOSART grid.

  - 5x5_amazon_r05 - is the small Amazon region for testing
  - 5x5_amazon_rHDMA - is the small Amazon region using the HDMA for mizuRoute
  - nldas2_nldas2_rUSGS_mnldas2 - is the Continental US grid with USGS Geospatial Fabric
  - f09_f09_rHDMA_mg17 - is the 2 degree grid with the medium resolution HDMA grid
  - f09_f09_rHDMAlk_mg17 - is the 2 degree grid with the medium resolution HDMA grid that includes lakes
  - hcru_hcru_rMERIT_mt13 - is the half degree grid with the high resolution MERIT grid

Standard case to run with mizuRoute:

  grid=f09_f09_rHDMAlk_mg17 compset=I2000Clm60SpMizGs
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Labels

enhancement new capability or improved behavior of existing capability non-bfb Changes answers (incl. adding tests) PR status: needs testing priority: high High priority to fix/merge soon, e.g., because it is a problem in important configurations science Enhancement to or bug impacting science size: small usability Improve or clarify user-facing options

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Status: In progress - master
Status: In Progress

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Setup ndep, aerosols, and CO2 for CRUJRA -- the gap year between 2014-2023

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