图5. 残差年表与气候因子的冗余分析(1952-2010)。只显示相关性显著的气候变量。向量越长表示气候因子越重要, 气候向量与年表向量夹角的余弦值代表年表与气候因子的相关系数。两者方向相同表示正相关, 方向相反表示负相关。数字表示月份, T, P分别表示气温和降水。L, 低海拔; M, 中海拔; H, 高海拔。

Fig. 5. Redundancy analysis between climatic factors and residual chronologies (1952-2010). Only significant climatic factors (p < 0.05) are shown. The longer vector of climate factor indicates the greater contribution; correlation coefficients between the climatic factors and the chronologies are illustrated by the cosine of the angle between the two vectors. Vectors pointing in the same directions indicate a positive correlation, and in opposite directions indicate a negative correlation. Numbers represent the corresponding months, and T and P indicate the temperature and precipitation, respectively. L, low altitude; M, intermediate altitude; H, high altitude.