schism-dev/schism
Nov 2024 – Oct 2025
12 Months active
Languages Used
FortranCMakeMATLABMakefileMarkdownNMLcmakemakefile
Technical Skills
Code DocumentationData ProcessingFortran ProgrammingScientific ComputingBuild SystemsC/C++ Development
Joseph Zhang
PROFILE
Joseph Zhang
Yongjiu Zhang developed and maintained core features for the schism-dev/schism repository, focusing on advancing environmental and climate modeling capabilities. Over twelve months, Zhang engineered robust solutions for atmospheric data processing, sediment transport, and marsh dynamics, using Fortran and C to enhance simulation fidelity and workflow stability. He improved parallel computing performance, refined build systems, and introduced new utilities for grid quality assessment and output post-processing. His work emphasized code clarity, maintainability, and documentation, reducing onboarding time and user errors. By addressing both feature development and bug fixes, Zhang delivered scalable, reliable tools that support large-scale scientific computing and model-driven analysis.
Overall Statistics
Feature vs Bugs
72%Features
Repository Contributions
117Total
Bugs
16
Commits
117
Features
42
Lines of code
16,027
Activity Months12
Your Network
22 people
Work History
October 2025
5 Commits • 3 Features
Oct 1, 2025In Oct 2025, SCHISM development focused on robustness, accuracy, and maintainability of the grid and physics components. Key features delivered include mean-based soil conductivity, improved small-grid robustness via default aspect ratio, and enhanced vertical grid generation, complemented by critical bug fixes and documentation improvements. These changes reduce edge-case failures, improve simulation stability across grid scales, and enhance developer productivity through clearer structure and traceability.
5 Commits • 3 Features
Oct 1, 2025In Oct 2025, SCHISM development focused on robustness, accuracy, and maintainability of the grid and physics components. Key features delivered include mean-based soil conductivity, improved small-grid robustness via default aspect ratio, and enhanced vertical grid generation, complemented by critical bug fixes and documentation improvements. These changes reduce edge-case failures, improve simulation stability across grid scales, and enhance developer productivity through clearer structure and traceability.
October 2025
September 2025
5 Commits • 2 Features
Sep 1, 2025September 2025: Schism development focused on improving usability, reliability, and accuracy. Highlights include substantial documentation and model comment improvements across beta notes and in-code comments to clarify inputs, solver notes, and configuration flags, reducing onboarding time and misconfigurations. A new capability for spatially variable vertical flux correction was introduced via vclose_surf_frac0, enabling per-grid corrections with negative values in .gr3 files to improve model fidelity in heterogeneous domains. A marsh age dimension allocation bug was fixed for age_marsh, eliminating runtime errors and ensuring more accurate marsh simulations. These deliverables strengthen business value by improving model reliability, reproducibility, and scalability, while demonstrating skills in documentation, configuration management, per-grid numerical corrections, and robust bug fixing.
September 2025
5 Commits • 2 Features
Sep 1, 2025September 2025: Schism development focused on improving usability, reliability, and accuracy. Highlights include substantial documentation and model comment improvements across beta notes and in-code comments to clarify inputs, solver notes, and configuration flags, reducing onboarding time and misconfigurations. A new capability for spatially variable vertical flux correction was introduced via vclose_surf_frac0, enabling per-grid corrections with negative values in .gr3 files to improve model fidelity in heterogeneous domains. A marsh age dimension allocation bug was fixed for age_marsh, eliminating runtime errors and ensuring more accurate marsh simulations. These deliverables strengthen business value by improving model reliability, reproducibility, and scalability, while demonstrating skills in documentation, configuration management, per-grid numerical corrections, and robust bug fixing.
August 2025
24 Commits • 11 Features
Aug 1, 2025August 2025 monthly summary for schism development: Delivered substantial feature enhancements, stability improvements, and documentation updates across the core modeling stack. The work emphasizes scalability, output reliability, and performance, enabling larger mesh simulations and more robust workflows for end users.
24 Commits • 11 Features
Aug 1, 2025August 2025 monthly summary for schism development: Delivered substantial feature enhancements, stability improvements, and documentation updates across the core modeling stack. The work emphasizes scalability, output reliability, and performance, enabling larger mesh simulations and more robust workflows for end users.
August 2025
July 2025
8 Commits • 3 Features
Jul 1, 2025July 2025 performance summary for schism-dev/schism: Delivered stability improvements and feature refinements across the Sed3D sediment transport module, enhanced build tooling with surface nudging support, and strengthened documentation/versioning practices. A critical NetCDF I/O bug was fixed to ensure proper file handling and robustness in time variable queries, contributing to overall reliability in data processing and runs.
July 2025
8 Commits • 3 Features
Jul 1, 2025July 2025 performance summary for schism-dev/schism: Delivered stability improvements and feature refinements across the Sed3D sediment transport module, enhanced build tooling with surface nudging support, and strengthened documentation/versioning practices. A critical NetCDF I/O bug was fixed to ensure proper file handling and robustness in time variable queries, contributing to overall reliability in data processing and runs.
June 2025
5 Commits • 2 Features
Jun 1, 2025June 2025: Focused on improving documentation clarity, enhancing input handling readability, and extending SCHISM outputs with timing information for maximum values. Delivered two major feature sets with clear business value: user-facing documentation realignment and dual-format max-value timing support.
5 Commits • 2 Features
Jun 1, 2025June 2025: Focused on improving documentation clarity, enhancing input handling readability, and extending SCHISM outputs with timing information for maximum values. Delivered two major feature sets with clear business value: user-facing documentation realignment and dual-format max-value timing support.
June 2025
May 2025
12 Commits • 2 Features
May 1, 2025May 2025 performance summary for schism-dev/schism focusing on delivering business value through enhanced modeling capabilities, safer data handling, and solid maintenance. Work prioritized enabling more accurate coastal dynamics simulations, streamlined workflows for downstream users, and clearer documentation to reduce onboarding friction.
May 2025
12 Commits • 2 Features
May 1, 2025May 2025 performance summary for schism-dev/schism focusing on delivering business value through enhanced modeling capabilities, safer data handling, and solid maintenance. Work prioritized enabling more accurate coastal dynamics simulations, streamlined workflows for downstream users, and clearer documentation to reduce onboarding friction.
April 2025
15 Commits • 3 Features
Apr 1, 2025Concise April 2025 monthly summary for schism-dev/schism focusing on business value and technical achievements. Delivered modeling enhancements, robustness improvements, and clearer documentation to support adoption and maintainability.
15 Commits • 3 Features
Apr 1, 2025Concise April 2025 monthly summary for schism-dev/schism focusing on business value and technical achievements. Delivered modeling enhancements, robustness improvements, and clearer documentation to support adoption and maintainability.
April 2025
March 2025
9 Commits • 3 Features
Mar 1, 2025March 2025 (schism-dev/schism): Focused on delivering higher-fidelity physics, robust stability, and cross-model integration while improving documentation and run reliability. The month delivered tangible business value by improving simulation accuracy for light-attenuation modeling, ensuring mesh reliability for large-scale meshes, stabilizing core numerical routines, and enabling smoother coupling with external climate models. Overall, the work reduces risk in large deployments, accelerates model-driven decision-making, and enhances developer onboarding via clearer guidance and samples.
March 2025
9 Commits • 3 Features
Mar 1, 2025March 2025 (schism-dev/schism): Focused on delivering higher-fidelity physics, robust stability, and cross-model integration while improving documentation and run reliability. The month delivered tangible business value by improving simulation accuracy for light-attenuation modeling, ensuring mesh reliability for large-scale meshes, stabilizing core numerical routines, and enabling smoother coupling with external climate models. Overall, the work reduces risk in large deployments, accelerates model-driven decision-making, and enhances developer onboarding via clearer guidance and samples.
February 2025
9 Commits • 3 Features
Feb 1, 2025February 2025 (schism-dev/schism) delivered key features and stability improvements across the ice module, namespace clarity, and performance enhancements. Major work focused on multi-class ice tooling, codebase hygiene, and parallel execution optimizations, driving reliability and production-readiness for multi-ice simulations.
9 Commits • 3 Features
Feb 1, 2025February 2025 (schism-dev/schism) delivered key features and stability improvements across the ice module, namespace clarity, and performance enhancements. Major work focused on multi-class ice tooling, codebase hygiene, and parallel execution optimizations, driving reliability and production-readiness for multi-ice simulations.
February 2025
January 2025
8 Commits • 4 Features
Jan 1, 2025January 2025 performance highlights for schism-dev/schism focused on stability, maintainability, and expanded capability. Completed targeted codebase cleanup, strengthened parallel-runtime robustness, and extended atmospheric forcing support and data handling. Implemented a grid quality metric utility to standardize QA and improved sample data alignment to reflect parameter removals. These efforts delivered clearer code, fewer runtime crashes, broader scenario support, and more accurate simulations across workflows.
January 2025
8 Commits • 4 Features
Jan 1, 2025January 2025 performance highlights for schism-dev/schism focused on stability, maintainability, and expanded capability. Completed targeted codebase cleanup, strengthened parallel-runtime robustness, and extended atmospheric forcing support and data handling. Implemented a grid quality metric utility to standardize QA and improved sample data alignment to reflect parameter removals. These efforts delivered clearer code, fewer runtime crashes, broader scenario support, and more accurate simulations across workflows.
December 2024
15 Commits • 4 Features
Dec 1, 2024December 2024 was focused on delivering high-value features, stabilizing core workflows, and improving performance in schism-dev/schism. The team concentrated on documentation clarity, forecast accuracy, parallel I/O efficiency, and enhanced ice dynamics outputs. These efforts reduced user errors, improved reliability for large-scale runs, and strengthened data capture for downstream analyses.
15 Commits • 4 Features
Dec 1, 2024December 2024 was focused on delivering high-value features, stabilizing core workflows, and improving performance in schism-dev/schism. The team concentrated on documentation clarity, forecast accuracy, parallel I/O efficiency, and enhanced ice dynamics outputs. These efforts reduced user errors, improved reliability for large-scale runs, and strengthened data capture for downstream analyses.
December 2024
November 2024
2 Commits • 2 Features
Nov 1, 2024November 2024 (2024-11) focused on delivering forecast data processing capabilities and improving particle-tracking configuration documentation in schism. Key deliverables include enabling forecast-mode processing in extraction scripts by updating read_output9_xyz.f90 and read_output10_xyz.f90 to accept hindcast vs forecast inputs, record ranges, and time offsets, enabling correct handling and output of forecast time-series data. Additionally, documentation for particle-tracking input parameters was enhanced to clarify oil spill behavior, biofouling, and particle stranding, improving usability and configurability. These changes reduce setup errors, shorten onboarding, and enable more accurate forecast-driven analyses. Technologies exercised include Fortran-based script enhancements, time-series data handling, and documentation discipline.
November 2024
2 Commits • 2 Features
Nov 1, 2024November 2024 (2024-11) focused on delivering forecast data processing capabilities and improving particle-tracking configuration documentation in schism. Key deliverables include enabling forecast-mode processing in extraction scripts by updating read_output9_xyz.f90 and read_output10_xyz.f90 to accept hindcast vs forecast inputs, record ranges, and time offsets, enabling correct handling and output of forecast time-series data. Additionally, documentation for particle-tracking input parameters was enhanced to clarify oil spill behavior, biofouling, and particle stranding, improving usability and configurability. These changes reduce setup errors, shorten onboarding, and enable more accurate forecast-driven analyses. Technologies exercised include Fortran-based script enhancements, time-series data handling, and documentation discipline.
Activity
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Quality Metrics
Correctness88.6%
Maintainability89.2%
Architecture85.4%
Performance82.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
CCMakeFortranMATLABMakefileMarkdownN/ANMLNamelistNone
Technical Skills
Atmospheric Data ProcessingAtmospheric ScienceBug FixingBuild SystemBuild SystemsC ProgrammingC/C++ DevelopmentClimate ModelingClimate ScienceCoastal EngineeringCode CleanupCode CommentingCode CorrectionCode DebuggingCode Documentation
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