Abstract Based on the precise measurement of AMS14C ages in Late Pleistocene stratigraphic section at Muli area in the south slope of Qilian Mountains,and combined with the study of sedimentary grain size,magnetic susceptibility, and oxide(SiO2,Al2O3 and Fe2O3)content,we reconstructed the climatic change of the study area during 44.8-35ka B.P. with 3 stages:(1)During 44.8-40.5ka B.P.,all the proxies show that the regional environment is warm and humid. The warm event around 41.9ka B.P. corresponds to IS12 in Dansgaard-Oeschger events;(2)During 40.5-35.5ka B.P.,the climate fluctuated frequently and tended to be cold. The three warm events of IS9-IS11, i.e., 35.8ka B.P.,37.5ka B.P.,and 39.7ka B.P.,respectively,and the H3 cold event of 35.5ka B.P.,were found during this period;(3)During 35.5-35ka B.P.,the climate fluctuated strongly and tended to get warm. These features of climatic fluctuation fit well with those of the late stage of MIS3. It indicates that the climate changes could spread globally but the precipitation situation varies in different areas.
About author: Wang Qing,born in 1989,is a candidate for master degree in China University of Geosciences(Beijing). She is mainly engaged in researches of Quaternary environment and urban geology.E-mail: imnuwq@163.com. About the corresponding author Cheng Jie,born in 1963,is a professor of China University of Geosciences(Beijing). He is mainly engaged in researches of Quaternary environment and urban geology. E-mail: chgj@cugb.edu.cn.
图1 祁连山南坡木里地区与木里剖面位置示意图 Fig.1 Sketch map showing position of Muli area and Muli section in south slope of Qilian Mountains
Cite this article:
Wang Qing,Sun Hongyan,Ren Jianwu et al. Climatic change during the late stage of Late Pleistocene at Muli area in south slope of Qilian Mountains[J]. JOPC, 2015, 17(3): 417-426.
Wang Qing,Sun Hongyan,Ren Jianwu et al. Climatic change during the late stage of Late Pleistocene at Muli area in south slope of Qilian Mountains[J]. JOPC, 2015, 17(3): 417-426.
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