This paper presents geochemical and grain-size records since the early Holocene in core ECS0702 with a fine chronology frame obtained from the Yangtze River subaqueous delta front. Since ~9500 cal yr BP, the proxy records of chemical weathering from the Yangtze River basin generally exhibit a Holocene optimum in the early Holocene, a weak East Asian summer monsoon (EASM) period during the middle Holocene, and a relatively strong EASM period in the late Holocene. The ~8.2 and ~4.4 cal ka BP cooling events are recorded in core ECS0702. The flooding events reconstructed by the grain-size parameters since the early Holocene suggest that the floods mainly occurred during strong EASM periods and the Yangtze River mouth sandbar caused by the floods mainly formed in the early and late Holocene. The Yangtze River-mouth sandbars since the early Holocene shifted from north to south, affected by tidal currents and the Coriolis force, and more importantly, controlled by the EASM. Our results are of great significance for enriching both the record of Holocene climate change in the Yangtze River basin and knowledge about the formation and evolution progress of the deltas located in monsoon regions.

中文翻译：

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长江水下三角洲前沿保存的全新世早期东亚夏季风与河口沙洲沉积的联系

本文介绍了自全新世早期以来 ECS0702 核心的地球化学和粒度记录，并提供了从长江水下三角洲前缘获得的精细年代框架。自~9500 cal yr BP以来，长江流域化学风化的代理记录普遍表现出全新世早期全新世最适值，全新世中期东亚夏季风（EASM）弱期和全新世相对强EASM期。全新世晚期。~8.2 和 ~4.4 cal ka BP 冷却事件记录在核心 ECS0702 中。用粒度参数重构的早全新世以来的洪水事件表明，洪水主要发生在强东亚夏季风时期，洪水引起的长江口沙洲主要形成于全新世早期和晚期。全新世早期以来长江口沙洲由北向南移动，受潮汐流和科里奥利力的影响，更重要的是受EASM控制。我们的研究结果对于丰富长江流域全新世气候变化记录和了解季风区三角洲形成演化过程具有重要意义。