Analysis scripts for asymmetric ocean--atmosphere coupling between Southeast Pacific and Southern Ocean cooling through circulation and sea-ice changes

This record archives paper-specific analysis scripts supporting the accepted Geophysical Research Letters manuscript "Asymmetric ocean--atmosphere coupling between Southeast Pacific and Southern Ocean cooling through circulation and sea-ice changes." The scripts cover public-data preprocessing, SST trend diagnostics, rolling cross-correlation analysis, persistence-plus-predictor machine-learning evaluation, and cross-basin predictive connectivity analysis. The original observational and reanalysis datasets are publicly available from the data providers cited in the manuscript and are not redistributed here.