浙江湘湖地区全新世孢粉记录及其古气候意义

依据钱塘江南岸跨湖桥全新世地层剖面的孢粉分析,结合14C测年以及沉积物岩性岩相特征,将浙江湘湖地区全新世早、中期(10～2.9kaB.P.)划分为3个古气候发展阶段。概述了孢粉组合、植被类型以及气候冷暖、干湿的交替、演化规律,并指出第Ⅱ气候阶段(7.7～5.0kaB.P.)相当于与全球变化相一致的全新世气候最适宜期,跨湖桥文化就是在这样的气候背景中孕育和发展的。本区全新世早期的气候变化与中国南方的深圳湾地区有很好的可比性。

Holocene sporopollen records in the Xianghu area, Zhejiang and their palaeoclimatic significance

Based on an analysis of sporopollen from the Kuahuqiao section on the south bank of the Qiantang River, combined with 14C dating results and lithlogic and petrographic characteristics of sediments, the early and middle Holocene (10-2.9 ka B.P.) in the Xianghu area, Zhejiang, is divided into three phases of palaeoclimatic development. A brief introduction is given to the sporopollen assemblages, vegetation types and cold-warm and dry-wet climatic alternations and evolution. It is pointed out that climate phase II (7.7-5.0 ka B.P.) was equivalent to the Holocene Hypsithermal or Climatic Optimum, which is in agreement with the global change, and it is in such a period that the Kuahuqiao culture was inoculated and developed. There is a good comparability between the early Holocene climatic change in the study area and that in the Shenzhen Bay area, southern China.