Abstract: Precipitation over the southwestern United States exhibits distinctive seasonality, and contrasting ocean?atmospheric dynamics are involved in the interannual variability of cool- and warm-season totals. Tree-ring chronologies ...

Abstract: ncient blue oak trees are still widespread across the foothills of the Coast Ranges, Cascades, and Sierra Nevada in California. The most extensive tracts of intact old-growth blue oak woodland appear to survive on rugged ...

Abstract: Exactly dated tree-ring chronologies from ENSO-sensitive regions in subtropical North America and Indonesia together register the strongest ENSO signal yet detected in tree-ring data worldwide and have been used to reconstruct ...