ESCOMP/CTSM

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Community Terrestrial Systems Model (includes the Community Land Model of CESM)

Stars: 352
Forks: 361
Open beginner issues: 0
Indexed issues: 953
Avg merge: 9d 19h
Merged PRs (30d): 8

Dominant language: Fortran
License: No license data
Last GitHub push: Sep 10, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Open All

944 open issues indexed

(CLM-only) Add a pftdyn test with constant pft's to give same answers as constant pft case Open

priority: low testing

ESCOMP/CTSM#184 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Remove duplicate calculations of ice impedance Open

code health

ESCOMP/CTSM#194 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Revise treatment of sub-grid hydrological fractional areas Open

enhancement

ESCOMP/CTSM#197 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement alternative numerical solutions for the ponded water store Open

enhancement

ESCOMP/CTSM#198 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add more rigorous balance checks for energy Open

enhancement

ESCOMP/CTSM#202 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Fix handling of bare land fluxes in lnd2glcMod Open

bug priority: high science

ESCOMP/CTSM#204 · 12 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
CN annsum_counter can trigger mid-year, and at different times for different columns Open

bug

ESCOMP/CTSM#205 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Make logic in CropIncrementYear more robust Open

enhancement

ESCOMP/CTSM#208 · 5 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Add logic to reset flags for a crop column that just became inactive Open

bug

ESCOMP/CTSM#209 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Can't handle interpolating from a fates restart file because of the cohort dimension Open

enhancement FATES test: fates

ESCOMP/CTSM#211 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Exit gracefully when using a non-fates restart file to interpolate to a simulation with fates Open

bug

ESCOMP/CTSM#212 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Improve performance of soil temperature Open

investigation performance

ESCOMP/CTSM#223 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Assess impact of single vs. double precision on performance Open

investigation performance priority: low

ESCOMP/CTSM#224 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Limit where dynamic crops and transient PFTs are allowed Open

enhancement performance

ESCOMP/CTSM#229 · 22 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Dynamic landunits carbon and nitrogen conservation: Determine value contributed by special landunits Open

enhancement

ESCOMP/CTSM#230 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add a system test to catch breakages in carbon isotopes Open

testing

ESCOMP/CTSM#231 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Do a more detailed performance assessment to identify hotspots Open

investigation performance

ESCOMP/CTSM#232 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Assess potential for compiler flag optimization Open

investigation performance

ESCOMP/CTSM#233 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Improve performance of CNZero Open

enhancement performance

ESCOMP/CTSM#234 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Change pointer-based arrays to allocatable arrays where possible Open

enhancement size: large

ESCOMP/CTSM#235 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Our use of filters in CTSM degrades performance and doesn't allow any loops that use them to vectorize Open

investigation performance

ESCOMP/CTSM#236 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Winter wheat Open

enhancement science

ESCOMP/CTSM#264 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Ozone cleanup Open

enhancement

ESCOMP/CTSM#267 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Figure out how to divide winter and spring wheat Open

enhancement science

ESCOMP/CTSM#269 · 20 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Receive ozone from atmosphere Open

enhancement PR status: awaiting review PR status: ready

ESCOMP/CTSM#270 · 30 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Use 10-m wind for snow parameterizations Open

enhancement

ESCOMP/CTSM#273 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Rework CLM test suite: miscellaneous things to do to shorten turnaround time and increase coverage Open

performance testing

ESCOMP/CTSM#275 · 26 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Test suite redesign: consider having a subset of the test suite for baseline comparisons Open

testing

ESCOMP/CTSM#277 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Set up a CI server to run the "short" test list Open

devops testing

ESCOMP/CTSM#278 · 9 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Clean up fertilization logic Open

code health

ESCOMP/CTSM#280 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add structure(s) to iterate over all state variables Open

code health priority: low size: large

ESCOMP/CTSM#282 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Major cleanup of snow code Open

code health

ESCOMP/CTSM#287 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Clean up use_bedrock implementation Open

code health

ESCOMP/CTSM#289 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
flexibleCN and luna code cleanup Open

code health

ESCOMP/CTSM#290 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Add an untested_use_anyway namelist option Open

enhancement

ESCOMP/CTSM#291 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Create tool that updates comments in associate statements Open

enhancement

ESCOMP/CTSM#292 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Rework threading to be done at a higher level, simplifying array argument passing Open

code health size: large

ESCOMP/CTSM#293 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Address large number of iterations done for canopy fluxes Open

investigation performance priority: low

ESCOMP/CTSM#299 · 54 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
Avoid doing dyn_subgrid calculations if there were no changes in subgrid areas and/or only allow dynamic landcover on year boundaries Open

enhancement performance

ESCOMP/CTSM#300 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Examine performance of loops over soil layers Open

investigation performance

ESCOMP/CTSM#324 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support multiple soil water retention curve methods Open

enhancement

ESCOMP/CTSM#335 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Move old confluence wiki pages to this github wiki Open

docs-loc:other docs:new documentation

ESCOMP/CTSM#336 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Modularize base flow Open

enhancement

ESCOMP/CTSM#361 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Check the pause alarm Open

enhancement priority: low

ESCOMP/CTSM#378 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
History fields incorrect when set_xxx=0 but the xxx landunit is also set in initCold Open

bug science

ESCOMP/CTSM#431 · 14 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
leafcn_max < target leafcn? parameter file leafcn_min and leafcn_max are on parameter files, but NOT used in the code, they are hardcoded to -10 and +15 Open

bug code health usability

ESCOMP/CTSM#440 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Fates testmod on fates_next_api is setting a coldstart, but we also have FatesCold Open

FATES API update testing

ESCOMP/CTSM#446 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Duplicate definitions of SMP (smp_l) Open

bug priority: low science

ESCOMP/CTSM#447 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Allow namelist defaults to apply for phys versions greater than or less than a given version Open

blocked: dependency enhancement

ESCOMP/CTSM#454 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
gsmap global sizes different Open

bug

ESCOMP/CTSM#473 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

ESCOMP/CTSM

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