Overview for 2026-01: Delivered COARE3 roughness parameterization for ocean simulations in CliMA/ClimaCoupler.jl, enabling dynamic adjustment of surface roughness based on wind speed and wave state. The feature integrates across components to compute surface fluxes, substantially improving simulation accuracy under real-time conditions. No major bugs were fixed this month; focus was on feature delivery and integration. Business value: more accurate ocean-atmosphere coupling improves climate and forecast reliability, supporting better energy balance and risk assessment. Technologies/skills demonstrated: Julia development, cross-module integration, parameterization design, and version-controlled implementation.

November 2025: Delivered a focused surface-physics upgrade in CliMA/ClimaAtmos.jl by upgrading SurfaceFluxes to v0.14.1 to enable Charnock-parameterization and to remove the neutrally-stable boundary layer catch. This improves modeling fidelity and runtime stability, with a clear patch (commit 2321536eccee4db1aab4c155f9ad194a1974836d) for traceability. Business value includes more accurate surface flux representations, fewer edge-case failures, and smoother upgrade paths for future physics enhancements.

In August 2025, the ClimaAtmos.jl effort focused on enhancing user guidance and workflow reproducibility for debugging simulations. The main delivery was REPL script examples added to the ClimaAtmos documentation to streamline how users configure and run simulations, reducing debugging time and onboarding effort. No major bugs were reported or fixed this month; the work concentrated on documentation quality and developer UX. Overall, this milestone improves user productivity, accelerates time-to-value, and strengthens the reliability of debugging workflows in ClimaAtmos.