Comparative study on climatic change during later period of the late Pleistocene epoch with the sporopollen record from northwest Yunnan plateau and the stalagmite record from South China

Sporopollen analysis on the YXL profile in northwest Yunnan plateau is done by means of paleoclimate parameter methods, and changes in paleo-vegetation and paleoclimate during later period of the late Pleistocene epoch is reconstructed in combining with dating figures in the paper. Furthermore, comparative analysis with the stalagmite record from South China is done. The results show that, the process of paleoclimate change in plateau of Yunnan Province is moderate cool and a little dry - cold and dry - slightly warmer and wetter - cold and dry - warmer and wetter - cold and dry - warm and wet–moderate and a little dry-cool and a little dry from about 31570 cal. yr BP and there are some reversals in the process; YXL pollen record shows nearly same trend of Paleoclimate change contrast with the stalagmites record in the Dongge Cave and Hulu Cave, the climate events including H2, H1, YD, MWP, LIA appeared in the pollen record obviously; the process of warmer and wetter in YXL pollen record in Holocene seemed slower than that in the stalagmite records and ice core records, and in YXL pollen record the dry and cold climate last much longer, it is related with the high altitude environment and impacted by the Qinghai-Tibetan Plateau, showing some regional significance.