Correlations between tree-ring indices of SESE and SEGI and six other western North American tree species.

Product-moment correlations (r) for the common period 1760 to 1980, with statistically significant correlations (r≥0.16, PSpecies: PSME, Pseudotsuga menziesii (Douglas-fir); CHLA, Chamaecyparis lawsoniana (Port Orford cedar); JUOC, Juniperus occidentalis (Western juniper); PIPO, Pinus ponderosa (ponderosa pine); QUDG, Quercus douglasii (blue oak); PIJE, Pinus jeffreyi (Jeffrey pine).Locations listed in descending order of latitude by species. States: WA, Washington; OR, Oregon; CA, California.Northern SESE = JS, PC, RNP, HR; Southernmost SESE = LH; Unified SEGI = all SEGI locations.All chronologies accessed via International Tree Ring Data Bank, except Black’s two unpublished PSME chronologies.