Derivation and Analysis of Climatic Information from Tree-Rings

这一奖项是为了资助哥伦比亚大学拉蒙特-多尔蒂地质天文台树轮实验室的树枝气候研究。研究将集中于从位于北美高纬度地区(主要是对温度敏感)和美国东部(主要是对湿度敏感)的地点的树木获得气候信息。这项研究的主要目标是：(1)扩大对北方树木年轮系列和由此产生的气候重建的分析；(2)在南北方向上扩大该地区树木的采样密度；(3)继续发展X射线密度测量技术；(4)利用来自卫星数据的树木年轮指数和归一化差异植被指数之间的相关性，研究二氧化碳/气候/生物圈的关系；(5)对南美洲的树木年轮系列进行有限的开发。这项工作将通过各种树木年轮分析技术对气候系统行为进行定量重建。由此产生的数据将成为校准气候系统数值模型和检验关于十年至世纪时间尺度上气候变化的科学假设的基础。

This award is for funding of dendroclimatic research at the Tree-ring Laboratory of Lamont-Doherty Geological Observatory at Columbia University. Research will concentrate on the derivation of climatic information from trees at sites located in North American high latitudes (primarily temperature sensitive) and at sites in the eastern United States (primarily moisture sensitive). The main objectives of the research are: (1) to expanded the analyses of the boreal tree-ring series and derived climatic reconstructions, (2) expand, in a north-south direction, the sampling density of trees for this region, (3) continue development of X-ray densitometric techniques (4) study C02/climate/biosphere relations using correlations between tree- ring indices and normalized differences vegetation index derived from satellite data, and (5) undertake limited development of tree-ring series from South America. This work will allow quantitative reconstruction of the climate system behavior through various tree-ring analyses techniques. The resulting data would be the basis against which numerical models of the climate system can be calibrated and scientific hypotheses regarding climatic changes on decadal-to-century time scales be tested.