δ2H, δ13C and δ18O from whole wood, α-cellulose and lignin methoxyl groups in Pinus sylvestris: a multi-parameter approach
δ2H, δ13C and δ18O from whole wood, α-cellulose and lignin methoxyl groups in Pinus sylvestris: a multi-parameter approach
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樟子松整木、α-纤维素和木质素甲氧基中的 δ2H、δ13C 和 δ18O：多参数方法
DOI：
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发表时间：
2015
影响因子：
1.3
通讯作者：
W. Werner
中科院分区：
文献类型：
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作者：
Maria Mischel;J. Esper;F. Keppler;M. Greule;W. Werner
新的树木年轮参数-甲氧基δ13C和δ2H -被开发用于重建古气候。然而，对来自整个木材和纤维素样品的δ13C和δ18O的测试表明，根据提取的木材成分，同位素组成和气候信号存在差异。我们通过分析(i)整个木材和纤维素的δ13C和δ18O以及（ii）甲氧基基的δ13C和δ2H来评估这种信号依赖性，使用生长在德国Altenkirchen附近的Pinus sylvestris L.。结果表明，全木、纤维素和木质素甲氧基的时间序列之间存在显著的相关性。与整个木材样品相比，甲氧基δ13C对气候参数的响应不同，且总体较低。另一方面，甲氧基δ2H与温度有较高的相关性，与环宽也有一定的相关性，表明其作为温度指标的潜力。与气候参数相关性最高的同位素时间序列为：(1)全木和纤维素δ13C与生长期降水和夏季气温的相关性最高；（ii）甲氧基与春季降水；（iii）全木和纤维素δ18O与年蒸散量和水分平衡相关；（iv）甲氧基δ2H随春季温度的变化。这些发现表明，不同的木材成分可以重建多个气候要素，并且全木材替代指标与纤维素时间序列具有可比性。
Novel tree ring parameters – δ13C and δ2H from methoxyl groups – have been developed to reconstruct palaeoclimate. Tests with δ13C and δ18O derived from whole wood and cellulose samples, however, indicated differences in the isotopic composition and climate signal, depending on the extracted wood component. We assess this signal dependency by analysing (i) δ13C and δ18O from whole wood and cellulose and (ii) δ13C and δ2H from methoxyl groups, using Pinus sylvestris L. growing near Altenkirchen (Germany). Results indicate significant correlations among the time series derived from whole wood, cellulose, and lignin methoxyl groups. Compared with the whole wood samples, δ13C from methoxyl groups showed a different and overall lower response to climate parameters. On the other hand, δ2H from methoxyl groups showed high correlations with temperature and was also correlated with ring width, indicating its potential as a temperature proxy. Isotope time series with the highest correlation with climatic parameter were: (i) whole wood and cellulose δ13C with growing season precipitation and summer temperature; (ii) methoxyl groups with spring precipitation; (iii) whole wood and cellulose δ18O correlates with annual evapotranspiration and water balance; and (iv) methoxyl group δ2H with spring temperatures. These findings reveal that multiple climate elements can be reconstructed from different wood components and that whole wood proxies perform comparably to cellulose time series.
影响因子：
2
作者：
Gori, Y.;Wehrens, R.;Camin, F.
通讯作者：
Camin, F.