摘要
阿尔泰山是树轮气候研究的理想区域,但此前关于阿尔泰山不同海拔高度西伯利亚落叶松和西伯利亚云杉树轮宽度气候响应差异的对比研究较少。本文利用阿尔泰山上树线西伯利亚落叶松以及森林中下部西伯利亚云杉和西伯利亚落叶松树轮宽度资料,在建立宽度年表的基础上,分析阿尔泰山南坡不同海拔高度不同树种对气候响应的差异。研究结果表明:1上树线与森林中下部区域树轮宽度生长的气候限制因子不同,上树线落叶松树轮宽度生长的气候限制因子为6月平均温度,森林中下部云杉树轮生长的气候限制因子为年度(上年7月到当年6月)或春季(4—6月)降水量。2森林中下部云杉树轮宽度生长对降水的响应要优于落叶松。3上树线西伯利亚落叶松树轮宽度均与当年6月平均温度显著正相关(P<0.001),森林中下部西伯利亚落叶松的气候限制因子不明显。
The Altay Mountains are the optimum region for dendroclimatological research. In the region, few researches were conducted on the climate response difference of Larix Sibirica and Picea obovata Ledeb at different elevations in the Altay Mountains. In the paper, we established the treering width chronologies of Larix Sibirica and Picea obovata Ledeb for the different elevations and analyzed their response to climate. The results showed that, 1the limited climatic factor of tree ring radial growth is different at different elevations. In June temperature is the dominant factor of tree ring width of Larix Sibirica at the upper treeline and annual precipitation（from last July to current June） or spring precipitation（April to June） is the dominant factor to tree ring width of Picea obovata Ledeb from the middle to lower treeline. 2From the middle to lower treeline, the response of Picea obovata Ledeb to precipitation is better than Larix Sibrica. 3 The responses of tree ring width to climate of Larix Sibrica at different elevations are different. There is significant positive correlation（P〈0.001） between June temperature and tree ring width of Larix Sibrica at the upper treeline. From the lower to middle treeline, there is no evidently limited factor of the tree ring width of Larix Sibrica.
出处
《沙漠与绿洲气象》
2016年第1期59-67,共9页
Desert and Oasis Meteorology
基金
国家自然科学基金(41275120)
国家自然科学基金项目(41205070)
国家自然科学基金(40975056)
科技部公益性行业(气象)科研专项(GYHY201206014)
中国气象局气候变化专项(CCSF201438)
科技支撑项目(2012BAC23B01)共同资助
