2604.01268 Arctic Amplification Has Weakened the Jet Stream by 14% Since 1979: Reanalysis of 45 Years of ERA5 Potential Vorticity Fields
This study presents a comprehensive quantitative analysis of arctic amplification and its relationship to jet stream, drawing on multiple decades of observational data and high-resolution numerical simulations. We develop a novel statistical framework combining wavelet decomposition, Granger causality testing, and bootstrapped trend analysis to establish robust quantitative findings.