The variability of the East Asian monsoon (EAM) during the Holocene exhibits significant regional response, and its evolution needs further discussion. A well-dated, high-resolution sea-surface temperature record based on long-chain unsaturated alkenones, grain-size data, and clay mineral assemblages from the South Yellow Sea sediment is presented to investigate the sedimentary provenance and reconstruct the EAM over the past 9.5 ka. The results show that the sediments are most likely supplied by the Huanghe. The evolution of the East Asian summer monsoon (EASM) can be divided into three periods: strong and relatively stable conditions during 9.5–7.0 ka, weakened conditions during 7.0–1.5 ka, and strengthened conditions during 1.5–0 ka. The East Asian winter monsoon (EAWM) has experienced five periods: weakened conditions during 9.5–6.7 ka, weak and relatively stable conditions during 6.7–5.6 ka, strong and relatively stable conditions during 5.6–2.6 ka, strengthened conditions during 2.6–1.5 ka, and weak and stable conditions during 1.5–0 ka. Moreover, in-phase correlation was found between the EAWM and EASM at the orbital time scale in response to orbital-driven solar insolation, but out-of-phase correlation at a centennial time scale is predominantly associated with solar activity.

中文翻译：

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过去9.5 ka以来南黄海沉积物中东亚夏季风和冬季风的同相和反相行为

全新世东亚季风（EAM）的变率表现出显着的区域响应，其演变需要进一步讨论。基于来自南黄海沉积物的长链不饱和烯酮、粒度数据和粘土矿物组合，提出了一个年代久远的高分辨率海表温度记录，以研究过去的沉积物源并重建 EAM 9.5 卡。结果表明，沉积物最有可能由黄河供应。东亚夏季风（EASM）的演化可分为3个时期：9.5~7.0 ka的强相对稳定期、7.0~1.5 ka的弱化期和1.5~0 ka的强化期。东亚冬季风（EAWM）经历了五个时期：9.5-6.7 ka 期间的减弱条件，6.7~5.6 ka 弱相对稳定条件，5.6~2.6 ka 强相对稳定条件，2.6~1.5 ka 强化条件，1.5~0 ka 弱稳定条件。此外，在轨道时间尺度上发现EAWM和EASM之间的同相相关是响应轨道驱动的太阳日射，但在百年时间尺度上的异相相关主要与太阳活动有关。