摘要
Lacustrine sediments, especially those of the closed lakes in semi-arid and arid areas, preserve abundant information and hence the lakes serve as an indicator of climatic and environmental changes, characterized by its continuity, sensitivity and high resolution. Now the studies on lake environmental changes on different time scales have become an important basis for establishing global climatic model. In order to study the characteristics of
基金
Project partly supported by the National Natural Science Foundation of China.
