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题名: Holocene lake deposits of Bosten Lake, southern Xinjiang, China
作者: Wunnemann, B; Chen, FH(陈发虎); Riedel, F; Zhang, CJ; Mischke, S; Chen, GJ; Demske, D; Ming, J
收录类别: SCIE ; CPCI-S
出版日期: 2003-07
会议名称: Symposium on Abrupt Environmental Changes in Arid Asia History and Mechanisms (RACHAD 2001)
会议日期: OCT, 2001
会议地点: LANZHOU, PEOPLES R CHINA
英文摘要: A 9.25-m-long sediment core from Bosten Lake, Xinjiang, provides detailed information about changes in the water budget and biological acticity over the last 8400 calendar years. The chronology is constructed from six AMS radiocarbon dates on the terrestrial plant remains. Based on analyses of TOC, CO3, detrital compounds and biogenic SiO2, lake level fluctuations and periods of remarkably-negative water budget appeared at 8.4-8.2 cal ka, 7.38-7.25 cal ka, 5.7-5.5 cal ka, 3.7-3.4 call ka and 3.3-2.9 cal ka, respectively. As they are in-phase with low lake levels at Sumxi Co and Bangong Co in western Tibet Plateau and with paleolakes in Inner Mongolia, a climate-induced change to somewhat drier and warmer conditions is inferred. A further drop in lake level after 1320 AD of about 200 yr duration may be attributed to a negative water balance prior to the main phase of the Little Ice Age. Deep and stable lake phases of 1500 yr and 1800 yr duration at 7.2-5.7 cal ka and 5.5-3.7 cal ka coincide with maximum moisture during the Holocene Megathermal in China. The long term trend towards aridity since about 4.3 cal ka can clearly be recognised. The reduced water budget of Bosten Lake from 640-1200 AD may be attributed to local effects.
关键词: Bosten Lake ; Holocene ; sediments ; water balance ; lake level ; climate change
作者部门: Free Univ Berlin, Interdisciplinary Ctr Ecosyst Dynam Cent Asia, D-12249 Berlin, Germany ; Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Desert & Desertificat Lab, Lanzhou 730000, Peoples R China ; Lanzhou Univ, Ctr Arid Environm & Paleoclimate Res, Natl Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China
通讯作者: Wunnemann, B (reprint author), Free Univ Berlin, Interdisciplinary Ctr Ecosyst Dynam Cent Asia, D-12249 Berlin, Germany.
学科分类: Science & Technology - Other Topics
会议主办者: LANZHOU UNIV
会议录: CHINESE SCIENCE BULLETIN
卷号: 48
期号: 14
页码: 1429-1432
出版者: SCIENCE CHINA PRESS
出版地: BEIJING
语种: 英语
DOI: 10.1360/02wd0270
ISSN号: 1001-6538
WOS记录号: WOS:000184463300006
IR记录号: WOS:000184463300006
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内容类型: 会议论文
URI标识: http://ir.lzu.edu.cn/handle/262010/184646
Appears in Collections:资源环境学院_会议论文

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Recommended Citation:
Wunnemann, B,Chen, FH,Riedel, F,et al. Holocene lake deposits of Bosten Lake, southern Xinjiang, China[C]. 见:Symposium on Abrupt Environmental Changes in Arid Asia History and Mechanisms (RACHAD 2001). LANZHOU, PEOPLES R CHINA. OCT, 2001.
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