The holocene sedimental characteristicand paleoclimatic evolution of Ebinur Lake, XinJiang

Abstract

On the basis of lacustrine sedimentary profile of Ebinur Lake, sequences of evolution of paleoclimate and paleoenvironment in Ebinur Lake area have been rebuilt by analysing the sedimentary stratigraphy, bio-stratigraphy and geochemistry as well as the chronological records. The results show that, during the last 10 ka years, the general change trends of the paleoclimate in E-binur Lake area can be divided into three stages: (1) 10. 2 – 8.3 ka B. P., a warm-cool dry climate stage; (2) 8.3–3.5 ka B. P., a warmer moist climate stage (specially, 7.3–6.4 ka B. P., a relatively stable humid temperate stage); (3) 3.5 ka B. P. —present, adraught temperate climate stage, similar to the present climate. In addition, there existed clearly several times of secondary undulations of dry-humid climate, i.e. 8.3 ka and 7.3 ka for dry climate