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.
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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