摘要
树轮作为自然档案中的一种， 其同位素研究是较为新颖的领域文章比较系统地从树轮纤维素的提取、氧的来源、植物体内氧的分馏、与温度变化的关系等４ 个方面评述了树轮纤维素氧同位素组成的气候学意义已有的研究结果表明， 树轮纤维素氧同位素组成的变化是温度变化的良好载体， 但在定量恢复古温度变化时遇到了不少限制，
The information of environmental and climatic change disclosed from many natural systems is the base of the current study of environmental and climatic history Among them, tree rings have the favourable advantage of accurate dating, good continuity, high resolution and good climatic sensitivity Therefore study of tree ring cellulose isotope has been carried out since 1970, more and more evidence shows that the isotopic analysis of tree ring cellulose is an important tool of paleoenvironmental and paleoclimatic research Here climatic significance of oxygen isotopic composition in tree ring cellulose is overviewed from four aspects, including extraction of tree ring cellulose, the oxygen source and fractionation in plant and recent research achievements etc The results show that variation of oxygen isotopic composition in tree ring cellulose is a good paleothermeter, but there are some constraints in quantitative reconstruction of the past temperature changes, so the fractionation models need to be further perfected
出处
《冰川冻土》
CSCD
北大核心
1999年第3期207-212,共6页
Journal of Glaciology and Geocryology
