---

作 者 ：蒋高明, 黄银晓, 万国江, 陈业材, 耿龙年, 曾毅强, 王宏卫

期 刊 ：植物生态学报 1997年 21卷 2期 页码：155-160

关键词：δ13C；大气CO2浓度；油松年轮；全球变化；

Keywords:δ13C, Atmospheric CO2 concentration, Tree rings, Pinus tabulaeformis, Global change,

摘 要 ：本文采样分析了承德市油松年轮中δ13C值自工业革命以来的变化，用以揭示我国北方大气CO2浓度的变化规律。结果表明：承德市油松年轮中的δ13C值自1810年以来平均下降了0.839‰，下降范围0.682‰～1.120‰，指示了大气CO2浓度逐渐升高的特点。δ13C值与历史时期全球大气CO2浓度之间存在显著相关关系(r＝ –0.5609,P<0.01)。应用树木年轮δ13C值与大气CO2浓度之间的关系式，推测出我国北方大气CO2浓度从工业革命以前的约278.4μmol·mol-1上升到目前的340μmol·mol-1。从而为我国的全球变化研究提供了CO2浓度历史变迁方面的证据。

Abstract:In the present paper, tree rings of Pinus tabulaeformis were sampled in the Summer Villa Estate of Chengde City, and their δ13C values were measured using a MAT-252 isotope ratio mass spectrometer, in order to reveal the historical changes of atmospheric CO2 in North China. The results show that, since 1810, the δ13C values in the tree rings of P. tabulaeformis have decreased by 0.839‰ with a range of 0. 682‰～1.120‰ ,indicating that the concentration of atmospheric CO2 has increased. There was a good linear correlation between the values of tree ring δ13C and the historical global atmospheric CO2 concentration (r = – 0.5609, p<0.01). By applying the formula of tree ring δ13C with concentration of atmospheric CO2, we estimated that CO2 concentration in North China has increased from 278.4 μmol·mol-1 in the preindustrialization to 340 μmol·mol-1 at present.

---