中文摘要：

基于建立的大兴安岭库都尔地区兴安落叶松树轮宽度年表,分析了兴安落叶松树轮宽度年表与该区温度、降水和帕尔默干湿指数（PDSI）等主要气候因子之间的关系.结果表明：研究区5月和7月的温度与兴安落叶松年轮宽度变化呈极显著负相关关系（P〈0.01）;虽然降水与年轮宽度变化没有表现出显著的相关关系,但6—8月PDSI与年轮宽度变化显著相关（P〈0.05）,说明兴安落叶松的生长明显受区域水热条件共同控制,且以5月和7月最显著.兴安落叶松树轮宽度年表与诸如太平洋年代际振荡（PDO）等大尺度气候系统波动的低频系数和高频系数之间呈显著相关,说明太平洋气候系统的波动对该区树木径向生长具有显著影响.

英文摘要：

Based on the established tree-ring width chronology of Larix gmelinii in Kuduer,Great Xing’an Mountains,this paper analyzed the relationships between L.gmelinii tree-ring width chro-nology and related climatic variables,including air temperature,precipitation,and PDSI.In the study area,the L.gmelinii tree-ring width chronology was significantly negatively correlated with the air temperature in May and July（P〈 0.01）,had no significant correlation with precipitation,but significantly positively correlated with the PDSI in June-August（P 〈0.05）,suggesting that hydro-thermal variables had significant coupling effects to the radial growth of L.gmelinii in its growth season,particularly in May and July.The L.gmelinii tree-ring width chronology had signifi-cant correlations with large scale climatic regimes such as the Pacific Decadal Oscillation（PDO） in both low and high frequency variations,illustrating the significant effects of the remote oceanic cli-matic regimes to the local tree growth.