Climatic changes on millennial time scales: Evidence from a high-resolution loess record

摘要

Studies on a high resolution loess section in Huining County reveal that the behavior of climate shows high instability during the last glaciation. Results reflect that climate in Loess Plateau oscillates on millennial time scales during the last glacial period. These can be teleconnected with the records of Dansgaard-Oeschger cycles and Heinrich events in high latitudes. Results also demonstrate that variations in the intensity of wind regime on the Loess Plateau have a close correlation with the changes of global ice sheets volume. All these suggest that two-level forcings may drive climate changes in central Asia. The first level is the volume changes of ice sheets and the second level with short time scales is superimposed upon the first level on a nearly global scale.