Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 41472144 |
| 末次盛冰期以来中亚干旱区气候干湿变化历史：天山巴音布鲁克盆地风成沙年代地层学记录 | |
| 隆浩 | |
| 主持机构 | 中国科学院南京地理与湖泊研究所 |
| 开始日期 | 2015 |
| 结束日期 | 2018 |
| 资助经费 | 920000(CNY) |
| 项目类别 | 面上项目 |
| 资助机构 | CN-NSFC（国家自然科学基金） |
| 语种 | 中文 |
| 国家 | 中国 |
| 英文简介 | The mid-latitude Asian continent can be divided into two distinct climatic regions: the humid eastern part of Asia (mainly controlled by monsoon circulation, namely monsoonal Asia) and semiarid-arid central Asia (SCA) in the western part, dominated by the mid-latitude westerlies. Compared with the broad understanding of evolution and mechanisms of the palaeoclimate in monsoonal Asia, the past climate (especially moisture) patterns in SCA dominated by the westerlies are poorly documented and understood. For instance, there are controversial points of view on the temporal patterns of effective moisture variations since the Last Glacial Maximum (LGM), mostly derived from lake sedimentary records. Instead of pollen, inorganic sediment and isotope records preserved in lacustrine sediments, sand dune sediments from arid and semiarid areas can be considered as an archive of past moisture variation and the inclusive aeolian sand/palaeosol stratigraphy is clearly indicative of regional aridity/wetness conditions. In addition, with the advances in luminescence dating which can directly date periods of sand deposition, it has become possible to provide more precise correlations of periods of dune evolution to other palaeoclimatic proxies and records. Although sand dunes or stabilized dune fields covers large area in SCA, few sand dune records have been reported for constructing past moisture changes during the late Quaternary in this region. Here we propose a research on reconstructing sand dune evolution from the Bayanbulak Basin in the Tienshan Mountains (Xinjiang, NW China), aimed to infer the past moisture history in mid-latitude central Asia dominated by westerlies. In this project, a set of methods, i.e. Optically Stimulated Luminescence (OSL) chronology, Ground Penetrating Radar (GPR) survey and proxies (including grain size, magnetic susceptibility, total organic, colour) analysis, will be used to construct the chronostratigraphy of sand dune evolution in Bayanbulak Basin. Then the moisture status during the LGM and humidity variation pattern during the Holocene in the Bayanbulak Basin can be inferred. |
| 来源机构 | 中国科学院南京地理与湖泊研究所 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/345767 |
| 推荐引用方式 GB/T 7714 | 隆浩.末次盛冰期以来中亚干旱区气候干湿变化历史：天山巴音布鲁克盆地风成沙年代地层学记录.2015. |
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