黄土高原晚更新世的植被与气候环境

VEGETATION, CLIMATE AND ENVIRONMENT OF THE LOESS PLATEAU IN CHINA DURING THE LATE PLEISTOCENE

在被认为孢粉贫乏的黄土中分析出了大量孢粉，首次作出了黄土地层的孢粉浓度图式。根据１０余个剖面上孢粉组合的变化，阐明了晚更新世的植被与气候在时间上演替与空间上分布的规律，证明了各地植被在时间上的演变韵律十分相似，说明它们同受全球气候变化的控制，但同一时期在空间上各地植被不尽相同，此乃局地自然环境差异所致。根据植被变化重建了古气温曲线。

We have gained a lot of pollen and spore from loess, which are generally considered poor of them. Thus, we worked out several concentration pollen spore diagram in the loess sections for the first time. According to the variation of pollen spore assemblages on more than 10 sections, the evolutionary role in the time and distributionary role in space of the vegetation and the climate during the late Pleistocene have been expounded. The rhythm of the evolution of the vegetation in different places are very simillar, which proves the climatic variation of the loess plateau are controlled by the global climatic change. But the vegetation in different places are not the same, it is caused by the local natural environmental differences. At last, the paleotemperature curve of the loess plateau during the late Pleistocene has been reconstructed.