乌兰布和沙漠晚第四纪以来环境演化研究进展

乌兰布和沙漠晚第四纪以来环境演化呈现湖泊与沙漠多次反复的更替模式,湖相层与松散风成砂层迭覆出现.湖泊发育时间段为120-90 ka、60-50 ka、40-20 ka和8-5.5 ka;沙漠扩展时间段为150-130 ka、90-60 ka、50-40 ka、20-10 ka和5.5 ka--近现代时期.由于时空尺度差...

Research progress on the quaternary environmental evolution in the Ulan Buh Desert

The evolution of the Ulan Buh Desert presented a multi-stage and repeated pattern， which was characterized by the overlapping of lacustrine layer and aeolian sand layer. A paleolake developed at 120-90 ka， 60-50 ka， 40-20 ka， and 8-5.5 ka， while the deserts expanded at 150-130 ka， 90-60 ka， 50-40 ka， 20-10 ka， and 5.5 ka-modern period. Due to the different spatiotemporal scale， tectonic activity， climate change and Yellow River change were the main reasons for the environmental evolution of the Ulan Buh Desert since the late Pleistocene. The Ulan Buh Desert had become a key area in northern China due to its drastic environmental changes. The further expansion of the desert was exacerbated by human activity in the late Holocene. Future research needs to accurately refine scientific issues and enrich spatiotemporal scale and scientific methods. These provide an accurate understanding of the complex process of desertification. It will play a key role in addressing climate change， promoting ecological progress and promoting sustainable regional development.