北京平原东北部晚更新世晚期金鸡河一级阶地孢粉记录

Sporopollen Record in Jinji River Level Terrace during the Late Late Pleistocene in Northeast Beijing Plain

通过对北京平原东北部金鸡河左岸一级阶地的孢粉资料开展研究,并结合光释光测年数据,恢复北京平原东北部地区的古植被类型,分析晚更新世晚期北京平原东北部古气候变化。结果表明,北京平原东北部气候演化可分为三个阶段:第一阶段气候温凉干旱;第二阶段气候寒冷湿润;第三阶段气候较寒冷湿润。结果与前人研究结果有一定可比性。

Through studies and correlation of the first terrace of Jinji river in northeast of Beijing plain,and combined the studies with OSL datas,the climate and vegetation change of this area during the Later Pleistocene were analyzed. The results show that the process of the lefe first terrace was dicided into three stages,during the first stage,the climate was cold and dry,during the second stage,the climate was cold and wet,during the third stage,the climate was cold and wet. The result has certain comparability with other researchers＇ studying results.