近日，兰州大学陈发虎团队报道了大气系统驱动了过去13万年亚洲地区尘埃和湿度变化的时空差异。相关论文于2026年3月13日发表在《科学-进展》杂志上。

亚洲黄土-古土壤序列为揭示西风带与亚洲季风共同作用下的古粉尘沉积与气候演化提供了关键档案。

通过对107个黄土剖面的光释光年龄与气候代用指标进行集成分析，研究组重建了距今13万年来粉尘质量堆积速率与水文气候变化历史。结果表明：在海洋同位素阶段4至2期（7.1万-1.2万年前），研究区呈现高粉尘堆积速率与低湿度特征；而在MIS5期（13万-7.1万年前）与MIS1期（1.2万年前至今），则表现为低粉尘堆积速率与高湿度组合。

这种波动受冰期-间冰期旋回中冰量变化驱动的降温效应所引发的大气湿度改变控制。在MIS5、MIS4-2及MIS1各时期，西风主导的中亚北部伊朗地区与季风主导的东亚地区在粉尘堆积速率和湿度方面呈现显著时空差异。尤其值得注意的是，受日照量变化调控的水汽输送机制，导致西风带降水与季风降水呈现反相位变化特征。

附：英文原文

Title: Atmospheric systems drive spatiotemporal divergence of dust and moisture changes across Asia over the past 130,000 years

Author: Guoqiang Li, He Yang, Xiaojian Zhang, Jiaxin Li, Peirui Du, Dongmei Han, Run Zhou, Yougui Song, Kathryn E. Fitzsimmons, Aditi K. Dave, Shuangwen Yi, Shugang Kang, Thomas Stevens, Jan-Pieter Buylaert, Zhongping Lai, Yixuan Wang, Ji Lai, Zhongfeng Yan, Jin Yang, Xiaoyan Wang, Luo Qin, Siyi Gou, Chunzhu Chen, Chongyi E, Qiuyue Zhao, Leibin Wang, Tao Lu, Yanqing Deng, Lele Shu, Lupeng Yu, Xiangjun Liu, Zhiyong Ling, Qiufang Chang, Haitao Wei, Haichao Xie, Fahu Chen

Issue&Volume: 2026-03-13

Abstract: Loess-paleosol sequences across Asia provide a critical archive of past dust deposition and climate dynamics shaped by westerlies and Asian monsoons. We compile luminescence ages and climatic proxies from 107 loess sections to reconstruct dust mass accumulation rates (MARs) and hydroclimate variability over the past 130 thousand years (ka). The results reveal a consistent pattern: high MARs and low moisture during Marine Isotope Stages (MIS) 4 to 2 (71 to 12 ka) and low MARs with high moisture during MIS 5 (130 to 71 ka) and MIS 1 (12 ka to present). These shifts are driven by cooling-induced changes in atmospheric humidity linked to fluctuations in ice volume across glacial-interglacial cycles. Within MIS 5, MIS 4 to 2, and MIS 1, pronounced spatial and temporal contrasts in MARs and moisture emerge between westerlies-dominated northern Iran and central Asia and monsoon-dominated East Asia. Notably, westerly and monsoonal precipitation vary out of phase, driven by insolation-controlled shifts in moisture transport.

DOI: adx8500

Source: https://www.science.org/doi/10.1126/sciadv.adx8500