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题名: A 16-ka lake-level record inferred from macrofossils in a sediment core from Genggahai Lake, northeastern Qinghai-Tibetan Plateau (China)
作者: Qiang, MR(强明瑞); Song, L; Chen, FH(陈发虎); Li, MZ; Liu, XX; Wang, Q
收录类别: SCIE ; BIOSIS
出版日期: 2013-04
刊名: JOURNAL OF PALEOLIMNOLOGY
卷号: 49, 期号:4, 页码:575-590
出版者: SPRINGER
出版地: DORDRECHT
英文摘要: Genggahai Lake, a small, shallow water body on the northeastern Qinghai-Tibetan Plateau, is presently occupied by dense aquatic vegetation. The distribution of macrophytes is strongly associated with water depth. Macrofossils from a 7.82-m sediment core indicate that the dominant taxa in past aquatic plant communities were almost the same as those that dominate the lake today. In combination with sediment geochemical variables TOC, TN, and delta C-13(bulk-org), macrofossil assemblages (aquatic plant remains, stem encrustations, and mollusc shells) were employed to reconstruct lake-level fluctuations over the past 16 ka. The lake formed or refilled at 15.3 cal ka and sustained a low level until 11.4 cal ka. From 11.4 to 6.3 cal ka, a remarkably high level was punctuated by a period of relatively low level between 9.2 and 7.4 cal ka. Stepwise drops in lake level occurred from 6.3 to 5.5 cal ka. Water level was characterized by more frequent fluctuations between 5.5 and 4.1 cal ka. Low level persisted from 4.1 to 2.1 cal ka and from 1.6 to 0.3 cal ka. Short-lived episodes of high water level were centered around 1.8 cal ka and since 0.3 cal ka. The lake-level history of Genggahai Lake appears to be largely consistent with the Asian monsoon records from nearby and distant locations. Our preliminary results suggest that monsoon variability on centennial to millennial timescales was superimposed on the long-term pattern of the Asian monsoon, modulated by orbitally induced summer insolation, and that the Asian monsoon may play an important role in water balance in marginal regions.
关键词: Macrofossils ; Lake level ; Asian monsoon ; Abrupt changes ; Holocene ; Qinghai-Tibetan Plateau
作者部门: [Qiang, Mingrui ; Song, Lei ; Chen, Fahu ; Li, Mingzhi ; Liu, Xingxing ; Wang, Qin] Lanzhou Univ, Res Sch Arid Environm & Climate Change, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China ; [Song, Lei] Chinese Acad Geol Sci, Inst Hydrogeol & Environm Geol, Shijiazhuang 050061, Peoples R China
通讯作者: Qiang, MR (reprint author), Lanzhou Univ, Res Sch Arid Environm & Climate Change, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China.
学科分类: Environmental Sciences & Ecology; Geology; Marine & Freshwater Biology
文章类型: Article
所属项目编号: National Basic Research Program of China [2012CB956102, 2010CB403301] ; National Science Foundation of China [41271219, 41021091] ; MOE Program for New Century Excellent Talents in University
所属项目名称: 国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划) ; 新世纪优秀人才支持计划
项目资助者: NSFC ; MOST ; MOE
语种: 英语
DOI: 10.1007/s10933-012-9660-z
ISSN号: 0921-2728
WOS记录号: WOS:000316888900003
BIOSIS记录号: BIOSIS:PREV201300345742
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/120264
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Qiang, MR,Song, L,Chen, FH,et al. A 16-ka lake-level record inferred from macrofossils in a sediment core from Genggahai Lake, northeastern Qinghai-Tibetan Plateau (China)[J]. JOURNAL OF PALEOLIMNOLOGY,2013,49(4):575-590.
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