CLIMATIC INFORMATION FROM O-18/O-16 ANALYSIS OF CELLULOSE, LIGNIN AND WHOLE WOOD FROM TREE RINGS
CLIMATIC INFORMATION FROM O-18/O-16 ANALYSIS OF CELLULOSE, LIGNIN AND WHOLE WOOD FROM TREE RINGS
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DOI：
10.1038/270708a0
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发表时间：
1977-01-01
期刊：
影响因子：
64.8
通讯作者：
THOMPSON, P
中科院分区：
文献类型：
--
作者：
GRAY, J;THOMPSON, P
测量树木年轮上的稳定同位素比率已被证明是确定过去气候的一种有前途的方法1 -5。最近的讨论集中在哪种木材成分提供最可靠的记录6，7。本文测定了生长于埃德蒙顿地区的一种白色云杉（Piceaglauca）的年轮纤维素、全木和木质素的氧同位素组成。利用气象记录，我们评估了树木年轮三种成分的18 O/16 O比值对季节温度的响应。结果表明，纤维素18 O/16 O比值与年平均温度有很高的相关性，全木18 O/16 O比值与年平均温度的相关性较差，但仍显著，而木质素18 O/16 O比值与年平均温度的相关性不显著。
MEASUREMENTS of stable isotope ratios on tree rings have proved a promising way of determinating past climate1–5. Recent discussions have centred on which component of wood provides the most reliable record6,7. We have measured the oxygen isotopic composition of cellulose, whole wood and lignin from tree rings in a white spruce (Picea glauca) which grew in the Edmonton area from 1882 to 1969. Using meteorological records we have evaluated the responses of the18O/16O ratios of the three components of the tree rings to seasonal temperatures. Results show a high correlation between cellulose18O/16O ratios and mean annual temperature, a poorer, though still significant correlation between whole wood18O/16O ratios and mean annual temperature and no significant correlation between lignin18O/16O ratios and mean annual temperature.