July 2026: Delivered targeted ICON land-frac support and refactored area-type coordinate handling in ESMValCore. Consolidated area-type coordinates into a single utility (add_scalar_areatype_coord), expanded ICON land-fraction variables, and updated CMOR fixes/configs to align with the new variables. This work improves model fidelity, data compatibility, and maintainability for ICON-based workflows.

May 2026 monthly summary focusing on key accomplishments for ESMValGroup/ESMValTool: - Delivered a new Zero Emission Commitment (ZEC) Temperature Calculation feature for CMIP7 data via a dedicated ZEC CMIP7 recipe, expanding climate modeling capabilities. - The feature was implemented in the ESMValTool repository and tracked under commit 6f98780459a8641ed139042037c464bc4d76fe25 ("add ZEC CMIP7 recipe (#4458)").

Month: 2026-03 Key accomplishments: - Feature delivered: Dependency upgrade for ESMValCore compatibility. Upgraded ESMValCore from 2.14.0rc1 to 2.14.0rc2 in environment.yml and environment_osx.yml to ensure compatibility with latest features and fixes. - Commits: ffcd38edce6962b4cc400453b6e439ced95c89ab ("Use ESMValCore v2.14.0rc2" (#4372)). Major bugs fixed: - None reported this month. Overall impact and business value: - Improved runtime compatibility and reproducibility across Linux and macOS environments, reducing deployment risk and enabling smoother adoption of latest ESMValCore capabilities. - Aligns development and release pipelines with current core features, supporting downstream analyses and user workloads with fewer environment-related failures. Technologies and skills demonstrated: - Dependency management and environment configuration (YAML), version pinning, and commit-based traceability. - Cross-platform consistency (Linux/macOS) and preparation for upcoming features in ESMValCore.

Month 2025-09: Delivered CAMS CO2 fluxes CMORizer integration for ESMValTool, expanding data sources and enabling end-to-end processing of land and ocean CO2 fluxes. Implemented configuration files and download scripts to streamline CAMS data access, with integration ready for reproducible analyses within existing workflows. No major bugs reported; focused on reliability and maintainability of the new CMORizer.

June 2025 (2025-06) — Delivered the Recipe Documentation Figure Gallery feature for ESMValTool, enabling dynamic generation and presentation of figures within documentation. This included CSS styling and Python scripts to generate the gallery page, improving documentation clarity and reuse. No major bugs fixed this month; focus was on feature delivery, documentation polish, and tooling integration. This work enhances the business value by improving user experience and maintainability, with a foundation for scalable figure galleries across docs.

Month: 2025-05 – ESMValTool: deprecation of Julia-based diagnostics completed as part of the ongoing modernization and simplification of the toolchain. Key actions included retiring Julia recipes and diagnostic scripts by moving them to archive, updating the user-facing documentation to reflect retirement, and signaling deprecation within the ESMValTool workflow. The change is documented in commit 58fd0b8ece981bc97c4fbd213b11f2228d90db28 with message “Retire julia recipes (#4045)”.

March 2025 monthly summary for ESMValTool development focusing on ZEC diagnostic tool delivery. Implemented a new Zero Emissions Commitment (ZEC) diagnostic script and recipe enabling end-to-end analysis of temperature changes after net CO2 emissions cease across multiple climate models. The feature includes data processing, calculation, and visualization steps within the ESMValTool workflow. Commit reference: 0ba5622defc93f1a8d7c4cdaa8b5e1dfbd180255 ("Add recipe and diagnostic for ZEC (Zero Emissions Commitment) (#3897)").