Derivation and Analysis of Climatic Information from Tree-Rings

美国全球变化计划的一个重要目标是量化气候系统自然变异性的比率和范围。年际分辨率古气候资料的主要来源之一是对树木年轮厚度的分析。根据这些数据，我们有可能重建至少过去几个世纪，甚至过去一千年的气温和降水记录。这项更新建议是由一个已建立的树木年轮实验室提出的，要求支持继续制作和分析来自树木年轮的古气候数据。该项目的目标是量化树木年轮的厚度变化；将厚度变化与生态和气候参数联系起来；建立气候年变化的长期记录；并试图从气候的自然变化中分离出人为影响。这项研究很重要，因为它有助于将气候系统的自然变化与人类燃烧化石燃料的影响分离开来。

An important goal of the U. S. Global Change Program is to quantify the natural rate and range of variability i the climate system. One of the principal sources of paleoclimatic data with annual resolution comes from the analysis of tree ring thickness. From these data it is possible to reconstruct records of past temperature and precipitation for at least the last few centuries, and perhaps up for the last millennium. This renewal proposal, by an established tree-ring laboratory, requests support to continue the production and analysis of paleoclimatic data derived from tree rings. The goal of the project is to quantify the thickness variations in tree rings; relate the variations in thickness to ecological and climatological parameters; develop long-term records of annual variation in climate; and attempt to isolate anthropogenic effects from natural variations in climate. This research is important because it well help to isolate natural variability in the climate system from the effects of fossil fuel burning by man.