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

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

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（1985-2004）

	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
	2004-02-22
发表期刊	CATENA
卷号	55 期号:3 页码:325-340
文章类型	Article
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.
关键词	loess grain size atmospheric circulation China
学科领域	Geology ; Agriculture ; Water Resources
DOI	10.1016/S0341-8162(03)00109-7
关键词[WOS]	UNFLOCCULATED SEDIMENTS ; DEPOSITIONAL PROCESSES ; ROUND DISTRIBUTIONS ; MINERAL AEROSOLS ; NORTH PACIFIC ; WIND ; FREQUENCY ; PLATEAU ; TRANSPORT ; HISTORY
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:000188981300004
出版者	ELSEVIER SCIENCE BV
引用统计	被引频次：233[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/11851
专题	黄土与第四纪地质国家重点实验室（1985-2004）
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.