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《Geochimica》 2007-06
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Climatic-environmental evolution in Gahai Lake area of Qaidam Basin since Late Last Deglacial Period

CHEN Zhong1,2 ,MA Hai-zhou2,CAO Guang-chao2,3,4,ZHANG Xi-ying2,ZHOU Du-jun2,YAO Yuan3,5,TAN Hong-bing2 and GAO Zhang-hong21.Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China;2.Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining 810008,China;3.Graduate University of Chinese Academy of Sciences,Beijing 100049,China;4.School of Life and Geography Science,Qinghai Normal University,Xining 810008,China;5.Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China  
Gahai Lake in Qaidam Basin is a closed lake,and is therefore a good site to study paleoclimate.Based on the analyses of carbonate content,oxygen and carbon stable isotope compositions of authicarbonate in Core DG03,which is about 35 m in depth and drilled from Gahai Lake,a climatic-environmental evolution since the late Last Deglacial Period is constructed.The results show that the change in climate and environment was large during the late Last Deglacial Period.During the early Holocene(11360-8370 a B.P.),it was arid and became warm,but with a distinct fluctuation of climate.The mid-Holocene was wet,with stable climatic environment in the early period(8370-5390 a B.P.),and then cool but humid in the late period(5390-3200 a B.P.).The late Holocene was dry on the whole,rather humid with dry trend in the early period(3200-1950 a B.P.) and then very arid in the late period.There was a wet event at about 1500 a B.P.during the late Holocene.
【Fund】: 中国科学院知识创新工程重要方向项目(KZCX2-SW-118)
【CateGory Index】: P532
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