Screening various variables of Cellular Anatomy of Scots pines in Subarctic Finland for Climatic Signals
Screening various variables of Cellular Anatomy of Scots pines in Subarctic Finland for Climatic Signals
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DOI：
10.1163/22941932-90000104
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发表时间：
2012
期刊：
影响因子：
1.9
通讯作者：
Jeong-Wook Seo;D. Eckstein;R. Jalkanen
中科院分区：
文献类型：
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作者：
Jeong-Wook Seo;D. Eckstein;R. Jalkanen
这项对芬兰亚北极地区樟子松的探索性研究旨在确定细胞解剖学和年轮变量中的气候信号(S)，如管胞直径和壁厚，或早材和晚材宽度。为此目的，从1961年至2008年，每年以增量核心计量这些变量，并相互比较。根据一些统计描述符(例如，表达的总体信号和平均敏感度)的低值，细胞解剖变量实际上不能被期望作为有用的气候指标。然而，事实证明，它们显著地反映了其他气候信号，而不是年轮变量。树轮变量在7月和8月对温度做出正响应，而细胞解剖学变量在生长季节之前的12月和1月对温度做出正响应。这些令人鼓舞的发现为进一步研究和扩大统计样本量提供了强有力的理由。
This exploratory study on Scots pine in subarctic Finland was aimed at identifying the climatic signal(s) ‘archived’ in cellular anatomy and tree-ring variables, such as diameter and wall thickness of tracheids, or early- and latewood width, respectively. For this purpose, these variables were measured in increment cores year by year from 1961–2008 and compared to each other. According to the low values of some statistical descriptors (e.g., expressed population signal and mean sensitivity) the cell-anatomical variables could, in fact, not be expected to be useful climatic proxies. Nevertheless, they turned out to significantly reflect other climatic signals than the tree-ring variables did. The tree-ring variables responded positively to temperature in July and August, whereas the cell-anatomical variables responded positively to temperature in December and January, prior to the growing season. These encouraging findings provide a strong rationale for further studies, and for enlarging the statistical sample size.