中文摘要：

利用四川卧龙亚高山暗针叶林岷江冷杉树木年轮样本资料,建立树轮宽度年表,对比宽度年表,提取树木年轮（简称树轮）碳稳定同位素（δ13C）序列和去趋势序列（DS）,研究岷江冷杉树轮碳稳定同位素序列对气候要素的响应关系。结果表明：岷江冷杉（1904—2009年）树轮碳稳定同位素变化范围为-23.33‰～-26.31‰,平均值为-24.91‰,变异系数为-0.025;相关分析表明,岷江冷杉δ13C序列（DS）与前一年11月和当年1月的月平均气温显著正相关（P≤0.05）,与前一年1月和当年2,11月的月平均气温极显著正相关（P≤0.01）,冬季平均气温对岷江冷杉树轮碳稳定同位素的响应最为敏感,是研究过去环境变化的良好载体,与当年1月降水量显著正相关（P≤0.05）,与全年的月平均相对湿度相关性不显著（P≥0.05）。

英文摘要：

The tree-ring stable isotope technique is an important means to reconstruct climate chronology and to determine tree responses to environmental factors. In this study, the tree-ring samples of Abies faxoniana, collected in 2010 in a sub-alpine forest of Wolong Sichuan, were used to develop the tree-ring width chronology and the stable carbon isotope was extracted based on the standard dendrochronology methods. This new approach can be used to establish the detrend series （DS） of stable carbon isotope of tree rings to eliminate effect of the 13C originated from atmospheric CO2. Results showed that the stable carbon isotope series （1904--2009） varied in a range of -23.33%-- -26.31% with the average value of -24.91%o and the coefficient of variation of -0. 025. Correlation analysis revealed that the tree-ring DS values were significantly positively correlated to the mean monthly temperature of the last January, and the February and November of the current year （P≤0. 01 ） , and was also correlated to the mean monthly temperature of the last November and the January of the current year （ P ≤0. 05 ）. The DS values were positively correlated to the January monthly precipitation of the current year （ P ≤0.05 ） , but displayed no significant correlation with monthly relative humidity. The most sensitive variable to influence the DS values was the winter temperature. It is concluded the stable carbon isotope of tree rings would provide crucial information for dendroclimate reconstruction in the warm and humid areas, and rational explanations about responses of tree rings to climate change in the subalpine dark forest in China.