Incorporating Climatological Techniques to Improve Tree-Ring Site Selection in Complex Terrain
Incorporating Climatological Techniques to Improve Tree-Ring Site Selection in Complex Terrain
复制标题
结合气候学技术改进复杂地形中的树轮选址
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
E. Wise
中科院分区：
文献类型：
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作者：
E. Wise
树木气候学家经常在野外工作中重建一个特定的气候变量（如温度、河流流量、降水）。尽管存在物种和地点选择的指导方针，但在地形复杂或缺乏理想地点的地区，隔离感兴趣的信号是困难的。在本案例研究中，我建议采用气候学技术进行更有效的采样方案，并应用这些技术确定对落基山脉中北部冬季降水敏感地点的选择标准。这些技术包括利用国际树木年轮数据库（ITRDB）研究影响树木生长对气候的区域响应的因素，利用特征向量分析识别站点之间的变率模式，以及通过气候区划基于感兴趣的变量划定气候区域。研究结果表明，低海拔或中海拔的孟氏伪杉树样地应成为研究区冬季降水信号最大化的目标。影响生长的降水季节是站点间总体变率的主要组成部分。
Abstract Dendroclimatologists often approach field work with the intent of reconstructing a particular climate variable (e.g. temperature, streamflow, precipitation). Although guidelines exist for species and site selection, isolating the signal of interest is difficult in areas with complex terrain or a lack of ideal sites. In this case study, I suggest climatological techniques for a more efficient sampling scheme and apply these techniques to identify criteria for selecting sites sensitive to winter precipitation in the north-central Rocky Mountains. These techniques include examining factors influencing the regional response of tree growth to climate by utilizing the International Tree-Ring Databank (ITRDB), using eigenvector analyses to identify modes of variability between sites, and delineating climate regions based on the variable of interest through climate regionalization. Results suggest that low- or mid-elevation Pseudotsuga menziesii sites should be targeted for maximizing the winter precipitation signal in the case study area. The season of precipitation impacting growth was found to be a major component of the overall variability between sites.