| 基于树轮资料重建祁连山东段冷龙岭1848年以来的干湿变化 |
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| 引用本文： | 侯迎,王乃昂,张学敏,程弘毅,路俊伟.基于树轮资料重建祁连山东段冷龙岭1848年以来的干湿变化[J].山地学报,2011,29(1). |
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| 作者姓名： | 侯迎 王乃昂 张学敏 程弘毅 路俊伟 |
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| 作者单位： | 兰州大学资源环境学院,甘肃兰州73000;兰州大学干旱区水循环与水资源研究中心,甘肃兰州730000 |
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| 基金项目： | 国家自然科学基金，国家基础科学人才培养基金项目 |
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| 摘 要： | 利用在祁连山东段冷龙岭青海云杉森林上限采集的树轮样芯,建立3个树轮宽度年表,与气象资料的响应分析发现,上年9月到当年4月的降水量是冷龙岭上限云杉生长的限制因子.基于多元回归模型重建本区1848年以来的降水量,重建模型的方差解释量达到45%,并用交叉检验验证了模型的稳定性.低通滤波序列显示冷龙岭过去近160 a经历了4次干期:1853-1857年,1877-1880年,1919-1931年,1974-1975年和4次湿润期:1869-1872年,1888-1892年,1950-1956年,1970-1972年.通过与祁连山中、西段的干旱序列对比得出,在较长的时间尺度上祁连山山区东、西降水的低频变化具有一致性.MTM(Multi-taper method of spectrum analysis)周期分析显示冷龙岭降水量存在40 a左右和2～3 a的显著周期,研究结果表明,ENSO循环和东亚季风对冷龙岭降水量有着重要影响.
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| 关 键 词： | 树轮 冷龙岭 干旱 |
Precipitation Reconstruction from Tree Ring Width over the Eastern Part of the Qilian Mountains, Northwestern China |
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| HOU Ying,WANG Naiang,ZHENG Xuemin,CHENG Hongyi,LU Junwei.Precipitation Reconstruction from Tree Ring Width over the Eastern Part of the Qilian Mountains, Northwestern China[J].Journal of Mountain Research,2011,29(1). |
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| Authors: | HOU Ying WANG Naiang ZHENG Xuemin CHENG Hongyi LU Junwei |
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| Institution: | HOU Ying,WANG Naiang,ZHENG Xuemin,CHENG Hongyi,LU Junwei(College of Earth and Environment Science,Lanzhou University,Lanzhou 730000,China) |
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| Abstract: | On the basis of tree-ring cores collected of Picea crassifolia from the timberline in Mt.Lenglonglin,three width chronologies were developed.Correlation analyses showed that the limiting factor of tree growth in the eastern part of Mt.Qilian was the precipitation from prior September to current April(PSA).Therefore,precipitation series was reconstructed during last 160 years according to a multiple regression model,and model's explained variance was 45%.The reconstructed drought series had obvious low-frequ... |
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| Keywords: | ENSO |
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