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Mid-Holocene climate variations recorded by palaeolake in marginal area of east Asian monsoon: A multi-proxy study
Long Hao1; Tan Hongbin1; Wang Naiang2; Tan Liangcheng3; Li Yu2
2007-12-01
发表期刊CHINESE GEOGRAPHICAL SCIENCE
卷号17期号:4页码:325-332
文章类型Article
摘要Traditionally, the mid-Holocene in most parts of China was thought to be warmer with higher precipitation, resulting from a strong Asian summer monsoon. However, some recent researches have proposed a mid-Holocene drought interval of millennial-scale in East Asian monsoon margin areas. Thus whether mid-Holocene was dry or humid remains an open issue. Here, Zhuyeze palaeolake, the terminal lake of the Shiyang River Drainage lying in Asian monsoon marginal areas, was selected for reconstructing the details of climate variations during the Holocene, especially mid-Holocene, on the basis of a sedimentological analysis. Qingtu Lake (QTL) section of 6.92m depth was taken from Zhuyeze palacolake. Multi-proxy analysis of QTL section, including grain size, carbonate, TOC, C/N and delta C-13 of organic matter, was used to document regional climatic changes during 9-3 cal ka B.P. The record shows a major environmental change at 9.0-7.8 cal ka B.P., attributed to a climate trend towards warmth and humidity. This event was followed by a typical regional drought event which occurred during 7.8-7.5 cal ka B.P. And a warm and humid climate prevailed from 7.5 to 5.0 cal ka B.P., attributed to the warm/humid Holocene Optimum in this region. After that, the climate gradually became drier. Moreover, comparison of the climate record from this paper with the summer insolation at 30 degrees N indicates that the climate pattern reflecting the Asian monsoon changes was caused by insolation change.
关键词East Asian Monsoon Region Holocene Lacustrine Sediment Climate Change
WOS标题词Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]INNER-MONGOLIA ; LAKE-SEDIMENTS ; PALEOCLIMATIC CHANGES ; NORTHWESTERN CHINA ; NW CHINA ; C-13/C-12 ; EVOLUTION ; RATIOS ; BASIN
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Environmental Sciences
WOS记录号WOS:000254708000006
引用统计
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/5813
专题青海盐湖研究所知识仓储
作者单位1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
2.Lanzhou Univ, Sch Resources & Environm, Lanzhou 730000, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
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Long Hao,Tan Hongbin,Wang Naiang,et al. Mid-Holocene climate variations recorded by palaeolake in marginal area of east Asian monsoon: A multi-proxy study[J]. CHINESE GEOGRAPHICAL SCIENCE,2007,17(4):325-332.
APA Long Hao,Tan Hongbin,Wang Naiang,Tan Liangcheng,&Li Yu.(2007).Mid-Holocene climate variations recorded by palaeolake in marginal area of east Asian monsoon: A multi-proxy study.CHINESE GEOGRAPHICAL SCIENCE,17(4),325-332.
MLA Long Hao,et al."Mid-Holocene climate variations recorded by palaeolake in marginal area of east Asian monsoon: A multi-proxy study".CHINESE GEOGRAPHICAL SCIENCE 17.4(2007):325-332.
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