Holocene climatic and environmental changes recorded in Baahar Nuur Lake core in the Ordos Plateau, Inner Mongolia of China

作     者：GUO LanLan FENG ZaoDong LI XinQing LIU LianYou WANG LiXia 

作者机构：MOE Key Laboratory of Environment Change and Natural Disaster Beijing Normal University Beijing 100875 China MOE Key Laboratory of Western China's Environmental Systems Lanzhou University Lanzhou 730000 China Department of Geology Baylor University Waco Texas 76798 USA Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Provincial Environmental Quality Monitoring Administration Shenyang 110031 China 

出 版 物：《Chinese Science Bulletin》 (Chin. Sci. Bull.)

年 卷 期：2007年第52卷第7期

页      面：959-966页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 08[工学] 081501[工学-水文学及水资源] 0815[工学-水利工程] 

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 40025105, 40331102, 40421101 and 40671184) US National Science Foundation (Grant No. NSF-ESH04-02509) Ministry of Science and Technology of China (Grant No. G2000048701) National Geographic Ministry of Society (Grant No. NGS-6938-00) 

主　　题：内蒙古 鄂尔多斯高原 巴汗淖尔 湖泊沉积 岩芯记录 全新世 气候变化 环境变化 

摘      要：A 5.3 m lake core was drilled in Baahar Nuur Lake in the Ordos Plateau, and measurements of meangrain size, organic δ 13C (δ 13Corg), organic carbon content (TOC), C/N, carbonate content, carbonate δ 13C(δ 13Ccar) and δ 18O (δ 18Ocar) were conducted for retrieving the Holocene chronosequence of climaticchanges based on 15 AMS 14C dates. The record documented four major stages of climate change inthe Ordos Plateau: (IV) a cold and dry condition before ～7.65 14C ka BP; (III) a warm and humid stagebetween ～7.65 and ～5.40 ka BP; (II) a generally drier and cooler climate since ～5.40 ka BP with twohumid events occurring from ～4.70 to ～4.60 ka BP and from ～4.20 to ～3.70 ka BP, and (I) a dry climatecharacterized by complete desiccation of the lake after 3.70 ka BP. Stage III can be further divided intothree sub-stages: (IIIa) a warm and humid episode from ～7.65 to ～6.70 ka BP, (IIIb) a warm and relativelydry episode from ～6.70 to ～6.20 ka BP, and (IIIc) the magthermal and maghumid episode of the Holo-cene from ～6.20 to ～5.40 ka BP.