ctsm5.4.007

[CTSM Gatekeeper]

*** RESPONSES TO THIS EMAIL WILL NOT BE READ ***
===============================================================
Tag name: ctsm5.4.007
Originator(s): samrabin (Sam Rabin, UCAR/TSS)
Date: Fri Jan 9 11:53:19 MST 2026
One-line Summary: Update (irrigated_)rice grnfill and lfemerg

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

This brings the parameter file in line with what I used for my AGU 2025 simulations.
- Increases grnfill from ~0.4 to 0.6.
- Increases lfemerg from ~0.01 to 0.05.

These changes should decrease rice yields.

Significant changes to scientifically-supported configurations
--------------------------------------------------------------

Does this tag change answers significantly for any of the following physics configurations?
(Details of any changes will be given in the "Answer changes" section below.)

[X] clm6_0

[ ] clm5_0

[ ] ctsm5_0-nwp

[ ] clm4_5


Notes of particular relevance for users
---------------------------------------

Changes made to namelist defaults (e.g., changed parameter values):
- New clm6_0 paramfile: ctsm60_params.c260108.nc


Testing summary:
----------------

regular tests (aux_clm: https://github.com/ESCOMP/CTSM/wiki/System-Testing-Guide#pre-merge-system-testing):

derecho ----- OK
izumi ------- OK


Answer changes
--------------

Summarize any changes to answers, i.e.,
- what code configurations: Clm60 compsets
- what platforms/compilers: All
- nature of change (roundoff; larger than roundoff/same climate; new climate): At least larger than roundoff

Other details
-------------

Pull Requests that document the changes:
- [ESCOMP/CTSM Pull Request #3686: ctsm5.4.007: Update (irrigated_)rice grnfill and lfemerg](https://github.com/ESCOMP/CTSM/pull/3686)

===============================================================
===============================================================