玉龙雪山不同海拔丽江云杉径向生长对气候变异的响应

张贇,尹定财,田昆,张卫国,和荣华,和文清,孙江梅,刘振亚

Radial growth responses of Picea likiangensis to climate variabilities at different altitudes in Yulong Snow Mountain, southwest China

Yun ZHANG,Ding-Cai YIN,Kun TIAN,Wei-Guo ZHANG,Rong-Hua HE,Wen-Qing HE,Jiang-Mei SUN,Zhen-Ya LIU

表2 年表统计参数及公共区间分析

Table 2 Statistics of ring-width chronologies and common interval analysis

统计特征 Statistic characters L M H 样本量(树/样芯) Sample depth (tree/radii) 25/50 31/62 29/58 序列长度 Time span (A.D) 1925-2016 1889-2016 1945-2017 EPS > 0.85起始年/样芯数 Year since EPS > 0.85/cores 1964/11 1901/7 1957/11 平均敏感度 Mean sensitivity 0.28 0.17 0.16 公共区间(1967-2016)分析 Common interval analysis (1967-2016) 标准差 Standard deviation 0.23 0.16 0.14 信噪比 Signal-to-noise ratio 10.1 44.9 13.0 样本总体代表性 Expressed population signal 0.91 0.98 0.93 第一主成分方差解释量 Variance in first eigenvector (%) 41.44 49.09 40.55