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学科主题: Environmental Sciences
题名: Pleniglacial millennium-scale climate variations in northern China based on records from the Salawusu River Valley
作者: Wang, FN ; Li, BS ; Wang, JL ; Wen, XH ; Niu, DF ; Li, ZW ; Si, YJ ; Guo, YH ; Du, SH
通讯作者: libsh@scnu.edu.cn
关键词: Salawusu River Valley ; Pleniglacial ; paleoclimatic indices ; CaCO3 ; grain-size
刊名: JOURNAL OF ARID LAND
发表日期: 2012
卷: 4, 期:3, 页:231-240
部门归属: [Wang, FengNian; Li, BaoSheng; Wen, XiaoHao; Niu, DongFeng; Si, YueJun; Guo, YiHua] S China Normal Univ, Sch Geog, Guangzhou 510631, Guangdong, Peoples R China; [Li, BaoSheng] Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China; [Wang, JiangLong] Chenghai Middle Sch, Shantou 510601, Peoples R China; [Li, ZhiWen] E China Inst Technol, Coll Earth Sci, Nanchang 330013, Peoples R China; [Du, ShuHuan] Chinese Acad Sci, S China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
项目归属: 海洋地质
摘要: Situated in the Salawusu River Valley, southeast of China's Mu Us Desert, the MGS2 (Milanggouwan section) portion of the Milanggouwan stratigraphic section records 5.5 sedimentary cycles consisting of alternations between dune sand deposits and fluvial or lacustrine facies. We analyzed the grain-size and CaCO3 distributions in MGS2, and found that Mz (mean particle diameter) and a (standard deviation) displayed clear variations in peaks and valleys within different sedimentary facies. The CaCO3 content averaged 0.4% in the dune sand deposits, 1.43% in the fluvial facies, and 8.82% in the lacustrine facies. Both the grain-size distribution and CaCO3 contents, which equal the indicators for the alternation among the sedimentary fades, suggest the occurrence of 5.5 cycles. These results suggest that the observed cycles mainly resulted from fluctuations between a cold and dry winter monsoon climate and a warm and humid summer monsoon climate, and that the MGS2 portion experienced at least 5.5 fluctuations between these two extremes. This high-frequency climatic fluctuation indicates a strong influence of millennium-scale variations in the strength of the East Asian winter and summer monsoons in our study area during the Pleniglacial.
语种: 英语
WOS记录号: WOS:000307201200001
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10317
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Wang, FN; Li, BS; Wang, JL; Wen, XH; Niu, DF; Li, ZW; Si, YJ; Guo, YH; Du, SH.Pleniglacial millennium-scale climate variations in northern China based on records from the Salawusu River Valley,JOURNAL OF ARID LAND,2012,4(3):231-240
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