We present results for three sections with a representative loess record of the end of the Late Pleistocene from the south-east of Western Siberia. These sections are characterized by different structure and formed in different geomorphological position of Ob Loess Plateau and Cis-Salair plain. The age of deposits within MIS 1 - MIS 3 is determined by radiocarbon and OSL dating. Data on the quartz grain morphology confirmed that aeolian processes were the main factor in the accumulation of studied profiles, the influence of cryogenic weathering was also noted. Evidence of the MIS 2 warmings have been recorded in the northwestern Salair region (Ust’-Chem section), presented by two weakly developed Late Glacial paleosols formed 14.9–12.3 kyr ago. The distribution of magnetic susceptibility and grain size records in the Lozhok and Klyuchi sections reveals a period of relatively long term aridization with an increase in atmosphere dustiness in the lower part of the Eltsovka loess (MIS 2). The trend of increase in humidity with decrease in the atmosphere dynamics is observed during the second part of MIS 2. An event of activation of local aeolian processes with dune formation took place 47 kyr ago (the first half of the Karga interstadial; MIS 3) in the Klyuchi section. It is supposed that the geomorphological situation and the presence of nearby material available for local redeposition was a significant agent in the formation of the lower layer of Klyuchi and Ust-Chem sections. It was formed by combined deposition of silt material from the atmosphere flow and by the local aeolian transportation of sand. Permafrost-solifluction event was established in the northeastern part of the Ob Loess Plateau at about 23 ka.

我们展示了三个剖面的结果，其中包含来自西西伯利亚东南部的晚更新世末期具有代表性的黄土记录。这些剖面具有不同的构造特征，形成于鄂毕黄土高原和Cis-Salair平原的不同地貌位置。MIS 1 - MIS 3 内的沉积物年龄由放射性碳和 OSL 测年确定。石英颗粒形态的数据证实，风成作用是研究剖面积累的主要因素，还注意到低温风化的影响。MIS 2 变暖的证据已记录在西北部 Salair 地区（Ust'-Chem 部分），由两个发育较弱的晚冰期古土壤提供，形成于 14.9-12.3 kyr。Lozhok 和 Klyuchi 剖面的磁化率分布和粒度记录显示，Eltsovka 黄土下部 (MIS 2) 处于相对长期的干旱化时期，大气尘土含量增加。在 MIS 2 的第二部分观察到湿度随着大气动力学的减少而增加的趋势。 47 kyr 前（Karga 间质的前半部分；MIS 3）发生了具有沙丘形成的局部风成过程激活事件在 Klyuchi 部分。据推测，地貌状况和附近可用于局部再沉积的物质的存在是形成 Klyuchi 和 Ust-Chem 剖面下层的重要因素。它是由大气流中的淤泥物质和当地沙子的风积输送相结合而形成的。23 ka 左右，黄土高原东北部发生多年冻土溶蚀事件。