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δ13C Circumferential Variation in Tree-rings α-Cellulose and Its Climatic Implications
Author(s): 
Pages: 14-18
Year: Issue:  1
Journal: JOURNAL OF NANJING FORESTRY UNIVERSITY(NATURAL SCIENCE EDITION)

Keyword:  树轮α-纤维素δ13C角分布;
Abstract: 利用从中国天目山和庐山采集的4株树轮样,分析了树轮沿不同方位δ13C的变化特点,讨论了角分布的成因.结果表明,树轮在不同方位上的木质α-纤维素δ13C值不同,而且各方位上δ13C的差异与分析期间历年平均值的年际差异在量级上大致相当.对各方位δ13C作方差分析表明,各方位存在显著性差异,说明δ13C的角分布具有独立意义.对其中一棵柳杉树轮δ13C角分布与气候要素的相关分析表明,不同方位的δ13C值与年、季节和月降水及温度相关,从而使树轮可记录信息分辨率提高、信息量增大.用树轮δ13C的角分布重建的气候要素更能反映气候要素的实际变化情况.
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