新疆阿勒泰地区近440年来大气δ13C变化

应用生态学报 ›› 2003, Vol. ›› Issue (9): 1469-1472.

新疆阿勒泰地区近440年来大气δ¹³C变化

陈拓¹, 秦大河¹, 刘晓宏¹, 任贾文¹, 李江风²

1. 中国科学院寒区旱区环境与工程研究所, 冰芯与寒区环境开放实验室, 兰州 730000;
2. 新疆气象科学研究所, 乌鲁木齐 830002

收稿日期:2001-03-27 修回日期:2001-11-07 出版日期:2003-09-15
通讯作者: 陈拓,男,1971年生,博士,主要从事树木年轮与全球变化研究,发表论文20余篇.E-mail:chentuo@ns.lzb.ac.cn.
基金资助:
中国科学院知识创新工程重大项目(KZCXI-10-02);中国科学院冰芯与寒区环境开放实验室知识创新工程资助项目(2105067)

Dynamics of atmospheric6 ¹³C in the past 440 years in Aleitai, Xinjiang

CHEN Tuo¹, QIN Dahe¹, LIU Xiao-hong¹, REN Jiawen¹, LI Jiangfeng ²

1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2. Xinjiang Institute of Meteorology, Urumchi 830002, China

Received:2001-03-27 Revised:2001-11-07 Online:2003-09-15

摘要/Abstract

摘要： 化石燃料的大量使用和森林的过度砍伐,引起大气中CO₂浓度的大幅度增加,同时由于Suess效应,大气CO₂中的δ¹³C在不断地下降。植物中δ¹³C的变化是大气CO₂浓度和同位素比值变化的敏感指示器。文中利用树木年轮δ¹³C序列和植物碳同位素分馏模型,尝试恢复了新疆阿勒泰地区近440年来大气δ¹³C的变化。结果表明,1850年之前,从树木年轮δ¹³C序列恢复的大气δ¹³C相对恒定在-6.60‰(R²=0.052),而1850年之后,该大气δ¹³C明显降低(R²=0.65),平均约为-7.04‰,平均年降低0.0084‰。这一结果高于从冰芯气泡所恢复的大气δ¹³C,1850年～1981年冰芯大气δ¹³C平均年降低约0.00657‰这可能与从树木年轮δ¹³C序列恢复的大气δ¹³C有更高的分辨率及树木生长点大气δ¹³C不同于全球大气δ¹³C值有关。

Abstract: Since industrial revolution, a large amount of anthropogenic CO₂ from fossil fuel combustion and deforestation has been emitted into atmosphere, and thus, the atmospheric CO₂ concentration increased rapidly, while the δ¹³C in atmospheric CO₂ became lower and lower due to Suess effect.Therefore, the prediction of δ¹³C is crucial for studying global changes.In order to make an accurate prediction, it is necessary to understand its historical variation.The dynamics of δ¹³C in plants can sensitively reflect it.In this paper, the dynamics of δ¹³C in atmospheric CO₂ in the past 440 years in Aleitai, Xinjiang were reconstructed by using tree-ring δ¹³C series and plant stable carbon isotope fractionation model.The results showed that atmospheric δ¹³C value was relatively constant before 1850 (R²=0.052), which was about -6.60‰, while a sharp decrease in atmospheric δ¹³C with an average of - 7.02‰ was found since 1850 (R²=0.65).Compared with those from ice core bubbles, more fluctuations were found in atmospheric 8 Cderived from tree-ring series, possibly due to the higher resolution of the latter, and the difference of real atmospheric δ¹³C between the growth site of the tree and the globe.

中图分类号:

P595
S718.5

陈拓, 秦大河, 刘晓宏, 任贾文, 李江风. 新疆阿勒泰地区近440年来大气δ¹³C变化[J]. 应用生态学报, 2003, (9): 1469-1472.

CHEN Tuo, QIN Dahe, LIU Xiao-hong, REN Jiawen, LI Jiangfeng . Dynamics of atmospheric6 ¹³C in the past 440 years in Aleitai, Xinjiang[J]. Chinese Journal of Applied Ecology, 2003, (9): 1469-1472.

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新疆阿勒泰地区近440年来大气δ¹³C变化

Dynamics of atmospheric6 ¹³C in the past 440 years in Aleitai, Xinjiang

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