干旱区研究2012，Vol.29Issue(2)：328-334,7.
西伯利亚落叶松树轮稳定碳同位素对气候的响应
Response of Stable Carbon Isotope of Larix sibirica Ledeb. Tree-rings to Climate Change
摘要
Abstract
Stable isotopes in tree rings are the important approaches in climate reconstruction and in studies on tree response to environmental factors in the past,such as the maximum latewood density,tree ring width and other tree ring parameters.In this paper,the tree-ring samples of Larix sibirica Ledeb.collected in south slope of the Altay Mountains in 2009 were used to develop the tree-ring width chronology and stable carbon isotope series based on the standard Dendrochronology methods and stable carbon isotope research achievements.It can establish the de-trend series（DS） of stable carbon isotope of tree rings to eliminate atmospheric CO2 effect from original δ13C.The stable carbon isotope series values of L.sibirica tree rings varied in a range of-22.8‰——25.4‰,The average value was-24.0‰,and the coefficient of variation was-0.017.Width chronology and stable carbon isotope de-trend series were compared with monthly climatic factors（mean temperature,mean maximum temperature,mean minimum temperature,precipitation,relative humidity and sunshine duration） at Fuyun Meteorological Station.Correlation analysis revealed that there was a strong positive correlation between the stable carbon isotope de-trend series and the mean temperature and mean maximum temperature but a negative one between it and the relative humidity in growing season.The correlation coefficient between the de-trend series of stable carbon isotope and the monthly maximum temperature in June and July was as high as 0.611（P0.000 001）,that between it and the monthly relative humidity in June and July was-0.493（P0.001）,and that between it and monthly precipitation in July was-0.459（P0.01）.The response of stable carbon isotope of L.sibirica tree rings to temperature and relative humidity in growing season was the most sensitive.The main factor affecting stable carbon isotope of L.sibirica was the monthly maximum temperature in June and July.关键词
西伯利亚落叶松（Larix/sibirica/Ledeb.）/树木年轮/稳定碳同位素/气候响应/阿尔泰山Key words
Larix sibirica Ledeb./tree ring/stable carbon isotope(δ13C)/climate response/Altay Mountains分类
农业科技引用本文复制引用
张瑞波,袁玉江,魏文寿,尚华明,喻树龙,张同文,陈峰,范子昂,秦莉..西伯利亚落叶松树轮稳定碳同位素对气候的响应[J].干旱区研究,2012,29(2):328-334,7.基金项目
国家自然科学基金（40975056,41071072）国家自然科学重大基金（40890051）资助 （）
中国沙漠气象科学研究基金 （）
冰冻圈科学国家重点实验室开放基金 （）
科技部公益性行业（气象）科研专项 （）
中央级公益性科研院所基本科研业务费项目 （）
国家重点基础研究发展计划项目 （）
