Statistical characteristics of standard tree-ring chronologies for two species at 14 locations.

aMeasure of year-to-year variability of annual rings [46].bAverage correlation of every series to the master (excluding series in question) [46].cReflects prior year’s influence on current year’s growth [46].dCorrelation between tree-ring chronologies, representing strength of common variability [85].eDegree to which the chronology represents a hypothetical perfect chronology. Function of rbar and sample size, with 0.85 as a recommended cutoff for confidence [44], [85].Average tree-level statistics, using series >50 years with high and moderate crossdating confidence. Calculated using COFECHA.*Common period 1901–2000.