GEOS-ESM/MAPL
May 2025 – Jan 2026
3 Months active
Languages Used
Fortran
Technical Skills
Bug FixingData InterpolationFortran DevelopmentCode RefactoringFortranGrid Data Handling
Lizzie Lundgren
PROFILE
Lizzie Lundgren
Worked on the GEOS-ESM/MAPL repository, delivering features and fixes that improved data processing reliability and maintainability in scientific computing workflows. Addressed a time interpolation issue in ExtData by refining conditional logic to process only active IO bundles, ensuring accurate data handling during idle periods. Enhanced grid data integrity by correcting a unit conversion bug and refactored code for readability, adopting descriptive variable names to reduce future defect risk. Expanded data ingestion compatibility by implementing backwards support for non-CF vertical coordinates using a new dimension variable. Utilized Fortran, code refactoring, and data interpolation skills to strengthen end-to-end data workflows.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
4Total
Bugs
2
Commits
4
Features
2
Lines of code
144
Activity Months3
Your Network
22 peopleShared Repositories
22
Work History
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 (2026-01) MAPL: Implemented ExtData2G backwards compatibility for non-CF vertical coordinates to correctly interpret and process input files across data formats, expanding compatibility and usability. The change centers on a dimension variable 'lev' to support non-CF vertical coordinates. Commit 8b66447a41f8f9e88fb920cf82ab8ac5ba165945 (ExtData2G backwards compatibility with non-CF vertical coord #4300). Impact: reduces preprocessing overhead for users, broadens data format support, and improves reliability of data ingestion pipelines. Demonstrates data model adaptation, cross-format compatibility, and collaboration via issue #4300.
1 Commits • 1 Features
Jan 1, 2026January 2026 (2026-01) MAPL: Implemented ExtData2G backwards compatibility for non-CF vertical coordinates to correctly interpret and process input files across data formats, expanding compatibility and usability. The change centers on a dimension variable 'lev' to support non-CF vertical coordinates. Commit 8b66447a41f8f9e88fb920cf82ab8ac5ba165945 (ExtData2G backwards compatibility with non-CF vertical coord #4300). Impact: reduces preprocessing overhead for users, broadens data format support, and improves reliability of data ingestion pipelines. Demonstrates data model adaptation, cross-format compatibility, and collaboration via issue #4300.
January 2026
July 2025
2 Commits • 1 Features
Jul 1, 2025In July 2025, GEOS-ESM/MAPL delivered essential ExtData grid improvements and resolved a unit-conversion bug, enhancing data integrity and maintainability. Key contributions include a bug fix for ExtData target latitude/longitude handling and a readability-focused refactor of ExtDataGridCompMod.F90, with descriptive variable names to reduce cognitive load and future defects. These changes stabilize grid processing, improve coordinate accuracy, and lay groundwork for easier future maintenance while preserving existing functionality.
July 2025
2 Commits • 1 Features
Jul 1, 2025In July 2025, GEOS-ESM/MAPL delivered essential ExtData grid improvements and resolved a unit-conversion bug, enhancing data integrity and maintainability. Key contributions include a bug fix for ExtData target latitude/longitude handling and a readability-focused refactor of ExtDataGridCompMod.F90, with descriptive variable names to reduce cognitive load and future defects. These changes stabilize grid processing, improve coordinate accuracy, and lay groundwork for easier future maintenance while preserving existing functionality.
May 2025
1 Commits
May 1, 2025Monthly summary for 2025-05 (GEOS-ESM/MAPL). Key features delivered: - ExtData interpolation guard: added conditional to process only when there are active IO bundles, preventing skipped time interpolation and incorrect data processing when no current reads are present. Commit: 702a452fd0a56cc8256744105ee7368355ad1c09 ("Fix ExtData bug causing time interpolation to be skipped if no current read (#3734)"). Major bugs fixed: - Fixed ExtData bug where time interpolation could be skipped if there were no current reads; adjusted read loop logic to distinguish active vs idle IO scenarios, ensuring data is interpolated correctly whenever reads are available. Overall impact and accomplishments: - Increased data reliability and end-to-end data integrity for downstream analyses. - Reduced risk of data gaps in idle IO periods; improved robustness of the ExtData processing workflow in MAPL. Technologies/skills demonstrated: - Debugging and root-cause analysis in a data processing pipeline. - Conditional logic design for IO/bundle handling. - Version control practices and commit traceability. - Experience with ExtData component in MAPL and integration with I/O workflows.
1 Commits
May 1, 2025Monthly summary for 2025-05 (GEOS-ESM/MAPL). Key features delivered: - ExtData interpolation guard: added conditional to process only when there are active IO bundles, preventing skipped time interpolation and incorrect data processing when no current reads are present. Commit: 702a452fd0a56cc8256744105ee7368355ad1c09 ("Fix ExtData bug causing time interpolation to be skipped if no current read (#3734)"). Major bugs fixed: - Fixed ExtData bug where time interpolation could be skipped if there were no current reads; adjusted read loop logic to distinguish active vs idle IO scenarios, ensuring data is interpolated correctly whenever reads are available. Overall impact and accomplishments: - Increased data reliability and end-to-end data integrity for downstream analyses. - Reduced risk of data gaps in idle IO periods; improved robustness of the ExtData processing workflow in MAPL. Technologies/skills demonstrated: - Debugging and root-cause analysis in a data processing pipeline. - Conditional logic design for IO/bundle handling. - Version control practices and commit traceability. - Experience with ExtData component in MAPL and integration with I/O workflows.
May 2025
Activity
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Quality Metrics
Correctness95.0%
Maintainability90.0%
Architecture90.0%
Performance85.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
Fortran
Technical Skills
Bug FixingCode RefactoringData InterpolationFortranFortran DevelopmentFortran programmingGrid Data HandlingReadability ImprovementUnit Conversiondata processingscientific computing
Repositories Contributed To
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