E3SM-Project/E3SM
Oct 2024 – Jun 2025
4 Months active
Languages Used
Fortran
Technical Skills
Climate ModelingFortran ProgrammingNumerical ModelingNumerical SimulationScientific ComputingAdvection Schemes
Trevor Hillebrand
PROFILE
Trevor Hillebrand
Contributed to the E3SM-Project/E3SM repository by developing and refining glacier and climate modeling features using Fortran and advanced numerical methods. Over four months, delivered enhancements such as a crevasse-depth calving model with user-defined scaling, improved mass conservation in Runge-Kutta time integration, and runtime analysis for ice flux through gates. Addressed numerical stability and accuracy by fixing edge-aware flux calculations, resolving edgeMask inconsistencies, and updating velocity handling in physics kernels. Focused on code maintainability through documentation updates, code cleanup, and registry improvements. The work enabled more reliable simulations, deeper transport analysis, and streamlined future development in scientific computing workflows.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
15Total
Bugs
4
Commits
15
Features
4
Lines of code
635
Activity Months4
Your Network
178 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
June 2025
8 Commits • 3 Features
Jun 1, 2025June 2025 highlights: Delivered physics-enhancement features and stability fixes in the E3SM glacier modeling stack, with a focus on calving physics realism, numerical stability, and developer maintainability. Key feature deliveries include the crevasse-depth calving model enhancement with face-melting effects, strain-rate tuning, and user-defined scaling. Critical bug fixes in flux and strain-rate calculations improve edge-aware flux accounting, remove double-counting in halos, and correct effective strain rate and meanFlowParamA across varying layer thicknesses. Registry and documentation enhancements add the fluxGateNames variable and clearer edge-mask guidance, complemented by advection module documentation updates. Code cleanup reduces restart-related variables to simplify the codebase. These changes collectively increase simulation realism, reliability, and maintainability, enabling more accurate forecasts and smoother future development work.
8 Commits • 3 Features
Jun 1, 2025June 2025 highlights: Delivered physics-enhancement features and stability fixes in the E3SM glacier modeling stack, with a focus on calving physics realism, numerical stability, and developer maintainability. Key feature deliveries include the crevasse-depth calving model enhancement with face-melting effects, strain-rate tuning, and user-defined scaling. Critical bug fixes in flux and strain-rate calculations improve edge-aware flux accounting, remove double-counting in halos, and correct effective strain rate and meanFlowParamA across varying layer thicknesses. Registry and documentation enhancements add the fluxGateNames variable and clearer edge-mask guidance, complemented by advection module documentation updates. Code cleanup reduces restart-related variables to simplify the codebase. These changes collectively increase simulation realism, reliability, and maintainability, enabling more accurate forecasts and smoother future development work.
June 2025
March 2025
4 Commits • 1 Features
Mar 1, 20252025-03 Monthly Summary for E3SM: Delivered targeted fixes and new capabilities to improve mass conservation and transport analysis. Key features include RK time integration mass conservation fixes and Ice Flux Through Gates Analysis, with integration into the analysis driver and robust masking for flux calculations. These changes enhance simulation fidelity, enable detailed transport evaluations through gates, and demonstrate strong software quality practices in the reported month.
March 2025
4 Commits • 1 Features
Mar 1, 20252025-03 Monthly Summary for E3SM: Delivered targeted fixes and new capabilities to improve mass conservation and transport analysis. Key features include RK time integration mass conservation fixes and Ice Flux Through Gates Analysis, with integration into the analysis driver and robust masking for flux calculations. These changes enhance simulation fidelity, enable detailed transport evaluations through gates, and demonstrate strong software quality practices in the reported month.
November 2024
1 Commits
Nov 1, 2024November 2024 monthly summary for E3SM: Stabilized time integration behavior by aligning layerNormalVelocity recalculation with the RK method to resolve edgeMask inconsistency and prevent the observed face-melting issue. The change improves numerical stability, cross-method reproducibility, and reliability of production runs; lays groundwork for RK-based workflows and future physics enhancements.
1 Commits
Nov 1, 2024November 2024 monthly summary for E3SM: Stabilized time integration behavior by aligning layerNormalVelocity recalculation with the RK method to resolve edgeMask inconsistency and prevent the observed face-melting issue. The change improves numerical stability, cross-method reproducibility, and reliability of production runs; lays groundwork for RK-based workflows and future physics enhancements.
November 2024
October 2024
2 Commits
Oct 1, 2024Monthly work summary for 2024-10 focusing on correctness and accuracy improvements in Runge-Kutta time integration for E3SM. Implemented updates to layerNormalVelocity during RK stages and switched layerThicknessEdge calculation to rely on layerNormalVelocity, enhancing simulation fidelity and stability. All changes contribute to more reliable velocity updates and edge-case handling in RK-based runs. Commits include: 0ad93902c174b8b4c6494210f0f7ca880607c44a; d33a72f144e5c7b9c37e65305d564c0a878a7226.
October 2024
2 Commits
Oct 1, 2024Monthly work summary for 2024-10 focusing on correctness and accuracy improvements in Runge-Kutta time integration for E3SM. Implemented updates to layerNormalVelocity during RK stages and switched layerThicknessEdge calculation to rely on layerNormalVelocity, enhancing simulation fidelity and stability. All changes contribute to more reliable velocity updates and edge-case handling in RK-based runs. Commits include: 0ad93902c174b8b4c6494210f0f7ca880607c44a; d33a72f144e5c7b9c37e65305d564c0a878a7226.
Activity
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Quality Metrics
Correctness86.8%
Maintainability86.6%
Architecture84.0%
Performance72.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
Fortran
Technical Skills
Advection SchemesClimate ModelingCode CleanupCode DebuggingCode RefactoringCode ReviewDocumentationFortran DevelopmentFortran ProgrammingGlaciology ModelingNumerical MethodsNumerical ModelingNumerical SimulationScientific ComputingSoftware Development
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