公元1450年以来巢湖湖泊沉积物与区域和全球气候变化对比研究

湖泊沉积物物理、化学和生物特征是反演区域古环境的有效载体。本文选择巢湖西湖区CH-1钻孔连续湖泊沉积物的粒度和磁化率数据,结合公元1450年以来该区域旱涝灾害文献资料和全球气候变化代用指标中的Intcal 98 ~（14）C同位素数据,对500 cala.BP以来巢湖流域古气候演变,特别是降水演替进行分析。研究表明1450-1949年间,巢湖流域降水变化经历了少-多-少-多的变迁,湖芯钻孔粒度、磁化率变化很好的响应了区域和全球气候变化,环境变化与人类活动密切相关。

Study on the Chaohu Lake Sediments and Comparison of Regional-global Climate Change Since 1450 AD

Lake Sediment physical, chemical and biological characteristics of inversion of the ancient environment of the region an effective carrier. This choice Chaohu Lake District CH-1 drilling continuous lake sediment grain size and magnetic susceptibility data, combined with the year 1450 floods and droughts in the region since the documents and proxy indicators of global climate change in the Intcal 98 ~（14）C isotope data, on the 500 cal a. BP paleoclimate evolution since the lake basin, particularly the succession of precipitation analysis, studies show that between 1450-1949, Chaohu Lake Basin precipitation experienced less-more-less-more changes, Lake drill core size, magnetic susceptibility a good response to changes in regional and global climate change, environment change and human activities are closely related.