用树轮碳同位素年序列重建大气二氧化碳浓度  

Restructing CO_2 Concentration by the Tree ring Carbon Isotopic Ratios of West Tianmu Mountain

作　　者：唐劲松[1] 钱君龙[1] 尹卓思 杨逢春 

机构地区：[1]中国科学院南京地理与湖泊研究所湖泊沉积与环境开放实验室,南京210008 [2]南京鼓楼区园林绿化管理所 [3]浙江天目山国家自然保护区管理局

出　　处：《南京林业大学学报（自然科学版）》2000年第3期45-48,共4页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家自然科学基金资助项目! (No .497710 0 1)

摘　　要：大气圈CO2 浓度及其同位素组成是不断变化的。植物在同化大气CO2 过程中产生碳同位素分馏 ,因此 ,树轮中稳定碳同位素比值 ( 13C/12 C)不仅是重建古气候的工具 ,也是过去大气CO2 浓度变化的敏感指示器。利用采自浙江西天目山的两株柳杉树轮稳定碳同位素 (δ13C)组成年序列 ,对 1 9世纪中叶以来大气CO2 浓度变化进行重建 ,其重建值与大气CO2The stable carbon isotopic compositions of tree ring have been explored to study paleoclimatic variations, past atmospheric CO 2 level, and global carbon cycle. This paper analyzed the carbon isotopic ratios of two cryptomeria , collecting from West Tianmu Mountain, Zhejiang, and studied the tree ring carbon isotopic ratios evidence, for the atmospheric CO 2 concentration change after Industrial Revolution. The calculation of CO 2 construction fits well with the records. The tree ring carbon isotopic ratios well records the atmospheric carbon ratios change, which provides a good evidence for the CO 2 changes and a new means for the study on atmospheric CO 2 changes.

关 键 词：树轮 稳定碳同位素 二氧化碳浓度 年轮 环境 

分 类 号：P532[天文地球—古生物学与地层学]