Hydrodynamic process of Tibetan Plateau lake revealed by grain size:Case study of Pumayum Co

作     者：JU JianTing ZHU LiPing FENG JinLiang WANG JunBo WANG Yong XIE ManPing PENG Ping ZHEN XiaoLin LÜXinMiao 

作者机构：Key Laboratory of Tibetan Environment Changes and Land Surface ProcessesInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China College of Tourism and Geography SciencesYunan Normal UniversityKunming 650500China 

出 版 物：《Chinese Science Bulletin》 (Chinese Science Bulletin)

年 卷 期：2012年第57卷第19期

页      面：2433-2441页

核心收录：

学科分类：08[工学] 081501[工学-水文学及水资源] 0815[工学-水利工程] 

基　　金：supported by the National Natural Science Foundation of China(41130529,41101181 and 41102117) the Knowledge Innovation Key Program of the Chinese Academy of Sciences (KZCX2-EW-113 and KZCX2-YW-146) 

主　　题：高原湖泊 青藏高原 晶粒尺寸 水动力过程 案例 显示 沉积物粒度 动力学过程 

摘      要：Under the background of global warming,some lakes on the Tibetan Plateau(TP) are potentially sensitive to temperature *** a case study of Pumayum Co,where glacier meltwater is important to supply(we call this a glacier-fed lake hereafter),we analyze the sensitivity of lake sediment grain size to temperature *** is done by resolving the modern hydrodynamic process,coupled with comparison of paleoclimatic *** to the spatial distributions of parameters,percentage of grain size and the grain size frequency distribution curve,hydrodynamic processes are *** clastic sedimentation types are thereby *** the open lake area,suspended load transport is the main transport *** Size Trend Analysis(GSTA),a sediment dynamics model,reveals a trend toward eastward *** indicates that the largest and glacier-fed river,the Jiaqu River,influences the entire lake(not just the subsurface alluvial fan),and that lake sediment grain size may serve as a temperature *** series comparison between grain size of a short core from the central lake and meteorological data confirms this temperature indication,which in turn shows reliability of the method discriminating the hydrodynamic *** case study will improve the ability of paleoclimatic reconstruction using lake sediment in glacier-fed lakes on the Tibetan Plateau.