Holocene Climate Evolution of the Ugii Nuur Basin, Mongolia  

作　　者：Wolfgang SCHWANGHART Brigitta SCHTT Michael WALTHER 

机构地区：[1]Department of Environmental Sciences, University of Basel [2]Institute of Geographical Sciences, Freie Universitt Berlin [3]Mongolian Landscape Research Centre, National University of Mongolia

出　　处：《Advances in Atmospheric Sciences》2008年第6期986-998,共13页大气科学进展（英文版）

摘　　要：In order to evaluate the Holocene palaeoenvironmental evolution of the Ugii Nuur basin, central Mongolia, investigations on chemical and mineralogical properties of lacustrine sediments were carried out on a 630 cm sediment core from lake Ugii Nuur. The interpretation of the record is based on a principal component analysis （PCA） of the elemental composition of the samples. The results show that lacustrine deposition started at 10.6 kyr BP. Low lake level conditions were identified during the Early Holocene （10.6-7.9 kyr BP）. The Mid Holocene （7.9-4.2 kyr BP） was characterized by generally higher lake levels and thus higher moisture supply, but it experienced strong climatic fluctuations. Arid conditions prevailed from 4.2-2.8 kyr BP and were followed by a stable, more humid phase until today.In order to evaluate the Holocene palaeoenvironmental evolution of the Ugii Nuur basin, central Mongolia, investigations on chemical and mineralogical properties of lacustrine sediments were carried out on a 630 cm sediment core from lake Ugii Nuur. The interpretation of the record is based on a principal component analysis （PCA） of the elemental composition of the samples. The results show that lacustrine deposition started at 10.6 kyr BP. Low lake level conditions were identified during the Early Holocene （10.6-7.9 kyr BP）. The Mid Holocene （7.9-4.2 kyr BP） was characterized by generally higher lake levels and thus higher moisture supply, but it experienced strong climatic fluctuations. Arid conditions prevailed from 4.2-2.8 kyr BP and were followed by a stable, more humid phase until today.

关 键 词：lake sediments PALAEOCLIMATE Central Asia Mongolia HOLOCENE 

分 类 号：P532[天文地球—古生物学与地层学]