Chronology and Paleoclimatology of Chinese Loess Deposits

中国黄土序列提供了一个重要的 大陆上过去的气候记录。 沉积物 可以用来确定过去的许多方面 包括风的强度和方向的大气环流， 中国中部地区的降水和蒸发， 大陆内部的气候与 南亚季风 最困难的问题是 研究黄土序列是发展一个准确的年代学 黄土沉积 这一建议要求继续提供支助， 分析氨基酸热释光和放射性碳 这些层序中沉积物的年龄。 期间 最初的两年赠款，PI注意到一些矛盾的 测年方法之间的差异。 这个项目很重要 因为它将解决这些矛盾， 准确的年表，这将是有用的许多其他 investigators.

The China loess sequences provide one of the most important records of past climate on the continents. The sediments deposited there can be used to determine many aspects of past atmospheric circulation including wind intensity and direction, precipitation and evaporation in central China, and the relationship between climate in the continental interior and the south Asian monsoons. The most difficult problem associated with studying loess sequences is developing an accurate chronology of loess deposition. This proposal requests support to continue analyzing the amino acid, thermoluminescence, and radiocarbon ages of sediments deposited in these sequences. During an initial two-year grant, the PIs noted a number of contradictory results between the dating methods. This project is important because it will resolve these discrepancies and develop an accurate chronology which will be useful to many other investigators.