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E3SM-Project

36 indexed repositories · View on GitHub

E3SM
Energy Exascale Earth System Model source code. NOTE: use "maint" branches for your work. Head of master is not validated.

Fortran · 441 stars
scream
Fork of E3SM used to develop exascale global atmosphere model written in C++ (aka SCREAM)

79 stars
e3sm_diags
E3SM Diagnostics package

Jupyter Notebook · 50 stars
EKAT
Tools and libraries for writing Kokkos-enabled HPC C++ in E3SM ecosystem

C++ · 22 stars
scorpio
A high-level Parallel I/O Library for structured grid applications

C++ · 22 stars
iESM
The Integrated Earth System Model (iESM) couples GCAM (http://www.globalchange.umd.edu/gcam/) to the Community Earth System Model

Fortran · 16 stars
scmlib
Library of cases for the Single Column Model

Shell · 13 stars
HOMMEXX
Clone of ACME for CMDV-SE project to convert HOMME to C++

Fortran · 11 stars
ACME-ECP
E3SM MMF for DoE ECP project

Fortran · 11 stars
zstash
Long term HPSS archiving tool for E3SM

Python · 11 stars
polaris
Testing and analysis for OMEGA, MPAS-Ocean, MALI and MPAS-Seaice

Python · 10 stars
e3sm-unified
A metapackage for a unified anaconda environment for analyzing results from the Energy Exascale Earth System Model (E3SM).

Python · 8 stars
zppy
E3SM post-processing toolchain

Python · 8 stars
e3sm_to_cmip
Tools to CMORize E3SM output

Python · 7 stars
Ocean-BGC
This repository will house the columnized ocean BGC modules

Fortran · 6 stars
codesign-kernels
Climate kernels shared with interested parties for co-design

Fortran · 4 stars
PAM

Roff · 4 stars
COMPOSE
Compact Multi-moment Performance-Portable Semi-Lagrangian methods for non-hydrostatic dynamics

C++ · 4 stars
containers
Container recipes for the E3SM project

Dockerfile · 4 stars
pace
Performance Analytics for Computational Experiments

Python · 3 stars
16 more repositories live on View on GitHub

Beginner friendly Everything

Open All

Failed to allocate file: Bad file descriptor on frontier with DEBUG ne256 case Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

E3SM-Project/E3SM#8659 · 1 comment · Opened Aug 22, 2026
driver-mct: lnd->glc elevation-class downscaling demotes fields to single precision Open

MPAS-albany-landice PotentialBug

Difficulty 2/5 1-3 hours Newbie friendliness 67/100

E3SM-Project/E3SM#8657 · 11 comments · Opened Aug 21, 2026
[Docs]: Naming Environment Variables Open

type: doc

Difficulty 5/5 Over a week Newbie friendliness 25/100

E3SM-Project/simboard#298 · Opened Aug 20, 2026
[Feature]: allow user to specify slurm --mail-user and --mail-type values in config file Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

E3SM-Project/zppy#858 · Opened Aug 18, 2026
[Doc]: Consider dropping multiversion Open

Documentation

Difficulty 5/5 Over a week Newbie friendliness 30/100

E3SM-Project/zppy#857 · Opened Aug 18, 2026
tc_analysis: grids other than ne30/ne120 (e.g. ne256pg2) fail on the hard-coded warm-core threshold Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

E3SM-Project/zppy#855 · Opened Aug 17, 2026
problem using mbtempest on NERSC Open

E3SM-Project/e3sm-unified#153 · 4 comments · 1 assignee · Opened Aug 14, 2026
[Feature]: Add dependeabot to update actions Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

E3SM-Project/zppy-interfaces#59 · 1 comment · Opened Aug 14, 2026
ELM inline interpolation of IC condition fail Open

E3SM-Project/E3SM#8631 · 1 comment · 1 assignee · Opened Aug 14, 2026
[DevOps]: Implement shared directory and unix group for multi-user simboard operations Open

type: devops

Difficulty 4/5 3-5 days Newbie friendliness 38/100

E3SM-Project/simboard#294 · 13 comments · Opened Aug 12, 2026
Failure to propagate Omega mesh updates to the cron CTests. Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

E3SM-Project/polaris#707 · 3 comments · Opened Aug 12, 2026
PROJ 9.8 changes Cartopy map rendering and breaks image regressions and intergration tests Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

E3SM-Project/e3sm_diags#1077 · Opened Aug 10, 2026
EAMxx: avg-count tracking is never set up for fill-aware diagnostic fields Open

bug EAMxx

Difficulty 3/5 1-2 days Newbie friendliness 75/100

E3SM-Project/E3SM#8619 · Opened Aug 10, 2026
EAMxx: Field::alias() drops the contiguous helper field, segfaulting sync_to_host/dev on GPU Open

bug EAMxx

Difficulty 3/5 1-2 days Newbie friendliness 76/100

E3SM-Project/E3SM#8618 · Opened Aug 10, 2026
Cold region soil thermal improvements / bug-fixes in ELM Open

ELM fromES

E3SM-Project/E3SM#8617 · 4 comments · 3 assignees · Opened Aug 10, 2026
MPASO: `mpaso_pr` has 4 failing tests Open

E3SM-Project/polaris#702 · 3 comments · 1 assignee · Opened Aug 9, 2026
[DevOps]: Make `machine_name` a required argument with no default in ingestion core config Open

type: devops

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

E3SM-Project/simboard#292 · Opened Aug 4, 2026
Addressing known potential bugs in ELM Open

Coupled Model ELM v4alpha

E3SM-Project/E3SM#8602 · 1 comment · 10 assignees · Opened Aug 3, 2026
create_clone does not copy EAMxx yaml files Open

EAMxx

E3SM-Project/E3SM#8596 · 3 comments · 1 assignee · Opened Aug 2, 2026
Non EAMxx atm components do not build on Frontier with `craygnu-mphipcc` compiler Open

data-models EAM EAMxx Frontier

Difficulty 3/5 1-2 days Newbie friendliness 68/100

E3SM-Project/E3SM#8594 · 1 comment · Opened Jul 31, 2026
Tool to convert CLM land initial conditions to ELM Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

E3SM-Project/E3SM#8593 · Opened Jul 31, 2026
Possible memory leak in elm/crops Open

ELM

E3SM-Project/E3SM#8583 · 1 assignee · Opened Jul 24, 2026
Different results with pre/post condition checks turned off Open

EAMxx

Difficulty 4/5 3-5 days Newbie friendliness 45/100

E3SM-Project/E3SM#8578 · 6 comments · Opened Jul 21, 2026
MPSO: `planar/internal_wave/vlr/default/forward` crashing on Pelrmutter with Intel Open

bug ocean

Difficulty 4/5 3-5 days Newbie friendliness 35/100

E3SM-Project/polaris#665 · 1 comment · Opened Jul 18, 2026
Possible hang in ATM init with ne120 test on pm-gpu `ERS_Lh6.ne120pg2_ne120pg2.F2010-SCREAMv1.pm-gpu_gnugpu.eamxx-L128--eamxx-prod` Open

EAMxx pm-gpu

Difficulty 4/5 3-5 days Newbie friendliness 45/100

E3SM-Project/E3SM#8563 · 2 comments · Opened Jul 15, 2026
Remove "baseline summary file" from baseline generation Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

E3SM-Project/cacts#40 · Opened Jul 14, 2026
[DevOps]: Add guidelines for specific material to ingest from performance archive directory Open

type: devops

Difficulty 4/5 3-5 days Newbie friendliness 54/100

E3SM-Project/simboard#259 · Opened Jul 9, 2026
Enable btr gyre hadv for MPAS-O Open

bug

E3SM-Project/polaris#653 · 1 assignee · Opened Jul 9, 2026
Sudden increase of sulfate in MAM4xx simulations Open

MAM4xx

E3SM-Project/E3SM#8550 · 6 comments · 2 reactions · 4 assignees · Opened Jul 8, 2026
[DevOps]: Add dry-run modes for comprehensive collection and ingestion testing Open

type: devops

Difficulty 4/5 3-5 days Newbie friendliness 25/100

E3SM-Project/simboard#256 · 8 comments · Opened Jul 8, 2026
Poor omega performance for barotropic_channel and barotropic_gyre on pm-cpu Open

ocean

Difficulty 4/5 3-5 days Newbie friendliness 35/100

E3SM-Project/polaris#647 · 6 comments · Opened Jul 7, 2026
Cron-scripts enhancements Open

cron enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

E3SM-Project/polaris#645 · Opened Jul 6, 2026
Add look up between `indexToCellID` in land/ocean components of the unified mesh and the union of the meshes Open

e3sm/init mesh unified-mesh

E3SM-Project/polaris#640 · 2 comments · 1 reaction · 1 assignee · Opened Jul 2, 2026
Add a Forward/Backward time stepping test Open

Difficulty 3/5 1-2 days Newbie friendliness 62/100

E3SM-Project/polaris#638 · 3 comments · Opened Jul 2, 2026
Dynamic figure size based on figure ascpect ratio Open

enhancement framework

Difficulty 4/5 3-5 days Newbie friendliness 52/100

E3SM-Project/polaris#637 · 1 reaction · Opened Jul 1, 2026
eamxx: refactor nudging scheme Open

EAMxx

E3SM-Project/E3SM#8524 · 1 reaction · 2 assignees · Opened Jun 27, 2026
Error when running a Land-Atmosphere Coupled Simulation Open

EAM

E3SM-Project/E3SM#8521 · 1 comment · 1 assignee · Opened Jun 26, 2026
Cron job installation Status Open

cron

E3SM-Project/polaris#631 · 2 comments · 1 assignee · Opened Jun 25, 2026
Perlmutter Nightly Omega Cron Job Failure Open

cron

E3SM-Project/polaris#630 · 5 comments · 1 assignee · Opened Jun 25, 2026
Unexpected Omega behavior from wind-forced barotropic channel Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

E3SM-Project/polaris#627 · Opened Jun 24, 2026
avoid "_build/html/" in docs link Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

E3SM-Project/e3sm_data_docs#78 · 4 comments · Opened Jun 23, 2026
[Enhancement]: Add lightweight case-level commenting for collaboration Open

feature: commenting

Difficulty 5/5 Over a week Newbie friendliness 45/100

E3SM-Project/simboard#232 · 1 comment · Opened Jun 23, 2026
[Feature]: Revamp docs to be more comprehensive Open

Documentation

Difficulty 5/5 Over a week Newbie friendliness 25/100

E3SM-Project/zstash#451 · 1 comment · Opened Jun 22, 2026
EAMxx: water isotopes/tracers (ecosystem project) Open

EAMxx fromES

E3SM-Project/E3SM#8504 · 1 assignee · Opened Jun 19, 2026
[Feature]: Extend ERA5 data availability through 2025 and improve data retrieval/processing workflow Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

E3SM-Project/e3sm_diags#1061 · Opened Jun 17, 2026
ERA5 DATM data - reference height discrepancy Open

data-models

Difficulty 4/5 3-5 days Newbie friendliness 45/100

E3SM-Project/E3SM#8490 · 18 comments · 1 reaction · Opened Jun 17, 2026
eamxx: fix uninit var warnings Open

EAMxx

E3SM-Project/E3SM#8483 · 1 reaction · 2 assignees · Opened Jun 17, 2026
[Build] Compiler warnings audit: HOMME/EAMxx build log (2026-06-17) Open

bug EAMxx HOMME Tech-debt

Difficulty 5/5 Over a week Newbie friendliness 42/100

E3SM-Project/E3SM#8482 · 5 comments · Opened Jun 17, 2026
New test case for `MinLayerCell != 0` Open

enhancement ocean

E3SM-Project/polaris#614 · 1 assignee · Opened Jun 15, 2026
Deep dive into root cause of a failed ensemble member with `ne32pg2_ne32pg2.F2010-SCREAMv1` Open

ELM

E3SM-Project/E3SM#8471 · 1 comment · 1 reaction · 1 assignee · Opened Jun 11, 2026

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