粉尘循环是全球气候变化研究的重要内容，而千-百年尺度粉尘释放的变化规律目前仍不清楚。本申请拟沿东亚季风影响梯度选择蒙古肯特山Nur泥炭、大兴安岭驼峰岭天池和长白山哈尼泥炭为研究对象，利用矿物碎屑粒度组成、总有机碳、地壳元素等评价局地碎屑颗粒输入和成岩作用对大气降尘组分的影响，提取粉尘变化代用指标，并结合AMS14C年代重建全新世大气粉尘变化历史。利用稀土元素、稳定同位素（Pb、Sr和Nd）等辨识潜在来源，进而利用化学质量平衡模型解析不同源区不同时期对粉尘输入的贡献份额。通过东亚季风影响梯度下大气降尘序列间的比较以及与其它古气候记录比较，结合特征时段的古气候模拟，探究全新世东北亚地区气候环境的变化规律，重建东北亚季风边缘的进退历史，揭示全新世大气粉尘对区域气候变化的响应机制。本研究契合“一带一路”倡议下中蒙两国加强科技合作的迫切需求，将为中蒙两国保护湿地生态和应对气候变化提供重要的科技支撑。

Dust cycle is an important issue of current studies about global climate system change, and it is still not clear about the dust emission evolution on millennial and centennial – scale. In this study, Nur peatland on Kenthii Mt of Mongolia, Tuofengling volcanic lake on Great Hinggan Mt and Hani peatland on Changbai Mt are selected as typical study areas, where they are distributed along the pathway of East Asia Winter Monsoon. Several long intact cores have been collected and dated by AMS14C and 210Pb dating techniques for a precise chronology. The effects of local debris particle input and diagenesis on atmospheric dust components will be evaluated by using mineral debris particle size composition, total organic carbon and lithogenic elements. Then alternative indicators of dust change will be extracted, and the Holocene atmospheric dust change history will be reconstructed in combination with AMS14C. The potential sources will be identified by rare earth elements (REE) and radiogenic stable isotopes (Pb, Sr and Nd), and the contribution of different sources to dust input at different periods will be analyzed by chemical mass balance model. By comparing the atmospheric dust sequence under the influence gradient of East Asian monsoon and other paleoclimatic records as well as the dynamical palaeoclimate simulations in characteristic periods, the Holocene climate variation in Northeast Asia will be explored in detail. The changing history of the margin of Northeast Asian monsoon will be reconstructed, and the response mechanism of Holocene atmospheric dust to regional climate change will be revealed. This study is in line with the urgent demand for strengthening scientific and technological cooperation between China and Mongolia under the Belt and Road initiative. It will provide important technological support for China and Mongolia to protect wetland ecology and address climate change.