<b>A coupled climate-water-dust system in arid China and its response to global change since the Last Deglaciation</b>

ML section (100.84°E, 38.29°N) is located in Minle County, Zhangye, Gansu Province, northwest China, with the altitude of 2673 m and a depth of 8 m. The upper 1.0 m of the ML section is mainly composed of light yellow silty clay, and the middle part (1.0–2.5 m) is yellow-white siltstone. The lower part (2.5-8.0 m) is brownish-yellow silty clay containing loess-like silt and delicate sand layers. ML was sampled at 3 cm in interval, and a total of 254 eolian sedimentary samples were obtained for analysis of proxies. AMS 14C dating is carried out on 20 samples. According to the age-depth model, the section covers the past 18,000 years, and the accumulation rate of loess increases sharply with the increase in depth. The particle size, magnetic susceptibility (MS), mineralogy, and geochemical indicators of 235 samples from the ML section were determined.ML剖面（东经100.84°，北纬38.29°）位于中国西北甘肃省张掖市民乐县，海拔2673米，剖面厚度8米。ML剖面上部1.0米主要由浅黄色粉质黏土构成，中部（1.0–2.5米）为黄白色粉砂岩；下部（2.5–8.0米）为含类黄土粉砂与细砂层的棕黄色粉质黏土。该剖面以3厘米为采样间隔，共获取254份风成沉积样品用于代用指标分析。研究人员对其中20份样品开展了加速器质谱（AMS）¹⁴C测年。依据年龄-深度模型，该剖面覆盖了过去18000年的沉积记录，且黄土堆积速率随深度增加而显著升高。此外，研究人员对ML剖面的235份样品完成了粒度、磁化率（MS）、矿物学及地球化学指标的测试分析。