E3SM-Project/E3SM
Nov 2024 – Apr 2026
15 Months active
Languages Used
FortranShellUnknowncmakePythonC++CMakePerl
Technical Skills
Build System ConfigurationCMakeClimate ModelingCode FormattingCode RefactoringFortran Development
Jon Wolfe
PROFILE
Jon Wolfe
Over 15 months, this developer advanced the E3SM-Project/E3SM repository by delivering 34 features and resolving 16 bugs, focusing on climate modeling, configuration management, and high-performance computing. They enhanced model reliability and reproducibility by standardizing build systems, aligning configurations with the Registry, and refining data integration for coupled simulations. Their work included implementing new model variants, improving test automation, and expanding diagnostics for ocean–atmosphere interactions. Using Fortran, Python, and CMake, they addressed numerical precision, streamlined CI pipelines, and strengthened test coverage. Their technical approach emphasized maintainability, robust configuration, and efficient data handling, supporting scalable, production-ready scientific workflows.
Overall Statistics
Feature vs Bugs
68%Features
Repository Contributions
81Total
Bugs
16
Commits
81
Features
34
Lines of code
8,746,789
Activity Months15
Your Network
175 peopleShared Repositories
108
Abhishek BagusettyMember
Erin ThomasMember
Erin ThomasMember
Oscar Diaz-IbarraMember
Andrew RobertsMember
Andrew RobertsMember
Alexander HagerMember
Andrew M. BradleyMember
Andrew M. BradleyMember
Work History
April 2026
5 Commits • 2 Features
Apr 1, 2026Concise monthly summary for 2026-04 focusing on key feature deliveries, major bug fixes, impact, and skills demonstrated for the E3SM project.
5 Commits • 2 Features
Apr 1, 2026Concise monthly summary for 2026-04 focusing on key feature deliveries, major bug fixes, impact, and skills demonstrated for the E3SM project.
April 2026
February 2026
3 Commits • 2 Features
Feb 1, 2026February 2026 monthly summary for E3SM focusing on business value and technical achievements. Delivered reliability and data-integration enhancements in MPAS and Registry, with build/config hygiene improvements to support reproducible workflows. These changes improve observability, configuration consistency, and data availability for freshwater flux analysis, enabling more reliable simulations and downstream analyses.
February 2026
3 Commits • 2 Features
Feb 1, 2026February 2026 monthly summary for E3SM focusing on business value and technical achievements. Delivered reliability and data-integration enhancements in MPAS and Registry, with build/config hygiene improvements to support reproducible workflows. These changes improve observability, configuration consistency, and data availability for freshwater flux analysis, enabling more reliable simulations and downstream analyses.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 – E3SM repository (E3SM-Project/E3SM): Focused on simplifying the test environment configuration to speed up and stabilize CI pipelines. Delivered a streamlined test environment configuration by removing unnecessary shell commands from the test definition (commit 1352ba778a25a0d77ed6601f6f2e95dae7102eaa). This reduces setup time and improves reproducibility in CI. No major bugs fixed in this period for this repo scope.
1 Commits • 1 Features
Dec 1, 2025December 2025 – E3SM repository (E3SM-Project/E3SM): Focused on simplifying the test environment configuration to speed up and stabilize CI pipelines. Delivered a streamlined test environment configuration by removing unnecessary shell commands from the test definition (commit 1352ba778a25a0d77ed6601f6f2e95dae7102eaa). This reduces setup time and improves reproducibility in CI. No major bugs fixed in this period for this repo scope.
December 2025
October 2025
1 Commits
Oct 1, 2025Month: 2025-10 — Focused on correctness and stability in the OCN surface bulk forcing pathway for MPAS-ocean within E3SM. Delivered a targeted OpenACC pragma correction to the ocn_surface_bulk_forcing_vel routine to ensure proper data transfer semantics and safe handling of temporary variables (e.g., ekeCorrection) during surface bulk forcing calculations. The fix reduces risk of incorrect results due to copyout/delete directives and improves performance portability across accelerators. Work completed with a single critical commit and aligns with ongoing QA and validation efforts.
October 2025
1 Commits
Oct 1, 2025Month: 2025-10 — Focused on correctness and stability in the OCN surface bulk forcing pathway for MPAS-ocean within E3SM. Delivered a targeted OpenACC pragma correction to the ocn_surface_bulk_forcing_vel routine to ensure proper data transfer semantics and safe handling of temporary variables (e.g., ekeCorrection) during surface bulk forcing calculations. The fix reduces risk of incorrect results due to copyout/delete directives and improves performance portability across accelerators. Work completed with a single critical commit and aligns with ongoing QA and validation efforts.
September 2025
6 Commits • 4 Features
Sep 1, 2025September 2025 monthly summary for E3SM focused on configuration robustness, IO efficiency, and CORE-II workflow readiness. Delivered four features with targeted fixes to reduce misconfigurations and build issues, enhancing reproducibility and production readiness across simulations.
6 Commits • 4 Features
Sep 1, 2025September 2025 monthly summary for E3SM focused on configuration robustness, IO efficiency, and CORE-II workflow readiness. Delivered four features with targeted fixes to reduce misconfigurations and build issues, enhancing reproducibility and production readiness across simulations.
September 2025
August 2025
6 Commits • 2 Features
Aug 1, 2025Month: 2025-08 – E3SM project work summary focusing on delivering key features, stabilizing builds, and expanding test coverage in the E3SM repository. The work emphasizes business value through safer configurations, reproducible builds, and improved QA visibility.
August 2025
6 Commits • 2 Features
Aug 1, 2025Month: 2025-08 – E3SM project work summary focusing on delivering key features, stabilizing builds, and expanding test coverage in the E3SM repository. The work emphasizes business value through safer configurations, reproducible builds, and improved QA visibility.
July 2025
8 Commits • 2 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on business value and technical achievements. Delivered foundational bigrid capability and registry/build alignment across MPAS-Ocean, establishing a consistent configuration base for LND2ROF/ROF2LND mappings and mesh handling. These efforts reduce future integration risk and accelerate accurate ocean simulations.
8 Commits • 2 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on business value and technical achievements. Delivered foundational bigrid capability and registry/build alignment across MPAS-Ocean, establishing a consistent configuration base for LND2ROF/ROF2LND mappings and mesh handling. These efforts reduce future integration risk and accelerate accurate ocean simulations.
July 2025
June 2025
4 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for E3SM: Reliability and precision improvements for MPAS-based simulations. Delivered robust abort handling in MPAS for coupled systems by selecting the correct abort routine (shr_sys_abort) depending on build configuration, plus reworked mpas_log_abort to improve reliability. Also enhanced numerical precision for domain generation and domain files by lowering fminval default to 1e-8 and updating domain thresholds. These changes increase stability of coupled simulations, reduce debugging effort, and improve the fidelity of domain definitions.
June 2025
4 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for E3SM: Reliability and precision improvements for MPAS-based simulations. Delivered robust abort handling in MPAS for coupled systems by selecting the correct abort routine (shr_sys_abort) depending on build configuration, plus reworked mpas_log_abort to improve reliability. Also enhanced numerical precision for domain generation and domain files by lowering fminval default to 1e-8 and updating domain thresholds. These changes increase stability of coupled simulations, reduce debugging effort, and improve the fidelity of domain definitions.
May 2025
7 Commits • 4 Features
May 1, 2025May 2025 performance summary for the E3SM project. Focused on delivering targeted features, stabilizing configuration/build pipelines, and improving test management. Highlights include land fraction handling improvement, ROF_NCPL restoration, build system alignment with Registry and new MPAS-Ocean config option, removal of redundant NCPL settings for G-cases with MALI, and a test-suite reorganization for MALI TF tests. These workstreams improved calculation accuracy and efficiency, reduced configuration risks, and strengthened QA coverage.
7 Commits • 4 Features
May 1, 2025May 2025 performance summary for the E3SM project. Focused on delivering targeted features, stabilizing configuration/build pipelines, and improving test management. Highlights include land fraction handling improvement, ROF_NCPL restoration, build system alignment with Registry and new MPAS-Ocean config option, removal of redundant NCPL settings for G-cases with MALI, and a test-suite reorganization for MALI TF tests. These workstreams improved calculation accuracy and efficiency, reduced configuration risks, and strengthened QA coverage.
May 2025
April 2025
10 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for E3SM project: Delivered build/configuration standardization, expanded inter-component coupling with NCPL grid/resource support, improved test quality and data efficiency, and fixed a critical tracer conservation bug. These efforts enhanced build reproducibility, interoperability across components, testing efficiency, and runtime stability, positioning the project for smoother CI cycles and scalable simulations.
April 2025
10 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for E3SM project: Delivered build/configuration standardization, expanded inter-component coupling with NCPL grid/resource support, improved test quality and data efficiency, and fixed a critical tracer conservation bug. These efforts enhanced build reproducibility, interoperability across components, testing efficiency, and runtime stability, positioning the project for smoother CI cycles and scalable simulations.
March 2025
4 Commits • 2 Features
Mar 1, 2025March 2025 monthly summary for E3SM project (repo: E3SM-Project/E3SM). Focused on delivering a new configuration variant, expanding mesh testing, and tightening build/data references to improve readiness and reduce run-time risk. Key outcomes include TL319_oQU240wLI_gis4to40 support in namelist processing, gis4to40 mesh test coverage, and alignment of tracer forcing group ordering with Registry plus update to cdf5 data file references. These changes streamline onboarding for new configurations, enhance test coverage for mesh resolutions, and improve build integrity.
4 Commits • 2 Features
Mar 1, 2025March 2025 monthly summary for E3SM project (repo: E3SM-Project/E3SM). Focused on delivering a new configuration variant, expanding mesh testing, and tightening build/data references to improve readiness and reduce run-time risk. Key outcomes include TL319_oQU240wLI_gis4to40 support in namelist processing, gis4to40 mesh test coverage, and alignment of tracer forcing group ordering with Registry plus update to cdf5 data file references. These changes streamline onboarding for new configurations, enhance test coverage for mesh resolutions, and improve build integrity.
March 2025
February 2025
5 Commits • 2 Features
Feb 1, 2025February 2025 highlights: Standardized geospatial mapping data handling with gis4to40 support and naming alignment for deeperThan300m mapping files, strengthening data interoperability and maintainability. Stabilized build and Registry configurations by aligning bld files and correcting resolution/mapping for ne30-r025-icos, reducing build/run errors. Expanded validation coverage for frazil ice porosity in MPAS with targeted tests (including stealth test and related testdef), enhancing reliability across configurations. Overall impact includes improved data quality, lower integration risk, and stronger modeling confidence across MPAS configurations.
February 2025
5 Commits • 2 Features
Feb 1, 2025February 2025 highlights: Standardized geospatial mapping data handling with gis4to40 support and naming alignment for deeperThan300m mapping files, strengthening data interoperability and maintainability. Stabilized build and Registry configurations by aligning bld files and correcting resolution/mapping for ne30-r025-icos, reducing build/run errors. Expanded validation coverage for frazil ice porosity in MPAS with targeted tests (including stealth test and related testdef), enhancing reliability across configurations. Overall impact includes improved data quality, lower integration risk, and stronger modeling confidence across MPAS configurations.
January 2025
5 Commits • 3 Features
Jan 1, 2025January 2025 Monthly Summary for E3SM development focusing on configurability, initialization consistency, and expanded model configurations. Delivered features improve alignment with the Registry, enable more robust scenario testing, and enhance build reliability. Key fixes reduce compilation risk in land ice and ensure consistent initialization across run types.
5 Commits • 3 Features
Jan 1, 2025January 2025 Monthly Summary for E3SM development focusing on configurability, initialization consistency, and expanded model configurations. Delivered features improve alignment with the Registry, enable more robust scenario testing, and enhance build reliability. Key fixes reduce compilation risk in land ice and ensure consistent initialization across run types.
January 2025
December 2024
5 Commits • 3 Features
Dec 1, 2024December 2024 monthly summary for E3SM focusing on delivering key enhancements to ocean–glacier coupling, refining budget fidelity, and improving code maintainability. Key features delivered: - Ocean-Glacier Thermal Forcing Control: Introduced ocn_c2_glctf flag from infodata to conditionally enable transfer of 2D thermal forcing data from the ocean to the glacier driver, refining thermal coupling between ocean and glacier components. Commit: 53e780782075d307f019e12823d4553cbc5a2fa5 (Get and use ocn_c2_glctf from infodata in ocn and glc drivers). - GLC Budget Refinement: Land fractions and ice mask contributions: Updated land fraction and ice mask calculations for the GLC budget; refactored variable names and incorporated effective area to improve flux and budget accuracy. Commit: 7b42c2e8ee1c0230da2578875ccda882353d7fe1 (Updates for the glc budget). - Code Maintainability: Initialization and Module Refactor: Refactors initialization of ocn_c2_glctf and ocn_c2_glcshelf to be set by the mpaso component (removing explicit .false.); relocates runningMeanRemovedIceRunoff from restart_contents to streams module to improve modularity and maintainability. Commits: 827be38045217ba53da2064374c08f13cc1f760f; 2b04f9281e682226c1727bd1bfe9db6fcc29136d (Clean-up ocn_c2_glc variables; Move runningMeanRemovedIceRunoff to streams). Major bugs fixed: - Ocean-Glacier Coupling Robustness Enhancement (So_tf2d Quiet Mode): Modified mct_avect_indexra call for So_tf2d to include perrWith='quiet', preventing issues when So_tf2d is inactive and ensuring smoother MPAS ocean coupling index execution. Commit: e294a1df3dffb076834e29dead598ad72f509e24 (Add perrWith=quiet for So_tf2d to avoid issues when it is not active). Overall impact and accomplishments: - Increased stability and fidelity of ocean–glacier interactions through conditional thermal forcing transfer and robust coupling logic. - Improved budget closure and flux accuracy in the GLC budget via more precise land fraction/ice mask handling and effective area usage. - Enhanced code maintainability and modularity, reducing restart dependencies and easing future development, testing, and integration with mpaso-based initialization. Technologies/skills demonstrated: - Fortran-based model integration, flag-driven data transfer, and MPAS coupling patterns. - Refactoring for initialization, modularity (streams module), and restart/content management. - Attention to numerical robustness (quiet-mode handling) and maintainability of legacy interfaces. Business value: - More reliable projections through tighter climate component coupling and improved budget accounting, enabling better decision-making and model validation for stakeholders.
December 2024
5 Commits • 3 Features
Dec 1, 2024December 2024 monthly summary for E3SM focusing on delivering key enhancements to ocean–glacier coupling, refining budget fidelity, and improving code maintainability. Key features delivered: - Ocean-Glacier Thermal Forcing Control: Introduced ocn_c2_glctf flag from infodata to conditionally enable transfer of 2D thermal forcing data from the ocean to the glacier driver, refining thermal coupling between ocean and glacier components. Commit: 53e780782075d307f019e12823d4553cbc5a2fa5 (Get and use ocn_c2_glctf from infodata in ocn and glc drivers). - GLC Budget Refinement: Land fractions and ice mask contributions: Updated land fraction and ice mask calculations for the GLC budget; refactored variable names and incorporated effective area to improve flux and budget accuracy. Commit: 7b42c2e8ee1c0230da2578875ccda882353d7fe1 (Updates for the glc budget). - Code Maintainability: Initialization and Module Refactor: Refactors initialization of ocn_c2_glctf and ocn_c2_glcshelf to be set by the mpaso component (removing explicit .false.); relocates runningMeanRemovedIceRunoff from restart_contents to streams module to improve modularity and maintainability. Commits: 827be38045217ba53da2064374c08f13cc1f760f; 2b04f9281e682226c1727bd1bfe9db6fcc29136d (Clean-up ocn_c2_glc variables; Move runningMeanRemovedIceRunoff to streams). Major bugs fixed: - Ocean-Glacier Coupling Robustness Enhancement (So_tf2d Quiet Mode): Modified mct_avect_indexra call for So_tf2d to include perrWith='quiet', preventing issues when So_tf2d is inactive and ensuring smoother MPAS ocean coupling index execution. Commit: e294a1df3dffb076834e29dead598ad72f509e24 (Add perrWith=quiet for So_tf2d to avoid issues when it is not active). Overall impact and accomplishments: - Increased stability and fidelity of ocean–glacier interactions through conditional thermal forcing transfer and robust coupling logic. - Improved budget closure and flux accuracy in the GLC budget via more precise land fraction/ice mask handling and effective area usage. - Enhanced code maintainability and modularity, reducing restart dependencies and easing future development, testing, and integration with mpaso-based initialization. Technologies/skills demonstrated: - Fortran-based model integration, flag-driven data transfer, and MPAS coupling patterns. - Refactoring for initialization, modularity (streams module), and restart/content management. - Attention to numerical robustness (quiet-mode handling) and maintainability of legacy interfaces. Business value: - More reliable projections through tighter climate component coupling and improved budget accounting, enabling better decision-making and model validation for stakeholders.
November 2024
11 Commits • 3 Features
Nov 1, 2024November 2024 monthly summary focused on delivering cross-machine build/config reliability, expanding model capabilities, and strengthening climate variable budgets while minimizing run-time issues. Key work across the E3SM repository included consolidating build and configuration processes for consistency, adding new namelist options for MPAS-Ocean, introducing a thermal forcing field (flds_tf), and refining GLC budget calculations and field initializations. A targeted SSH consistency tweak was applied to avoid validation issues in a specific configuration, reducing run failures in that scenario.
11 Commits • 3 Features
Nov 1, 2024November 2024 monthly summary focused on delivering cross-machine build/config reliability, expanding model capabilities, and strengthening climate variable budgets while minimizing run-time issues. Key work across the E3SM repository included consolidating build and configuration processes for consistency, adding new namelist options for MPAS-Ocean, introducing a thermal forcing field (flds_tf), and refining GLC budget calculations and field initializations. A targeted SSH consistency tweak was applied to avoid validation issues in a specific configuration, reducing run failures in that scenario.
November 2024
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Quality Metrics
Correctness86.6%
Maintainability86.6%
Architecture83.4%
Performance78.2%
AI Usage20.4%
Skills & Technologies
Programming Languages
C++CMakeFortranPerlPythonShellUnknownXMLcmake
Technical Skills
Build System ConfigurationBuild SystemsCI/CDCIMECMakeClimate ModelingClimate Modeling ConfigurationCode FormattingCode OrganizationCode RefactoringConfigurationConfiguration ManagementCoupled Model DevelopmentData ManagementData Mapping
Repositories Contributed To
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