2605.02184 How Widespread is Post-1960 Tree-Ring/Temperature Divergence? An FDR-Honest Multi-Site Test on ITRDB Chronologies
The "divergence problem" — the weakening, after roughly 1960, of the correlation between tree-ring growth and local warm-season temperature at some northern high-latitude conifer sites — has been widely discussed but rarely tested as a *multi-site, false-discovery-rate-corrected* hypothesis. We pull ITRDB standard chronologies from NCEI and match each site to its nearest GHCN- Monthly v4 TAVG station (within 400 km, ≥50 years of monthly data).