地理学报 ›› 2007, Vol. 62 ›› Issue (7): 742-752.doi: 10.11821/xb200707007

• 气候变迁 • 上一篇    下一篇

阿尼玛卿山地祁连圆柏径向生长对气候的响应

彭剑峰1,2, 勾晓华1, 陈发虎1, 张永香3, 刘普幸1,4, 张永1, 方克艳1   

  1. 1. 兰州大学西部环境教育部重点实验室中德干旱环境研究中心, 兰州730000;
    2. 河南大学环境与规划学院, 开封475004;
    3. 中国科学院青藏高原研究所, 北京100085;
    4. 西北师范大学地理与环境科学学院, 兰州730070
  • 收稿日期:2006-11-16 修回日期:2007-04-20 出版日期:2007-07-25 发布日期:2010-08-04
  • 通讯作者: 勾晓华副教授, E-mail: xhgou@lzu.edu.cn E-mail:xhgou@lzu.edu.cn
  • 作者简介:彭剑峰(1965-), 男, 河南邓州人, 在读博士, 主要从事环境变化和树木年轮研究。E-mail: jfpeng@lzu.edu.cn
  • 基金资助:

    国家自然科学基金项目(40671191);国家自然科学基金创新群体基金项目(40421101) 国家自然科学基金重 点项目(90502008)、教育部“新世纪优秀人才支持计划”(NCET-05-0888)和高等学校学科创新引智计划 (B06026) 资助

Hor izontal Var iations of Climatic Response of Qilian Juniper (Juniperus przewalskii) in the Anyemaqen Mountains

PENG Jianfeng1,2, GOU Xiaohua1, CHEN Fahu1, ZHANG Yongxian3, LIU Puxing1,4, ZHANG Yong1, FANG Keyan1   

  1. 1. Center for Arid Environment and Paleoclimate Research (CAEP), Key Laboratory of Western China's Environment Systems MOE, Lanzhou University, Lanzhou 730000, China;
    2. College of Environment and Planning, Henan University, Kaifeng, 475004, China
    3. Institute of Tibetan Plateau Research, CAS, Beijing 100085, China;
    4. College of Geography and Environment Sciences, Northwest Normal University, Lanzhou 730070, China
  • Received:2006-11-16 Revised:2007-04-20 Online:2007-07-25 Published:2010-08-04
  • Supported by:

    National Natural Science Foundation of China, No.40671191,No.40421101; Chinese NSFC Innovation Team Project (No.40421101), Program for New Century Excellent Talents in University (No.NCET-05-0888), Chinese 111 Project (No.B06026)

摘要:

通过对阿尼玛卿山地5 个坡面20 个祁连圆柏树轮宽度标准年表的分析, 发现公共区间内各树木年轮宽度标准年表中的信噪比SNR 和样本总解释量EPS 值都较高, 说明年表中都含有较强的环境信息; 树轮宽度年表之间的平均相关为0.35 (大多达到95%的置信程度), 具有较好的区域一致性。聚类分析使树木年轮宽度年表分成东、西两大部分, 而年表的第一主分量显示出: 西部树轮的指数序列明显长于东部即树木生长有自西向东扩展的趋势, 并且东、西区域树木生长变化的特征年变化具有同步性。东、西树轮宽度年表中第一主分量和第二主分量与气候因子的相关和响应都表现出一定的相似性, 但第二主分量对气候因子响应的差异性更显著。西部树木生长PCI 的主要限制因子是温度, 尤其当年春末夏初及前一年秋季温度影响最大, 同样降水也起着重要的作用, 西部树木生长PC2 的主要限制因子是降水量; 而东部树木生长PC1 主要受降水的制约, 第二主分量PC2 的响应分析显示出气候的滞后影响(树木前期生长) 是非常重要的限制因子。

关键词: 祁连圆柏, 树木年轮宽度年表, 聚类分析, 主成分分析, 气候响应

Abstract:

A spatiotemporal patterns analysis of a network with 20 Qilian juniper (Juniperus przewalskii) tree ring-width chronologies from 5 slopes along a west-east gradient in the Anyemaqen Mountains on the northeastern Qinghai-Tibetn Plateau was performed by means of chronology statistics. Higher SNR and EPS values implied the more climatic information in these chronologies. Most correlations among standard chronologies taken in pairs are significant, with the mean correlation coefficient for all sites being 0.35, indicating that environment condition was consistency. The result of Hierarchical Cluster Analysis showed two well-defined groups at large, corresponding to the two groups, the eastern and the western. Scatter plots of component loadings indicated that stands growing in a similar climate environment are most important on variability of radial growth. The first component of chronologies in east-west regions implied that the center of Qilian juniper (Juniperus przewalskii) growing transplants eastwards along the Anyemaqen Mountains and the eigenvalues (narrow years) tree-growth in the western and the eastern Anyemaqen were synchronous. Correlation between the first principal component (PC1) and the second principal component (PC2) and the climatic factors revealed similarity and differences in radial growth along the west-east gradient in the study area, nevertheless the difference of PC2 is more prominent. Temperature was the main limiting factor to tree growth PC1 in the western Anyemaqen, especially the impact of current late spring and early summer the most significant , and Precipitation was very importance to tree growth, but precipitation was mainly limiting factor of tree growth PC2. Temperature and precipitation held definite commutative.

Key words: Qilian juniper, ring-width chronology, cluster analysis, principal component analysis, climatic response