Pearson correlation coefficients (1956–2011) between STD chronologies and optimal seasonal precipitaiton and temperature and the same correlations using first-order differential series.

R: correlation coefficient; Rac1: correlation coefficient of the first-order differential series. H, MH, ML, L, All are site codes for different elevations (see Table 1). Precipitation (P7-C6) is the accumulated precipitation from previous July to current June. Temperature (P12-C2) is the mean temperature from previous December to current February.R：相关系数（correlation coefficient）；Rac1：一阶差分序列的相关系数。H、MH、ML、L及All均为不同海拔的站点代码（site codes），详见表1（Table 1）。降水（P7-C6）指前一年7月至当年6月的累积降水量；气温（P12-C2）指前一年12月至当年2月的平均气温。