Orbital and Millennial-Scale Climate Variability over the Past 76 ka in the Western Tarim Basin, Northwest China

查看全文 作　　者：Rui [1,2,3]Zhang;Qiuzhen [3]Yin;Weihua [4]Nai;Zhixiang [2]Wang;Hao [3]Lu;Chunju [2,5]Huang;Yansheng [2,6]Gu;Lin [2]Li;Yusong [7]Wang;Linjing [8]Liu 机构地区：[1]College of Urban and Environmental Sciences,Hubei Normal University,Huangshi,435002,China;[2]State Key Laboratory of Biogeology and Environmental Geology,School of Earth Sciences,China University of Geosciences,Wuhan,430074,China;[3]Georges Lemaître Centre for Earth and Climate Research,Earth and Life Institute,UniversitéCatholique de Louvain,Louvain-La-Neuve,1348,Belgium;[4]No.2 Hydrological and Engineering Geology Party of Xinjiang Bureau of Geology and Mineral Resources Exploration and Development,Changji,831100,China;[5]Hubei Key Laboratory of Critical Zone Evolution,School of Earth Sciences,China University of Geosciences,Wuhan,430074,China;[6]Hubei Key Laboratory of Wetland Evolution&Eco-Restoration(WEER),China University of Geosciences,Wuhan,430074,China;[7]School of Environmental Studies,China University of Geosciences,Wuhan,430074,China;[8]Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences(CAGS),Shijiazhuang,050061,China 出　　处：《Journal of Earth Science》索引2023年第34卷第1期,共8页 基　　金：supported by the National Natural Science Foundation of China (Nos. 41772029, 41322013);Natural Science Foundation for Distinguished Young Scholars of Hubei Province of China (No. 2016CFA051);the Program of Introducing Talents of Discipline to Universities (Nos. B14031, B08030);the Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (Nos. CUGCJ1703, CUGQYZX1705);Hydrogeological Environmental Geological Survey of Kashi, Xinjiang (No. S15-2LQ1)。 摘　　要：Paleoclimate changes during the last glacial in the arid central Asia are not as well understood as the monsoon-dominated areas of Asia. Here we report a 75-m-long sediment core over past 120 kyr based on astronomical tuning combined with the optically stimulated luminescence(OSL) dating in the Kashi depression of the western Tarim Basin, Northwest China. Analysis of grain size and highresolution gamma ray(GR) logs from the KT11 borehole across the last glacial period yields a climate history for the Tarim Basin which reflects the variations of its temperature and the hydrological cycles. Comparison of these records with north hemisphere summer insolation, the Greenland ice core temperature, stalagmites and the loess from the nearby region indicates that the deposits in the fluvio-lacustrine system of the Kashi depression responded to climate change at the Younger Dryas(YD), six Heinrich cooling events and the Dansgaard-Oeschger cycles. Our work indicates that the alternations between warm-humid and cold-dry climates were prevalent in the western Tarim Basin during the last glacial period, showing an in-phase pattern with the climate variations of the East Asian Monsoon, controlled ultimately by precession and North Atlantic Ocean climate variability on orbital-millennial time scales. 关 键 词：abrupt climate changes glacial geology last glacial period KT11 borehole western Tarim Basin