Reconstruction of the Hydrological Cycle in the Nam Co Area Utilizing Sediment Records and Cllimate Models

利用沉积记录和气候模型重建纳木错地区水文循环

• 批准号: 14435608
• 负责人: Professor Dr. Gerd Gleixner
• 金额: --
• 依托单位: Lehrstuhl Physische Geographie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/14435608?language=en
• 关键词: Reconstruction; Hydrological; Cycle; Nam; Co

The hydrological cycle in the Nam Co area, Central Tibet is spatio-temporally assessed in order to quantitatively reconstruct the past Asian Monsoon variability and its influence on lake sediment dynamics. The already conducted sub bottom profiling and pilot coring provide a first insight into the sedimentary history of the lake. Furthermore, seismic and sediment stratigraphy (sedimentary petrology, inorganic/organic chemistry) allows identifying changes in the sedimentary regime. Additionally experimental and modelling work is carried out to reconstruct the isotopic content of the lake. Therefore, in a bottom-up multi proxy approach including isotope ratios of specific terrestrial and aquatic biomarkers the isotopic content of the lake water and precipitation is reconstructed directly and independently from environmental conditions. A complementing top-down approach focussing on regional palaeoclimate simulations to reconstruct the isotopic content of the lake water is initialised. Tight integration of all these methods allows a quantitative understanding and reconstruction of precipitation and evaporation flux changes as well as their interaction with the sedimentary system of the Nam Co catchment. A synthesis with supporting proxy data from the partners of this joint research initiative as well as C dating will serve to interpret the results with regard to local and global aspects of Late Quaternary climate change.

为了定量重建过去亚洲季风变化及其对湖泊沉积动力学的影响，对西藏中部纳木错地区的水文循环进行了时空评价。已经进行的海底剖面和试验性取心提供了对该湖沉积历史的第一次洞察。此外，地震和沉积物地层学(沉积岩石学、无机/有机化学)能够识别沉积制度的变化。此外，还开展了实验和模拟工作，以重建该湖的同位素含量。因此，在包括特定陆地和水生生物标志物的同位素比值的自下而上的多代理方法中，湖水和降水的同位素含量是直接和独立于环境条件重建的。启动了一个补充的自上而下的方法，重点是区域古气候模拟，以重建湖水的同位素含量。所有这些方法的紧密结合，可以定量地了解和重建降水和蒸发通量的变化及其与纳木错流域沉积系统的相互作用。这项联合研究倡议的合作伙伴提供的支持性代理数据以及碳测年的综合将有助于解释关于第四纪晚期气候变化的局部和全球方面的结果。

项目成果

Oxygen isotope ratios of sedimentary biogenic silica reflect the European transcontinental climate gradient

沉积生物二氧化硅的氧同位素比反映了欧洲跨大陆气候梯度

• DOI: 10.1002/jqs.1172
• 发表时间: 2008
• 期刊: Journal of Quaternary Science
• 影响因子: 2.3
• 作者: Sloane;Sachse;Gleixner
• 通讯作者: Gleixner

Das Dach der Welt als Klimasensor

世界屋脊作为气候传感器

• DOI: 10.1002/fors.200790019
• 发表时间: 2007
• 期刊: Forschung
• 作者: Schwalb;Wrozyna;Mäusbacher;Wallner;Kroemer;Gleixner;Mugler;Sachse;Mosbrugger;Schutt;Berking
• 通讯作者: Berking

δD values of individual n-alkanes from terrestrial plants along a climatic gradient – Implications for the sedimentary biomarker record

陆地植物中各个正构烷烃沿气候梯度的 ΔD 值 â 对沉积生物标志物记录的影响

• DOI: 10.1016/j.orggeochem.2005.12.003
• 发表时间: 2006
• 期刊: Organic Geochemistry
• 影响因子: 3
• 作者: Sachse;Gleixner
• 通讯作者: Gleixner

Late-Holocene storm frequency record from coral reefs in the southern South China Sea

南海南部珊瑚礁全新世晚期风暴频率记录

• DOI: 10.1016/j.quaint.2007.04.001
• 期刊: Quaternary International
• 影响因子: 2.2
• 作者: Mügler;Gleixner;Mäusbacher;Schutt;Schwalb;Mosbrugger
• 通讯作者: Mosbrugger