Long-term Spatial and Temporal Variability of Precipitation,Evaporation, Soil Moisture and Runoff as Related to Drought Occurrence over Continental United States

树木年轮记录提供了最重要的数据之一 在时间尺度上重建过去气候变率的基础 几年到几十年。 该项目将合并900出版和 新的树木年轮记录在一个网格覆盖所有地区的 美国大陆，并将其与历史上的 每个网格单元的气候记录。 的关系 干旱发生和树木年轮生长之间的关系 确定并用于气候重建， 历史记录可以追溯到世纪。 这个项目的重要性在于它将重建 气候的空间和时间变化， 特别是过去北美的干旱 三个世纪 它将提供所需的信息， 评估气候变化的背景变率。 这 一个合作项目包括来自大学的研究人员 亚利桑那大学、阿肯色州大学和拉蒙特-多尔蒂大学 哥伦比亚大学地质观测站。

Tree ring records provide one of the most important data bases for reconstructing past climate variability on time scales of years to decades. This project will merge 900 published and new tree ring records in a grid covering all regions of the continental United States and compare them with the historical records of climate from each cell of the grid. The relationship between drought occurrence and tree ring growth will be determined and used for climate reconstructions back through the historical record to perhaps the 17th century. The importance of this project is that it will reconstruct both the spatial and temporal variability of climate, particularly drought occurrence, in North America during the past three centuries. It will provide the information needed to evaluate the background variability of climate change. This collaborative project includes investigators from the University of Arizona, the University of Arkansas, and the Lamont-Doherty Geological Observatory of Columbia University.