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| 采点和去趋势方法对天山西部云杉上树线树轮宽度年表相关性及其气候信号的影响 | |
| 引用本文： | 袁玉江,魏文寿,ESPER Jan,喻树龙,张瑞波.采点和去趋势方法对天山西部云杉上树线树轮宽度年表相关性及其气候信号的影响[J].中国沙漠,2008,28(5):809-814. |
| 作者姓名： | 袁玉江 魏文寿 ESPER Jan 喻树龙 张瑞波 |
| 作者单位： | 1. 中国气象局乌鲁木齐沙漠气象研究所/中国气象局树木年轮理化研究重点开放实验室,新疆,乌鲁木齐,830002;瑞士联邦森林、雪、景观研究院,瑞士,苏黎世,比尔门斯多夫,8903 2. 中国气象局乌鲁木齐沙漠气象研究所/中国气象局树木年轮理化研究重点开放实验室,新疆,乌鲁木齐,830002 3. 瑞士联邦森林、雪、景观研究院,瑞士,苏黎世,比尔门斯多夫,8903 |
| 基金项目： | 科技部基础性工作项目，科技部气象行业专项，中国气象局资助项目 |
| 摘 要： | 针对新疆天山西部伊犁、博州三大山体北坡云杉上树线树木年轮资料,采用区域曲线、负指数曲线、样条函数三种不同生长去趋势方法,研制树轮宽度年表,分析不同采点和树轮去趋势方法对树轮宽度年表在不同频域的相关性及气候信号的影响发现：①采点间的距离和是否位于同一气候区是影响云杉上树线树轮宽度年表间相关性的首要因子。三个采点间的树轮宽度变化,在高频变化方面最为相似,低频变化存在着较大差异,表明它们在揭示和重建大范围的高频气候变化方面可能具有较大的应用潜力。②三种不同去趋势方法对天山西部山脉北坡上树线的云杉树轮宽度年表的研制具有一定影响,负指数和样条函数去趋势方法研制的树轮年表较为相似,而区域曲线去趋势方法研制的树轮宽度年表中则可保留较多的轮宽低频变化信息。③降水是天山西部云杉上树线的树轮宽度生长的主要限制因子,且树轮宽度生长对降水的响应具有显著的滞后性。④在天山西部的云杉上树线采点,使用区域曲线去趋势方法有利于在树轮宽度年表中保留较多的与水分有关的气候信息。 |
| 关 键 词： | 新疆天山西部 云杉树轮宽度 不同采点 不同去趋势方法 气候信号 |
| 收稿时间： | 2007-9-8 |
| 修稿时间： | 2007-11-18 |
Influence of Sampling Site and Detrending Method on Correlations and Climate Signals of Spruce Tree-ring Width Chronologies at Upper Tree Line in Western Tianshan Mountains of Xinjiang |
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| YUAN Yu-jiang,WEI Wen-shou,ESPER Jan,YU Shu-long,ZHANG Rui-bo.Influence of Sampling Site and Detrending Method on Correlations and Climate Signals of Spruce Tree-ring Width Chronologies at Upper Tree Line in Western Tianshan Mountains of Xinjiang[J].Journal of Desert Research,2008,28(5):809-814. | |
| Authors: | YUAN Yu-jiang WEI Wen-shou ESPER Jan YU Shu-long ZHANG Rui-bo |
| Institution: | 1.Institute of Desert Meteorology, CMA, Urumqi 830002, China; Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration, Urumqi 830002, China; 2.Swiss Federal Research Institute WSL Birmensdorf 8903, Zurich, Switzerland |
| Abstract: | Based on the tree-ring width data of spruce from the upper tree lines on northern slope of western Tianshan Mountains in Yili and Bozhou region of Xinjiang, the tree-ring width chronologies were developed by using the three different detrending methods, i.e. regional curves, negative exponential curves (no positive slope) and 300-year fixed splines. Analyses on the effect of different sampling sites and different detrending methods on correlation between tree-ring width chronologies in different frequency domains and their climate signals showed: ①Distance between two sampling sites and whether chronologies are in the same climate area are import factors that influence the correlation between two tree-ring width chronologies. There are better similarity in the higher frequency domain and greater different in the lower frequency in the changes of tree-ring width at the three different sampling sites, which implies that the tree-ring width chronologies maybe possess large potential in application for disclosing and reconstructing the climate change of higher frequency domain on large scale. ②The tree ring width chronologies developed from Negative Exponent and Spline Detrending methods are similar, but that developed from Regional Curve Detrending Method can remain more information of tree ring width change on lower frequency domain. ③Precipitation is the first limiting factor that influences the tree ring width growth of spruce on upper tree line in the western Tianshan Mountains and the effect has obvious hysteresis. ④Regional curve detrending method can keep more moisture information in the tree ring width chronology of spruce on upper tree line in the western Tianshan Mountains of Xingjiang. |
| Keywords: | western Tianshan Mountains of Xinjiang tree-ring width chronology of spruce sampling site detrending method climate signal |
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