New and Improved Tree-Ring Records of Climate from Siberia

该奖项将帮助制作两份西伯利亚高纬度地区过去2,000多年来的树木年轮气候记录。 将进行实地工作，从每个地点收集几百个活木样本（通过增量取样器和切割横截面）和残余材料样本（通过切割横截面）。 将对两份记录进行环宽测量、X射线显微密度测定和年表构建。 样品将被存档，以便将来进行实验室分析，如细胞尺寸和同位素分析。高分辨率的2,000年气候记录有可能提高我们对近千年来全球和北方半球温度变化的理解，以及20世纪世纪末的温暖是否不寻常。

This award will help produce two tree-ring records of climate from high-latitude sites in Siberia covering the last 2,000+ years. Field work will be undertaken to collect several hundred samples of live wood (by increment corer and cut cross sections) and relict material (by cut cross sections) from each locality. Ring width measurements, X-ray microdensitometry and chronology building will be performed on both records. Samples will be archived to allow for future laboratory analyses such as cell dimension and isotopic analyses.High resolution 2,000 year records of climate have the potential for improving our understanding of global and Northern Hemisphere temperatures variability over recent millennia and whether the warmth of the late 20th century was unusual.