Site location and descriptive statistics of the 13 tree-ring chronologies.

Note: PIAB and ABAL are the species codes for Picea abies and Abies alba. NC and NT are cores and trees numbers, respectively. Chronology statistics include first-order serial autocorrelation (AC), mean sensitivity (MS), the variance explained by the first principal component (PC1), mean interseries correlation (rbar) and expressed population signal (Eps). All except AC are computed on the indexed tree-ring series and on the 1846–1995 common period. See Fig. 1 for site locations.注：PIAB与ABAL分别为欧洲云杉（Picea abies）和银冷杉（Abies alba）的物种代码。NC与NT分别代表样芯数与树木数。年表统计量涵盖一阶序列自相关（first-order serial autocorrelation, AC）、平均敏感度（mean sensitivity, MS）、第一主成分解释方差（first principal component, PC1）、序列间平均相关系数（mean interseries correlation, rbar）以及种群信号表达量（expressed population signal, Eps）。除AC外，其余统计量均基于标准化树轮序列及1846—1995年共同时段计算。样点位置详见图1。