Module 4 project submission - Nick Ruprecht#30
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ATMS 523 – Module 4 Project Summary
This project uses ERA5 monthly mean data from 1979–2024 to analyze SST variability over the Pacific Basin (65°N to 65°S, 120°E to 60°W). SST and TCWV fields were masked over land and deseasonalized by removing monthly climatology. A linear detrending was applied to isolate anomalies, and SST anomalies were standardized for EOF analysis.
EOF decomposition revealed dominant modes of SST variability, with EOF1 strongly resembling the canonical ENSO pattern. The scree plot shows EOF1 explains the largest fraction of variance. Reconstructed SST anomalies for January 1998 closely match observed anomalies, validating the EOF approach.
Finally, a correlation map between EOF1’s principal component and TCWV anomalies shows strong coupling in the tropical Pacific, consistent with ENSO-driven atmospheric moisture variability.