The East Asian Monsoon (EAM) is a regional factor affecting the East Asian climate and the oceanographic processes of the marginal seas along the Western Pacific. Finding proxies for the EAM intensity and reconstructing the interannual and interdecadal variations of the EAM using high-resolution records are necessary to improve our understanding of the EAM’s role in the global climate system and for predicting climate change. In this paper, high-resolution sedimentary records of sedimentary core C0702 obtained from the inner continental shelf of the East China Sea were comprehensively analyzed using a laser particle size analyzer, an ItraxTM core scanner, and a 210Pb and 137Cs radionuclide analyzer to explore potential proxies for the East Asian Winter Monsoon (EAWM). By combining the obtained results with instrumental observations of the EAM, we established a quantitative formula for the EAWM, which enables to reconstruct the evolution trend of the EAWM during the past 130 years. The sensitive grain-size component F2, with a grain-size range of 14.35–230 µm, and principal component PC1 of the sedimentary deposits of the East China Sea inner shelf can be used as EAWM proxies. The evolution of EAWM in 1880–1950 could be roughly divided into two stages: a weak EAWM period from 1882 to 1900 and a strong EAWM period from 1900 to 1945. This study improves our understanding of the variations in the EAWM on interannual and interdecadal temporal scales.

中文翻译：

---

过去100年东亚冬季风演化的定量重建：来自东海内陆架高分辨率沉积记录的证据

东亚季风（EAM）是影响东亚气候和西太平洋边缘海海洋过程的区域性因素。寻找 EAM 强度的代理并使用高分辨率记录重建 EAM 的年际和年代际变化对于提高我们对 EAM 在全球气候系统中的作用和预测气候变化的理解是必要的。本文利用激光粒度分析仪、ItraxTM岩心扫描仪、210Pb和137Cs放射性核素分析仪对东海内陆架沉积岩心C0702的高分辨率沉积记录进行综合分析，探索潜在的替代物。东亚冬季风（EAWM）。通过将获得的结果与 EAM 的仪器观测相结合，我们建立了EAWM的量化公式，可以重构EAWM在过去130年的演变趋势。东海内陆架沉积物的敏感粒度成分F2，粒度范围为14.35～230 μm，主成分PC1可作为EAWM的代表。1880-1950年EAWM的演变大致可分为两个阶段：1882-1900年弱EAWM期和1900-1945年EAWM强期。秤。东海内陆架沉积物的主成分PC1可作为EAWM的代表。1880-1950年EAWM的演变大致可分为两个阶段：1882-1900年弱EAWM期和1900-1945年EAWM强期。秤。东海内陆架沉积物的主成分PC1可作为EAWM的代表。1880-1950年EAWM的演变大致可分为两个阶段：1882-1900年弱EAWM期和1900-1945年强EAWM期。秤。