干旱区生态环境知识资源中心(Arid): Low Dust Generation Potential From Active Sand Grains by Wind Abrasion

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DOI	10.1029/2020JF005545
	Low Dust Generation Potential From Active Sand Grains by Wind Abrasion
	Swet, N.; Kok, J. F.; Huang, Y.; Yizhaq, H.; Katra, I
通讯作者	Swet, N
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
ISSN	2169-9003
EISSN	2169-9011
出版年	2020
卷号	125 期号:7
英文摘要	Wind-driven dust emission has a major impact on many environmental and socioeconomic issues such as climate change, soil loss, biogeochemical cycles, and air pollution. It is generally assumed that the main global dust sources consist of nonsandy soils with high percentages of fine-sized clay and silt particles. However, in recent years, it has been hypothesized that active sand bodies can generate significant dust emissions through the mechanism of sand abrasion. Moreover, sand abrasion has been used to explain the formation of certain soils on Earth and Mars. Here, we test the hypothesis that sand abrasion can generate substantial dust emissions by performing targeted wind tunnel experiments on sand grains in the absence of clay and silt particles. We find only minor emissions of particulate matter from noncoated active sands under wind conditions typical of natural sand transport. The findings suggest that the dust generated by the mechanism of sand abrasion is less than dust generated by the removal of clay minerals coated on sand grain surfaces; both mechanisms on active sands produce far less dust than nonsandy soils. Feldspar sand was found to be slightly more effective at generating dust through abrasion than quartz sand. However, due to the low spatial coverage of feldspar sands in active sands worldwide, dust generated from feldspar abrasion may produce a relatively small contribution to global dust emissions. We thus conclude that sand abrasion by wind transport has a low potential to generate dust-sized particles from active sands.
英文关键词	aeolian abrasion quartz wind tunnel sandblasting efficiency dust emission particle size distribution
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000555444100012
WOS关键词	AEOLIAN ABRASION ; DESERT DUST ; TUNNEL SIMULATION ; PM10 EMISSION ; EOLIAN SAND ; ROUNDNESS ; QUARTZ ; MODEL ; TRANSPORT ; LOESS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	Ben-Gurion University of the Negev ; 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/2XILL650/325379
作者单位	[Swet, N.; Katra, I] Ben Gurion Univ Negev, Dept Geog & Environm Dev, Beer Sheva, Israel; [Kok, J. F.; Huang, Y.] Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA; [Yizhaq, H.] Ben Gurion Univ Negev, Dept Solar Energy & Environm Phys, BIDR, Beer Sheva, Israel
推荐引用方式 GB/T 7714	Swet, N.,Kok, J. F.,Huang, Y.,et al. Low Dust Generation Potential From Active Sand Grains by Wind Abrasion[J]. Ben-Gurion University of the Negev, University of California, Los Angeles,2020,125(7).
APA	Swet, N.,Kok, J. F.,Huang, Y.,Yizhaq, H.,&Katra, I.(2020).Low Dust Generation Potential From Active Sand Grains by Wind Abrasion.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,125(7).
MLA	Swet, N.,et al."Low Dust Generation Potential From Active Sand Grains by Wind Abrasion".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 125.7(2020).