Reconstruction of the Hydrological Cycle in the Southern Transect of the Tibetan Plateau Utilizing Sediment Records

利用沉积物记录重建青藏高原南段水文循环

• 批准号: 69117873
• 负责人: Professor Dr. Roland Mäusbacher
• 金额: --
• 依托单位: Lehrstuhl Physische Geographie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/69117873?language=en
• 关键词: Reconstruction; Hydrological; Cycle; Southern; Transect

The overall aim of this project is to reconstruct changes in the hydrological cycle indicating past monsoon variability in the southern and central part of Tibet All together four lake systems (Nam Co, Puma Yumco, Tangra Yumco and Mapam Yumco) along an E-W transect with different moisture supply related to strength and penetration of the monsoon will be investigated with subbottom profiling, core analyses and onshore mapping. By using hydroacoustic techniques submerged beach remains indicating a more negative water balance than today and faults pointing to seismic activity will be detected. In addition basin morphology, sediment distribution and sediment stratigraphy will be used to trace changes in the sedimentary pattern and to identify representative core locations. Geochemical, sedimentological and geophysical data derived from core analyses are part of the groups multiproxy dataset, with which we will show differences in the hydrological and sedimentary regime that are indicating changes in monsoon driven moisture supply. A detailed chronology for the cores will be established, enabling us to detect differences in the sedimentary history on a centennial scale.

该项目的总体目标是重建水文循环的变化，表明西藏南部和中部地区过去的季风变化。将通过海底剖面、岩心分析和陆上测绘，对沿东西向横断面的四个湖泊系统（纳木错、普玛雍错、当格拉雍错和玛旁雍措）进行研究，这些系统具有与季风强度和渗透力相关的不同水分供应。通过使用水声技术，水下海滩遗迹显示出比现在更加负的水平衡，并且将检测到指向地震活动的断层。此外，盆地形态、沉积物分布和沉积物地层学将用于追踪沉积模式的变化并确定代表性的岩心位置。来自岩心分析的地球化学、沉积学和地球物理数据是该组多代理数据集的一部分，我们将通过这些数据显示水文和沉积状况的差异，这些差异表明季风驱动的水分供应的变化。将建立岩心的详细年代学，使我们能够检测百年尺度上沉积历史的差异。

项目成果

Hydrological variations on the Central Tibetan Plateau since the Last Glacial Maximum and their teleconnection to inter‐regional and hemispheric climate variations

• DOI: 10.1002/jqs.2759
• 发表时间: 2015-01
• 期刊: Journal of Quaternary Science
• 影响因子: 2.3
• 作者: T. Kasper;T. Haberzettl;Junbo Wang;G. Daut;S. Doberschütz;Liping Zhu;R. Mäusbacher