Mean annual temperatures of mid-latitude regions derived from δ2H values of wood lignin methoxyl groups and its implications for paleoclimate studies.

Mean annual temperatures of mid-latitude regions derived from δ2H values of wood lignin methoxyl groups and its implications for paleoclimate studies.
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由木材木质素甲氧基基团δ2H值得出的中纬度地区年平均气温及其对古气候研究的影响

DOI:
10.1016/j.scitotenv.2016.07.189
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发表时间:
2017
期刊:
The Science of the total environment
影响因子:
--
通讯作者:
Keppler
Keppler
中科院分区:
--
文献类型:
--
作者:
Anhäuser;Greule;Keppler

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树木年轮是广泛使用的气候档案,提供百年至千年时间尺度的年度决议。树木年轮的稳定同位素比率已被用来协助划定温度和降水等气候参数。在这里,我们研究了从欧洲沿沿着约3500 km南北样带收集的不同树种木材的木质素甲氧基的稳定氢同位素比(以δ 2 H值表示),年平均温度(MAT)为− 4至+ 17 °C。结果表明,木材木质素甲氧基的MATs与δ2H值之间存在较强的线性关系。我们使用这种关系来预测随机收集的木材样本的MAT,并发现预测和观察到的MAT之间的一般协议在全球范围内的中纬度地区。我们的研究结果进行了讨论的背景下,其古气候的相关性,并建议,木质素甲氧基的δ2H值可能有潜力重建MATs时,中纬度的树木年轮年表的晚全新世。
Tree-rings are widely used climate archives providing annual resolutions on centennial to millennial timescales. Stable isotope ratios of tree-rings have been applied to assist with the delineation of climate parameters such as temperature and precipitation. Here, we investigated stable hydrogen isotope ratios (expressed as δ2H values) of lignin methoxyl groups of wood from various tree species collected along a ~ 3500 km north-south transect across Europe with mean annual temperatures (MAT) ranging from − 4 to + 17 °C. We found a strong linear relationship between MATs and δ2H values of wood lignin methoxyl groups. We used this relationship to predict MATs from randomly collected wood samples and found general agreement between predicted and observed MATs for the mid-latitudes on a global scale. Our results are discussed in context of their paleoclimate relevance and suggest that δ2H values of lignin methoxyl groups might have the potential to reconstruct MATs when applied on mid-latitudinal tree-ring chronologies of the Late Holocene.
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