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通过对太湖北部钻孔沉积物地球化学元素的测试分析,可以很好的反演太湖8 000年来沉积环境演变,大体可以分为4个阶段:1)8.0~6.6 kyr BP气候温暖湿润阶段;2)6.6~2.6 kyr BP气候趋冷及频繁波动阶段;3)2.6~1.5 kyr BP气候回暖阶段;4)1.5 kyr~现在,气候再次快速变冷阶段。认为两次暖湿阶段指示近8 000年来东亚季风两次明显的加强,此变化导致长江中下游湖泊在全新世期间两次明显的高水位期。
Through the analysis and analysis of the geochemical elements of borehole sediments in the northern Taihu Lake, the evolution of sedimentary environment in Taihu Lake for 8000 years can be well inverted and can be roughly divided into four stages: 1) 8.0 ~ 6.6 kyr BP climate warm and humid stage; 2 ) 6.6 ~ 2.6 kyr BP Climate cooling and frequent fluctuation phases; 3) 2.6 ~ 1.5 kyr BP climate warming phase; 4) 1.5 kyr ~ Now the climate is rapidly cooling again. It is considered that the two warm-wet periods indicate that the East Asian monsoon strengthened twice twice in the past 8,000 years. This change resulted in two significant high water periods during the Holocene in the middle and lower reaches of the Yangtze River.