| 云南丽江树轮δ18O记录的大气环流变化信息 |
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| 引用本文： | 安文玲,刘晓宏,陈拓,徐国保,侯书贵,孙维贞.云南丽江树轮δ18O记录的大气环流变化信息[J].地理学报,2009,64(9):1103-1112. |
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| 作者姓名： | 安文玲 刘晓宏 陈拓 徐国保 侯书贵 孙维贞 |
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| 作者单位： | 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 |
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| 基金项目： | 中国科学院方向性项目，国家重点基础研究发展规划，国家自然科学基金 |
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| 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。
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| 关 键 词： | 树轮 δ18O 降水 总云量 相对湿度 南亚季风 东亚夏季 |
| 收稿时间： | 2009-06-02 |
| 修稿时间： | 2009-07-09 |
Atmospheric Circulation Information Recorded in Tree-ring δ18O at Lijiang, Yunnan Province |
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| AN Wenling,LIU Xiaohong,CHEN Tuo,XU Guobao,HOU Shugui,SUN Weizhen.Atmospheric Circulation Information Recorded in Tree-ring δ18O at Lijiang, Yunnan Province[J].Acta Geographica Sinica,2009,64(9):1103-1112. |
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| Authors: | AN Wenling LIU Xiaohong CHEN Tuo XU Guobao HOU Shugui SUN Weizhen |
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| Institution: | State Key Laboratory of Cryospheric Science;Cold and Arid Regions Environmental and Engineering Research Institute;CAS;Lanzhou 730000;China |
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| 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. |
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| Keywords: | tree-ring δ18O precipitation total cloud cover relative humidity South Asia monsoon East Asia summer monsoo |
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