选择新疆巴里坤湖和博斯腾湖的长钻岩芯，在AMS 14C测年、OSL（单颗粒）钾长石测年和天然剩磁相对强度对比定年的基础上，利用湖泊沉积分辨率较高的优势建立连续的末次间冰期旋回代用指标序列。结合现代过程研究，以孢粉等重建植被和湿度变化，以长链烯酮来重建温度变化，定量化地重建15万年来有可靠年代控制的研究区气候环境演化历史。分析MIS5、MIS3、LGM等特征时段在研究区的表现，特别是水热配置特征。并通过2个湖泊记录的对比分析，辨识研究区过去15万年来轨道、千百年尺度气候环境变化的特征，然后开展全球框架下不同气候子系统之间的对比研究（高-低纬作用），结合气候模拟资料，理解亚洲中部干旱区末次间冰期-冰期气候环境变化的过程和动力机制。探讨不同的驱动因子、北大西洋气候和高低纬气候相互作用等对研究区气候的可能影响，揭示轨道尺度和千百年尺度西风气候变化的主控因子及其内在机制。

This study is to conduct intergrated studies on lacustrine sediments of the Lake Balikun and Bosten, covering the last 150 ka in Xinjiang, Northwestern China. the the basis of reliable and robust chronology dated by AMS 14C, K-fieldspar OSL, and relatively ancient geomagnetic field intensity, high-resolution 150 ka westerly climate records will be reconstructed using multi-proxies (including biological markers (UK37), pollen, grain size, in addtion to sedimentological parameters), to address the fundmental features and climatic and envrionmental events in regarding to climate history and moisture variability of Xinjiang since the last interglacial. Through the detailed compasrion with the climatic records from the monsoonal regions, and with global climatic data as well, we intend to discuss the potential influences of solar insolation, ice volume, north Atlantic climate and high- and low-latitude climatic interaction on inland climate in the westerly dominated area at orbital and millennial-century timescales, and to reveal the dominant controlling factors of orbital and millennial-century timescales westerlies climatic changes.