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

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过去的季风变化。所有四个湖泊系统（纳姆错、Puma Yumco、Tangra Yumco和Mapam Yumco）沿着一个东西向的样带，具有不同的湿度供应，与季风的强度和渗透有关，将通过海底剖面、核心分析和陆上测绘进行调查。通过使用水声技术，水下海滩遗迹表明比现在更负的水平衡和指向地震活动的断层将被探测到。此外，还将利用盆地形态、沉积物分布和沉积物地层学来追踪沉积格局的变化，并确定具有代表性的岩心位置。来自岩心分析的地球化学、沉积学和地球物理数据是该小组多代理数据集的一部分，我们将利用这些数据集显示水文和沉积制度的差异，这些差异表明季风驱动的水分供应发生了变化。将建立岩心的详细年代学，使我们能够在百年尺度上检测沉积历史的差异。

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.