新仙女木时期东亚冬季风百年尺度变化（过去12.9~11.7 ka）

通过中国黄土高原西部大地湾和巴谢两个高沉积速率的河流阶地黄土剖面，结合高分辨率光释光和AMS14C测年，利用粒度指标重建了新仙女木期间东亚冬季风变化历史。研究结果表明，东亚冬季风在新仙女木时期表现出持续的百年尺度振荡；同时，这种振荡在中期呈现出“转型”现象，即早期振荡幅度较大，而晚期相对较小。对比全球高分辨率的石笋、湖泊、海洋和冰心等记录发现，新仙女木期间大西洋经向翻转环流的逐渐恢复引起北大西洋海冰进退可能是造成东亚冬季风百年尺度振荡的主要驱动因素。

Based on two loess profiles from river terraces with high sedimentation rates at the Dawan and Baxi sections in the western Chinese Loess Plateau, combined with high-resolution optically stimulated luminescence (OSL) and AMS ¹⁴C dating, we reconstructed the variability history of the East Asian winter monsoon (EAWM) during the Younger Dryas using grain size proxies. Our results show that the EAWM exhibited persistent centennial-scale oscillations during the Younger Dryas; furthermore, these oscillations presented a "transition" phenomenon in the middle stage, with larger oscillation amplitudes in the early period and relatively smaller amplitudes in the late period. By comparing with global high-resolution records including stalagmites, lakes, marine sediments and ice cores, it is found that the gradual recovery of the Atlantic Meridional Overturning Circulation (AMOC) and the consequent advance and retreat of North Atlantic sea ice during the Younger Dryas were likely the primary driving factors for the centennial-scale oscillations of the EAWM.