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题名: Holocene cold events on the Tibetan Plateau
作者: Mischke, S; Zhang, CJ(张成君)
收录类别: SCIE
出版日期: 2010-06
刊名: GLOBAL AND PLANETARY CHANGE
卷号: 72, 期号:3, 页码:155-163
出版者: ELSEVIER
出版地: AMSTERDAM
英文摘要: A lake sediment core from the eastern Tibetan Plateau was investigated by multi-proxy geochemical, sedimentological and magnetic analyses and its age determined using (14)C AMS dating in an approach to use short-lived climate periods for a spatial assessment of the Holocene climate history on the Tibetan Plateau. Six cold events were identified from the Lake Ximencuo record which occurred between 10.3-10.0, 7.9-7.4, 5.9-5.5, 4.2-2.8, 1.7-1.3 and 0.6-0.1 cal ka BP. A comparison with previously published Holocene records from lake and peat sections, ice cores and glacial remains of the Tibetan Plateau revealed that the cold event starting around 4.2 cal ka BP had the most significant and widespread impact on almost all of the examined sites. This cold event lasted about a millennium in the western and central part of the Tibetan Plateau and possibly several hundred years longer at some sites in its eastern realm. The cold event inferred between 7.9 and 7.4 cal ka BP from Lake Ximencuo was recorded at a number of sites on the eastern Tibetan Plateau too and probably corresponds to a cold event identified around 8.2 cal ka BP at the sites on the western and central Tibetan Plateau. The coincidence with the 8.2 ka event of the North Atlantic region implies that the latter exerted a significant environmental impact on the Tibetan Plateau too. The cold spell between 10.3 and 10.0 cal ka BP was recorded at some marginal sites of the Tibetan Plateau but had apparently a less significant environmental impact. The more irregular pattern of cold events between about 7 cal ka BP and the onset of the cold event after 4.2 cal ka BP might be related to the catchment-specific response of the lake sediment and peat accumulation to the termination of the Holocene 'climatic optimum' on the Tibetan Plateau. The final two cold events between 1.7 and 1.3 cal ka BP and in the last several hundred years representing the Little Ice Age are more widely seen on the Tibetan Plateau although they did not reach the significance of the cold event at 4.2 cal ka BP. However, the three cold periods since 4.2 cal ka BP are apparently coeval with the decline and establishment of Chinese Dynasties implying a remarkable impact on the social systems in eastern China. The consistent inference of cold events around 8.2 cal ka BP or a few hundred years later and starting at 4.2 cal ka BP is evidence for a temporary trans-regional climatic response on the Tibetan Plateau in the Holocene regardless of the catchment-specific response of complex natural systems. (C) 2010 Elsevier B.V. All rights reserved.
关键词: Holocene ; 8.2 ka event ; 4.2 ka event ; Tibetan Plateau ; Palaeolimnology ; Geochemistry ; Grain size ; Event stratigraphy
作者部门: [Mischke, Steffen] Free Univ Berlin, Inst Geol Sci, D-12249 Berlin, Germany ; [Zhang, Chengjun] Lanzhou Univ, Sch Resources & Environm Sci, Lanzhou 730000, Gansu, Peoples R China
通讯作者: Mischke, S (reprint author), Free Univ Berlin, Inst Geol Sci, Malteserstr 74-100, D-12249 Berlin, Germany.
学科分类: Physical Geography; Geology
文章类型: Article
所属项目编号: German Research Foundation (DFG)
所属项目名称: 德国科学基金会项目
项目资助者: DFG
语种: 英语
DOI: 10.1016/j.gloplacha.2010.02.001
ISSN号: 0921-8181
WOS记录号: WOS:000280040300007
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/119995
Appears in Collections:资源环境学院_期刊论文

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Mischke, S,Zhang, CJ. Holocene cold events on the Tibetan Plateau[J]. GLOBAL AND PLANETARY CHANGE,2010,72(3):155-163.
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