干旱区生态环境知识资源中心(Arid): Size-Independent Susceptibility to Transport in Aeolian Saltation

Arid

DOI	10.1029/2019JF005104
	Size-Independent Susceptibility to Transport in Aeolian Saltation
	Martin, Raleigh L.; Kok, Jasper F.
通讯作者	Martin, Raleigh L.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
ISSN	2169-9003
EISSN	2169-9011
出版年	2019
卷号	124 期号:7 页码:1658-1674
英文摘要	Natural wind-eroded soils contain a mixture of particle sizes. However, models for aeolian saltation are typically derived for sediment bed surfaces containing only a single particle size. To nonetheless treat natural mixed beds, models for saltation and associated dust aerosol emission have typically simplified aeolian transport either as a series of noninteracting single particle size beds or as a bed containing only the median or mean particle size. Here we test these common assumptions underpinning aeolian transport models using measurements of size-resolved saltation fluxes at three natural field sites. We find that a wide range of sand size classes experience equal susceptibility to saltation at a single common threshold wind shear stress, contrary to the selective susceptibility expected for treatment of a mixed bed as multiple single particle size beds. Our observation of equal susceptibility refutes the common simplification of saltation as a series of noninteracting single particle sizes. Sand transport and dust emission models that use this incorrect assumption can be both simplified and improved by instead using a single particle size representative of the mixed bed.
英文关键词	aeolian processes saltation particle size distribution wind erosion sediment transport dust emission
类型	Article
语种	英语
国家	USA
开放获取类型	Bronze, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000481444100002
WOS关键词	GRAIN-SIZE ; WIND-TUNNEL ; SAND ; DUST ; MODEL ; ENTRAINMENT ; PARTICLES ; DESERT ; FLUX ; DISTRIBUTIONS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	University of California, Los Angeles
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217094
作者单位	Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA
推荐引用方式 GB/T 7714	Martin, Raleigh L.,Kok, Jasper F.. Size-Independent Susceptibility to Transport in Aeolian Saltation[J]. University of California, Los Angeles,2019,124(7):1658-1674.
APA	Martin, Raleigh L.,&Kok, Jasper F..(2019).Size-Independent Susceptibility to Transport in Aeolian Saltation.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,124(7),1658-1674.
MLA	Martin, Raleigh L.,et al."Size-Independent Susceptibility to Transport in Aeolian Saltation".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 124.7(2019):1658-1674.