Reproducibility Package for "A 21-Year ERA5 Climatology of Persistent Contrail Formation Potential over Azerbaijan and the South Caucasus"

Abstract

This reproducibility package supports the manuscript “A 21-Year ERA5 Climatology of Persistent Contrail Formation Potential over Azerbaijan and the South Caucasus.” It contains the Google Colab notebooks used for ARCO-ERA5 data retrieval, quality control, persistent contrail formation potential calculations, climatological aggregation, statistical trend analysis, sensitivity testing, and figure production. It also includes machine-readable result tables, audit reports, figure files, and the final software-environment record. The analysis covers January 2005–December 2025 (252 complete months) over 38–44°N and 40–52°E at 0.25° horizontal resolution, eight pressure levels from 150 to 400 hPa, and eight 3-hourly UTC times per day. Persistent contrail formation potential was evaluated using the Schmidt–Appleman criterion and RHi thresholds of 100%, 110%, and 120%. Raw ERA5 fields are not redistributed. The package contains derived diagnostic and aggregated research outputs. The final automated audit passed all 33 checks.