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通过对安徽巢湖西岸杭埠河入口三角洲地区CH孔岩芯湖泊相沉积物的色度、磁化率及地球化学等古环境代用指标的分析与研究,揭示了巢湖地区早全新世时期(11.7~7.5cal.kaBP)的极端气候事件。研究表明:研究区11.7~7.5cal.kaBP期间沉积环境极不稳定,气候波动明显,并分别约在7.8cal.kaBP,8.6cal.kaBP,9.4cal.kaBP,10.5cal.kaBP,11.4cal.kaBP出现5次显著的冷干气候事件,且以8.6cal.kaBP与11.4cal.kaBP表现最为强烈,与我国冰芯、石笋及湖泊沉积物所记录的早全新世冷事件具有可比性,反映了巢湖湖泊沉积物对我国早全新世北半球中纬度地区的季风气候有明显的响应,这将为我国北半球早全新世气候波动的机理研究提供佐证。
Through the analysis and research on the paleoenvironmental proxy indexes of CH pore core and lake sediments in the delta of Hangbu River in the west bank of Chaohu Lake in Anhui Province, it is revealed that the Paleoclimate period (11.7 ~ 7.5 cal.kaBP) extreme weather events. The results show that the sedimentary environment is very unstable during the period of 11.7 ~ 7.5cal.kaBP in the study area and the climate fluctuates obviously, which are 7.8cal.kaBP, 8.6cal.kaBP, 9.4cal.kaBP, 10.5cal.kaBP and 11.4cal.kaBP respectively Five significant cold and dry climate events occurred, showing the strongest performance at 8.6cal.kaBP and 11.4cal.kaBP. Comparing with the early Holocene cold events recorded in China’s ice cores, stalagmites and lake sediments, The lake sediments have a clear response to the monsoon climate in the mid-latitude of the northern hemisphere in the early Holocene in our country, which will provide evidence for the study of the mechanism of climate fluctuation in the northern hemisphere during the early Holocene.