Chronology and Paleoclimatology of Chinese Loess Deposits

中国黄土序列提供了大陆上最重要的古气候记录之一。沉积的沉积物可以用来确定过去大气环流的许多方面，包括风强和风向，中国中部的降水和蒸发，以及大陆内陆气候与南亚季风的关系。与研究黄土层序相关的最困难的问题是建立准确的黄土沉积年代学。该提案要求支持继续分析沉积在这些层序中的沉积物的氨基酸、热释光和放射性碳年龄。在最初为期两年的拨款中，PIS注意到两种测年方法之间的一些相互矛盾的结果。这个项目很重要，因为它将解决这些差异，并制定一个准确的年表，这将对许多其他调查人员有用。

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.