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.