Comparisons of the three optimum seasonal assemblies of various climate elements for each of the STD chronologies.

Min. Tem.: monthly minimum temperature; Max. Tem.: monthly maximum temperature; PDSI: Palmer Drought Severity Index; SA: optimum seasonal assembly; R: correlation coefficient; H/MH/ML/L: the site code of the four different elevations (see Table 1); PC1: first principal component of the four chronologies; All: the composite chronology; P9-C3: previous September to Current March; 0.24/0.11: correlation coefficient with STD and RES chronologies, respectively.