黄土高原（渭南、西峰和靖远剖面）冰期粒度和磁化率数据集（80 kyr BP以来）

中国黄土记录的东亚季风快速振荡被认为与北大西洋气候有着动态联系。然而，很少有人评估沉积后作用（例如，表面混合和成土作用）对黄土古气候记录的影响。本研究对黄土高原西部的厚层黄土进行了详细的光释光测年，为末次冰期沉积提供了可靠的年代学依据。研究了沿西北-东南横断面的三个黄土-古土壤序列的磁化率和平均粒径记录，以评价沉积后作用对这些基于黄土的指标的影响。研究结果表明：（1）末次冰期期间，黄土高原中西部平坦台地发育的黄土序列几乎是连续的；（2）沉积后作用对不同地区黄土序列记录的季风快速信号有明显影响。在黄土高原中部，季风快速信号根据沉积速率和成土强度的不同而不同程度减弱。然而，在黄土高原西北部，由于高沉积速率和相对较弱的成土作用，高分辨率的粒度振荡可靠地记录了季风的快速变化，并与格陵兰冰芯和葫芦洞石笋的快速气候变化有很好的相关性。

Rapid oscillations of the East Asian monsoon recorded in Chinese loess are thought to have dynamic links with North Atlantic climate. However, few studies have assessed the impacts of post-depositional processes (e.g., surface mixing and pedogenesis) on loess-based paleoclimate records. In this study, we conducted detailed optically stimulated luminescence (OSL) dating on thick loess deposits in the western Chinese Loess Plateau, providing reliable chronological constraints for Last Glacial sediments. We analyzed magnetic susceptibility and mean grain size records from three loess-paleosol sequences along a NW-SE transect to evaluate the effects of post-depositional processes on these loess-based proxies. The results of this study show that: (1) Loess sequences developed on flat plateaus in the central and western Chinese Loess Plateau are nearly continuous during the Last Glacial Period; (2) Post-depositional processes have significant impacts on the rapid monsoon signals recorded by loess sequences in different regions. In the central Chinese Loess Plateau, the rapid monsoon signals are weakened to varying degrees depending on sedimentation rates and pedogenic intensity; however, in the northwestern Chinese Loess Plateau, due to high sedimentation rates and relatively weak pedogenesis, high-resolution grain size oscillations reliably record rapid changes of the East Asian monsoon, which show good correlations with rapid climate changes recorded in Greenland ice cores and Hulu Cave stalagmites.