Fig. 1From: Tree rings reflect growth adjustments and enhanced synchrony among sites in Iberian stone pine (Pinus pinea L.) under climate changeAnnual mean Palmer Drought Severity Index in south-west Spain, Central Portugal, and central-eastern Spain (the upper x-axis shows the years of the PDSI series). The dashed lines indicate 30-year moving averages centered in the mid-year of the window (the lower x-axis shows the 30-year windows of the moving averages)Back to article page