E3SM-Project/E3SM

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Energy Exascale Earth System Model source code. NOTE: use "maint" branches for your work. Head of master is not validated.

Stars: 440
Forks: 481
Open beginner issues: 0
Indexed issues: 570
Avg merge: 3d 22h
Merged PRs (30d): 35

Dominant language: Fortran
License: No license data
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Open All

570 open issues indexed

Tabs should be eliminated from source files. Open

enhancement help wanted

E3SM-Project/E3SM#132 · 8 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Incorrect logic in CLM for sub-dividing bottom snow layer Open

bug confirmed ELM

E3SM-Project/E3SM#248 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Chemistry pre-processor in CAM does not compile with NAG compiler Open

Atmosphere

E3SM-Project/E3SM#262 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
PIO doesn't build with NAG on next Open

bug Utils

E3SM-Project/E3SM#448 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
user should not be allowed to set dtime in user_nl_cam Open

Atmosphere bug

E3SM-Project/E3SM#509 · 9 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Incorrect N/P uptake and phosphatase activity Open

bug ELM

E3SM-Project/E3SM#571 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
N/P limitation factors incorrect in CTC Open

bug ELM

E3SM-Project/E3SM#572 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
plant demand under negative soil solution N/P concentrations Open

bug ELM

E3SM-Project/E3SM#573 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
SOM decomposition N/P imbalance Open

bug ELM

E3SM-Project/E3SM#574 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Chemistry preprocessor "He molecular weight" bug Open

Atmosphere bug

E3SM-Project/E3SM#690 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Chemistry pre-processor doesn't compile out-of-the-box for intel compiler on Edison and Constace Open

Atmosphere

E3SM-Project/E3SM#755 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Modify code so as to get rid of hardwired molecular weights in modal_aero_data.F90 Open

Atmosphere enhancement

E3SM-Project/E3SM#812 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Is threading broken for CLUBB? Open

Atmosphere question

E3SM-Project/E3SM#819 · 20 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Array out of bound error in PET_PT_Ln9.ne30_ne30.FC5 Open

Atmosphere bug

E3SM-Project/E3SM#850 · 8 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
update mechanism for turning on bc deposition in snow feature in compsets Open

Atmosphere compset

E3SM-Project/E3SM#858 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
clean up atmosphere compset definitions Open

Atmosphere BFB compset

E3SM-Project/E3SM#859 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
PFT distribution has straight lines across Australia and Africa Open

ELM

E3SM-Project/E3SM#900 · 11 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
ALM doesn't stop when energy balance is violated Open

ELM

E3SM-Project/E3SM#913 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Hardwired sol_factic_interstitial namelist parameter Open

Atmosphere

E3SM-Project/E3SM#942 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
ALM fails for I1850CRUCLM45BGC with Phosphorus model on Open

ELM

E3SM-Project/E3SM#974 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Remove flags for hiding bugs to maintain BFB reproducability in PR #1147 Open

Atmosphere

E3SM-Project/E3SM#1148 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
namelist file is read by multiple processors in solar_data.F90 Open

Atmosphere bug

E3SM-Project/E3SM#1161 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Make sure that PIO2 captures all necessary timing information Open

enhancement

E3SM-Project/E3SM#1170 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
MPAS-Seaice output for air stress is all zeros Open

MPAS-seaice

E3SM-Project/E3SM#1235 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
ALM crashing with "Forcing height is below canopy height for pft index" Open

bug ELM

E3SM-Project/E3SM#1259 · 7 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
When coupler bypass is used lot of output is written in acme.log Open

ELM

E3SM-Project/E3SM#1284 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
extremely long restart file write times for CAM on grizzly and wolf Open

Coupled Model PIO

E3SM-Project/E3SM#1293 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Add support for IM+CRU+SP compsets Open

ELM

E3SM-Project/E3SM#1320 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
get_proc_bounds called from threaded region Open

ELM

E3SM-Project/E3SM#1369 · 14 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
MPAS i/o unit numbers could conflict with ACME's Open

MPAS-albany-landice MPAS-ocean MPAS-seaice PotentialBug

E3SM-Project/E3SM#1441 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Coupler water flux diagnostic missing sea ice melt/growth Open

bug Coupler

E3SM-Project/E3SM#1463 · 14 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Replace reference to ED with FATES in ALM code Open

ELM enhancement

E3SM-Project/E3SM#1541 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Failure writing high-res CAM restart file on titan Open

Atmosphere Coupled Model PIO Titan

E3SM-Project/E3SM#1544 · 11 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
High res simulations + CPL + PnetCDF fails Open

PIO

E3SM-Project/E3SM#1623 · 7 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Rename variables in ALM incorrectly associated with nutrients leaching Open

ELM enhancement

E3SM-Project/E3SM#1631 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Scripts not picking up umask on anvil Open

Anvil bug CIME Scripts

E3SM-Project/E3SM#1646 · 20 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
"No space left on device" error on Cascade machine (PNNL cluster) Open

bug PIO

E3SM-Project/E3SM#1687 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Error trying to archive MPAS interim restart files. Open

bug CIME

E3SM-Project/E3SM#1695 · 15 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Negative values in cam_in%cflx for O3, H2O2, H2SO4, and SO2 Open

Atmosphere PotentialBug

E3SM-Project/E3SM#1712 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Relying on compilers to deallocate variables Open

Atmosphere

E3SM-Project/E3SM#1715 · 5 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Uninitialized array in gravity wave front calc Open

Atmosphere bug

E3SM-Project/E3SM#1737 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
null domain and null filepath after create_newcase script Open

CIME ELM PotentialBug

E3SM-Project/E3SM#1754 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Nutrient-enabled ALM-FATES (planning) Open

ELM enhancement FATES

E3SM-Project/E3SM#1773 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
_MPISERIAL support in PIO1 may be broken? Open

bug CIME PIO PotentialBug

E3SM-Project/E3SM#1780 · 10 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Compilation fail with prescribed aerosol model Open

Atmosphere bug

E3SM-Project/E3SM#1795 · 10 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Add support for adding -DCPL_BYPASS to CPPDEFS Open

ELM enhancement

E3SM-Project/E3SM#1805 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Fortran runtime error in subroutine cam_pio_get_var_3d_r8_perm Open

bug

E3SM-Project/E3SM#1820 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
ERROR: pprodharv10 outside of range for customized parameter file. Open

bug ELM

E3SM-Project/E3SM#1920 · 9 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
MPAS ezxml issues when building with address sanitizer options Open

MPAS-ocean

E3SM-Project/E3SM#1973 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Potential memory leaks in CAM Open

E3SM-Project/E3SM#1990 · 7 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026

E3SM-Project/E3SM

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