Bimodal grain-size distribution of Chinese loess, and its palaeoclimatic implications

doi:10.1016/S0341-8162(03)00109-7

	Bimodal grain-size distribution of Chinese loess, and its palaeoclimatic implications
	Sun, DH ; Bloemendal, J ; Rea, DK ; An, ZS ; Vandenberghe, J ; Lu, HY ; Su, RX ; Liu, TS
刊名	CATENA
	2004-02-22
卷号	55 期号:3 页码:325-340
关键词	Loess Grain Size Atmospheric Circulation China
ISSN号	0341-8162
DOI	10.1016/S0341-8162(03)00109-7
文献子类	Article
英文摘要	Grain-size analysis indicates that Chinese loess generally shows a bimodal distribution with a coarse and a fine component. The coarse component, comprising the main part of the loess, has pronounced kurtosis and is well sorted, which is interpreted to be the product of dust storms generated by low-altitude northwesterly winds. Its grain-size reflects the strength of the low-altitude circulation in the dust seasons of the year, and its percentage provides an indicator of the source area aridity and the frequency of dust storms. Conversely, the fine component has a wide grain-size range and is poorly sorted. Sedimentary illustrations based on the grain-size distribution characteristics of bulk samples and of detrital quartz suggest that the fine component probably represents the background dust load of the atmosphere and is mainly transported by high-altitude westerly airstreams. Its grain-size provides an estimate of the westerly air stream intensity. The coarse and fine components of a loess sample can be mathematically separated by fitting a designated mathematical distribution function to the measured grain-size data, and this procedure constitutes an approach for reconstructing the palaeowind system of Northern China. (C) 2003 Elsevier B.V. All rights reserved.
WOS关键词	UNFLOCCULATED SEDIMENTS ; DEPOSITIONAL PROCESSES ; ROUND DISTRIBUTIONS ; MINERAL AEROSOLS ; NORTH PACIFIC ; WIND ; FREQUENCY ; PLATEAU ; TRANSPORT ; HISTORY
WOS研究方向	Geology ; Agriculture ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000188981300004
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/64730]
专题	中国科学院地质与地球物理研究所
通讯作者	Sun, DH
作者单位	1.Chinese Acad Sci, S China Sea Inst Oceanog, Guangzhou 510301, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 3.Univ Liverpool, Dept Geog, Liverpool L69 3BX, Merseyside, England 4.Univ Michigan, Dept Geol Sci, Ann Arbor, MI 48109 USA 5.Free Univ Amsterdam, Fac Earth Sci, NL-1081 HV Amsterdam, Netherlands 6.Chinese Acad Sci, Inst Geol, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Sun, DH,Bloemendal, J,Rea, DK,et al. Bimodal grain-size distribution of Chinese loess, and its palaeoclimatic implications[J]. CATENA,2004,55(3):325-340.
APA	Sun, DH.,Bloemendal, J.,Rea, DK.,An, ZS.,Vandenberghe, J.,...&Liu, TS.(2004).Bimodal grain-size distribution of Chinese loess, and its palaeoclimatic implications.CATENA,55(3),325-340.
MLA	Sun, DH,et al."Bimodal grain-size distribution of Chinese loess, and its palaeoclimatic implications".CATENA 55.3(2004):325-340.