摘要
通过对巢湖AC2钻孔植硅体化石的系统研究,划分出3个植硅体组合带.并根据各植硅体组合带主要成分所反映的气候特征,结合主成分分析法(PCA),重构了该区近300a来的气候与环境变化.巢湖流域近300a来气候划分为2个相对温暖时期(1710s—1780s;1890s—1970s)、1个相对寒冷时期(1780s—1890s)和1个增温阶段(1970s—2003).与前人利用合肥地区的历史文献和长江中下游地区气象站的器测资料得出该区的气候变化进行了对比分析.
According to systematic research on the phytolith fossils in the sediment of core AC2 from the Caohu I.ake, three phytoliths zones were divided. Based on changes in the main compo nents in the phytolith zones and principal components analysis, the evolution of paleoenvironment and paleoclimate in the past 300 years was reconstructed. There are two warm periods（1770 s- 1780 s; 1890 s-1970 s）, one cold period（1780 s-1890 s）and one warming stage（1970 s-2003） in the last 300 years. The environment changes of each period in the Caohu lake area were further discussed, compared with the climate changes of the historical documents and instrumental data of Hefei and the mid lower reaches of the Yangtze River.
出处
《华东师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第4期71-76,共6页
Journal of East China Normal University(Natural Science)
基金
国家自然科学基金(40571006
40271107)
关键词
巢湖
植硅体
气候变化
Caohu lake
phytolith
climate change
