Abstract: In this paper the palynological data from six drill sections in the eastern North China plain are analysed by using the pattern recognition (stereopicture). The late Pleis-tocene-Holocene stratigraphy is divided into five sporo-pollen complex zones and seven sporo-pollen complex subzones. Nine stages of evolution of sporoflora are established. On the basis of these data in combination with ecological characteristics of the flora, a climatic evolution in the region for 20000 years is discussed and nine climatic phases are determined. It is found that there were eight apparently decreasing temperature stages and seven increasing temperature stages in the climatic evolution since the Holocene, and their fluctuation cycles are 2500 and 1000 years, respectively.

Key words: Late Pleistocene, Holocene, Sporo-pollen sequence, Climatic period, North China plain

摘要： 本文应用图象识别方法,对华北平原东部地区(宝坻—濮阳)的五口井和一个剖面的孢粉资料进行了研究,将本区晚更新世晚期一全新世地层划分为五个孢粉组合带,七个孢粉组合亚带,共建九个孢粉植物群演化阶段。在此基础上根据植物生态特征,探讨了两万年以来的气候演变,确立了九个气候期,并发现全新世以来气候变化具有八次明显的降温及七次升温过程,存在着二千五百年及千年左右的波动周期。

关键词: 晚更新世, 全新世, 孢粉序列, 气候期