Characterization of MASDs of surface soils in north China and its influence on estimating dust emission

doi:10.1360/03wd0361

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

	Characterization of MASDs of surface soils in north China and its influence on estimating dust emission
	Mei, FM; Zhang, XY; Lu, HY; Shen, ZX; Wang, YQ
	2004-10
发表期刊	CHINESE SCIENCE BULLETIN
卷号	49 期号:20 页码:2169-2176
文章类型	Article
摘要	The micro-aggregated size distribution (MASD) of surface soil is an important parameter for modelling dust emission. However, there is no dataset of MASDs of all surface soil types in north China. The MASDs are here presented, measured by dry sieving, for typical surface soil samples, including sandy soil, gravelly sand soil, gravelly loam soil, loam soil and silt loam soil, collected from sandy deserts, Gobi deserts, oases, farmlands in steppe regions and steppe areas in north China. The NIASDs of various surface soil types exhibit a combination of several log-normal distributions of five separated sizes with mean mass median diameters (MMDs) of 90, 210, 390, 600 and 980 mum, respectively. and mean standard deviations (SDs) of 1.25, 1.40, 1.25, 1.35 and 1.25 respectively. The log-normal distributions correspond to very fine sand, fine sand, medium sand, coarse sand and very coarse sand population. On the basis of characterization of the retrieved MASDs of various surface soil types in north China, dust emission fluxes are modelled by a dust production model (DPM model). It is shown that dust emission has been significantly influenced by NIASDs. Fine sand and very fine sand are always associated with the highest dust emission fluxes. Emission fluxes of the medium sand, gravelly sand soil, gravelly loam soil and loam soil are lower than those of very fine sand and fine sand, but larger than those of the coarse sand. The differences in dust emission fluxes vary among the different soil types from 10(1) to 10(3) mug (.) m(-2) (.) s(-1). Dust emission fluxes from sandy deserts and farmlands covered with sand sheets in north China rang from 10(1) to 10(4) mug (.) m(-2) (.) s(-1) while those from Gobi deserts, farmlands and steppes with gravelly desertification range from 10(1) to 10(2) mug (.) m(-2) (.) s(-1). The modelled results indicate that deserts and farmlands with sand are the major, dust sources in north China.
关键词	north China micro-aggregated size distribution of soil saltation flux dust emission flux
学科领域	Science & Technology - Other Topics
DOI	10.1360/03wd0361
关键词[WOS]	MINERAL AEROSOL PRODUCTION ; SIZE-DISTRIBUTION ; WIND EROSION ; DESERT ; DISTRIBUTIONS ; CYCLE ; MODEL
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Multidisciplinary Sciences
WOS记录号	WOS:000226271000011
出版者	SCIENCE PRESS
引用统计	被引频次：23[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/361006/11999
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	Mei, FM,Zhang, XY,Lu, HY,et al. Characterization of MASDs of surface soils in north China and its influence on estimating dust emission[J]. CHINESE SCIENCE BULLETIN,2004,49(20):2169-2176.
APA	Mei, FM,Zhang, XY,Lu, HY,Shen, ZX,&Wang, YQ.(2004).Characterization of MASDs of surface soils in north China and its influence on estimating dust emission.CHINESE SCIENCE BULLETIN,49(20),2169-2176.
MLA	Mei, FM,et al."Characterization of MASDs of surface soils in north China and its influence on estimating dust emission".CHINESE SCIENCE BULLETIN 49.20(2004):2169-2176.