Response of high-resolution sedimentary records to East Asian winter monsoon in the inner shelf of the East China Sea over the past 8 000 years

Through high resolution AMS¹⁴C dating and grain size analysis on upper layer sediments of the core D03 in the muddy area of inner shelf of the East China Sea, three sensitive grain groups were extracted and used as proxies of East Asian winter monsoon strength. During the past 8 ka, eleven millennium scale events and centennial scale rapid climatic events during 5.4～4.9 kaBP and in the past 1.8 kaBP were revealed. By comparison with records of other proxies from oxygen isotopes of stalagmites, ice cores and peat, it is indicated that the enhancement of East Asian winter monsoon in the study area was well correlated with the global cooling events, e.g. "8.2 ka", "4.9 ka", "3.8 ka","1.4 ka" and Little Icea Age.The inner relationship between the East Asian winter monsoon enhancement and the climate cooling event during the Holocene was established. The evolution of the East Asian winter monsoon in the past 8000 years can be roughly divided into three stages, including the intermediate and high frequency fluctuation stage during 8.2～4.8 kaBP, the weak and stable stage during 4.8～1.8 kaBP, and the high frequency fluctuations stage since 1.8kaBP.