地理学报 ›› 2009, Vol. 64 ›› Issue (9): 1103-1112.doi: 10.11821/xb200909008

• 气候变化 • 上一篇    下一篇

云南丽江树轮δ18O记录的大气环流变化信息

安文玲,刘晓宏,陈拓,徐国保,侯书贵,孙维贞   

  1. 中国科学院寒区旱区环境与工程研究所 冰冻圈科学国家重点实验室,兰州 730000
  • 收稿日期:2009-06-02 修回日期:2009-07-09 出版日期:2009-09-25 发布日期:2010-08-02
  • 作者简介:安文玲, 女。E-mail:wenlingan13@yahoo.com.cn
  • 基金资助:

    中国科学院方向性项目 (KZCX2-YW-317); 国家重点基础研究发展规划 (2007CB411506); 国家自然科学基金 (40871002)

Atmospheric Circulation Information Recorded in Tree-ring δ18O at Lijiang, Yunnan Province

AN Wen-ling,LIU Xiao-hong,CHEN Tuo,XU Guo-bao,HOU Shu-gui, SUN Wei-zhen   

  1. State Key Laboratory of Cryospheric Science,Cold and Arid Regions Environmental and Engineering Research Institute,CAS,Lanzhou 730000,China
  • Received:2009-06-02 Revised:2009-07-09 Online:2009-09-25 Published:2010-08-02
  • Supported by:

    Knowledge Innovation Project of Chinese Acadamy of Sciences, No.KZCX2-YW-317;National Basic Research Program of China (973 Program), No.2007CB411506;National Natural Science Foundation of China, No.40871002

摘要:

通过对云南玉龙雪山丽江冷杉年轮晚材纤维素氧同位素 (δ18O) 的分析,建立了1902-2004时段年分辨率的树轮δ18O序列。将所得序列与相邻的丽江市气象站记录的气候资料对比,分析了树轮δ18O对气候要素的响应。结果表明,丽江冷杉年轮晚材中的δ18O与其生长季气候因子密切相关。主要与季风期 (8-10月) 的降水和相对湿度、6-10月总云量、5-6月平均温度显著相关,尤其和总云量相关性最高 (r = -0.45,P = 0.01)。同时,树轮δ18O年际变化与南亚季风指数、东亚夏季风指数呈反相关关系,并与1-5月南方涛动指数负相关显著,在一定程度上反映了大尺度的大气环流影响。

关键词: 树轮, δ18O, 降水, 总云量, 相对湿度, 南亚季风, 东亚夏季

Abstract:

In this paper, tree-ring latewood stable oxygen isotope composition (δ18O) of Lijiang fir (Abies forrestii) was used to estimate the climatic response of tree-ring δ18O by comparing the δ18O values with meteorological records from Lijiang meteorological station. The annually resolved tree-ring δ18O chronology spans the period of 1902-2004. Results indicate that tree-ring δ18O values of latewood were significantly correlated with climate conditions during the growth season. Tree-ring δ18O was mainly correlated with precipitation and relative humidity of the wet season in summer (August to October). Temperature had a weak influence on the tree-ring δ18O, indicating a relatively high correlation with δ18O in May and June (r = 0.35), prior to the rainy season. The strongest correlation was found between the total cloud cover and tree-ring δ18O covering the whole wet season (June to October). Furthermore, tree-ring δ18O shows negative and significant correlations with South Asia monsoon index and East Asia monsoon index in different periods. Meanwhile, a strong correlation between tree-ring δ18O and SOI during the period of 1902-2004, to some degree, indicates that the tree-ring δ18O recorded a large amount of atmospheric circulation information.

Key words: tree-ring, δ18O, precipitation, total cloud cover, relative humidity, South Asia monsoon, East Asia summer monsoo