中亚伊犁盆地粉尘堆积通量集成数据集（过去30 ka）

黄土有助于理解沙尘循环与气候变化之间的相互作用。然而，缺乏利用中亚黄土对粉尘堆积速率（MAR）变化的系统和区域尺度重建。基于10个黄土剖面的高分辨率释光测年，我们给出了中亚伊犁盆地东部过去30 ka的亚轨道尺度（此处为千年尺度）粉尘MAR集成记录。与基于单个地点的记录相比，在表示盆地尺度的粉尘堆积变化方面显示出明显的优势。伊犁盆地东部的集成结果表明，末次盛冰期MAR水平保持在高位，末次冰消期呈急剧下降趋势，全新世早期和中全新世早期略有下降，在晚全新世期间，MAR水平呈明显上升趋势。我们认为西伯利亚高压的变化主要调节了上述MAR变化。这些结果有效地将粉尘堆积与西伯利亚高压联系起来，表明在未来全球变暖情景下，伊犁盆地长期尺度上的粉尘活动可能减弱，也为中亚其他盆地粉尘堆积重建提供了重要参考。Loess plays a critical role in understanding the interactions between dust cycles and climate change. However, systematic and regional-scale reconstructions of dust mass accumulation rate (MAR) changes using Central Asian loess remain scarce. Based on high-resolution optically stimulated luminescence (OSL) dating data from 10 loess sections, we developed an integrated suborbital-scale (here defined as millennial-scale) dust MAR record spanning the past 30 ka in the eastern Yili Basin, Central Asia. Compared with single-site records, this basin-scale integrated record exhibits clear advantages in representing regional dust accumulation variability. The integrated results for the eastern Yili Basin show that MAR remained at high levels during the Last Glacial Maximum (LGM), dropped sharply during the Last Deglaciation, decreased slightly during the early Holocene and the early-middle Holocene, and increased significantly during the late Holocene. We argue that variations in the Siberian High primarily modulated the aforementioned MAR changes. These findings effectively link dust accumulation to the Siberian High, indicating that dust activity in the Yili Basin may weaken over long timescales under future global warming scenarios, and also provide a valuable reference for dust accumulation reconstructions in other Central Asian basins.