气候变化领域集成服务门户(CCPortal): Influence of Wind Velocity and Soil Size Distribution on Emitted Dust Size Distribution: A Wind Tunnel Study

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DOI	10.1029/2020JD033768
	Influence of Wind Velocity and Soil Size Distribution on Emitted Dust Size Distribution: A Wind Tunnel Study
	Wang R.; Li Q.; Wang R.; Chang C.; Guo Z.; Li J.; Zhou N.
发表日期	2021
ISSN	2169897X
卷号	126 期号:7
英文摘要	The question of whether the emitted dust size distribution (EDSD) depends on wind velocity or soil size distribution (SSD) remains to be resolved. This study used wind tunnel tests to investigate the influence of wind velocity and SSD on EDSD. The results showed that EDSD was influenced by both wind velocity and soil texture, supporting the saltation bombardment theory. The ratios of PM2.5 to PM10 (RPM2.5/10) and PM1.0 to PM10 (RPM1.0/10), which reflect the EDSD in the range of 0–10 μm, both showed trends of increase with increasing friction velocity (u) for all six tested soils. The trend of increase was more significant for RPM1.0/10 than for RPM2.5/10, which indicates that the content of finer dust in the range 0–10 μm increased with increasing u. When u* increased from 0.51 to 0.68 m s−1, the ranges of increase for RPM2.5/10 and RPM1.0/10 were most significant for sandy soils, followed by sandy loam soils and then loamy soils, indicating that the effect of wind velocity on EDSD increased with increasing sand content in the soils. The EDSD was also influenced significantly by the fully dispersed SSD, especially the sand and silt contents in the soils. The RPM2.5/10 and RPM1.0/10 increased (decreased) logarithmically (linearly) with increasing sand (silt) content in these soils. The finding of this study represents enrichment of data regarding EDSD, which could lead to greater understanding of the roles of wind velocity and SSD in relation to EDSD. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	emitted dust size distribution; ratio of PM2.5 to PM10; soil size distribution; wind tunnel test; wind velocity
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185325
作者单位	Institute of Geographical Sciences, Heibei Academy of Sciences, Hebei Engineering Research Center for Geographic Information Application, Shijiazhuang, China; College of Resource and Environment Sciences, Hebei Key Laboratory of Environmental Change and Ecological Construction, Hebei Normal University, Shijiazhuang, China; College of Management Science and Engineering, Hebei University of Economics and Business, Shijiazhuang, China
推荐引用方式 GB/T 7714	Wang R.,Li Q.,Wang R.,et al. Influence of Wind Velocity and Soil Size Distribution on Emitted Dust Size Distribution: A Wind Tunnel Study[J],2021,126(7).
APA	Wang R..,Li Q..,Wang R..,Chang C..,Guo Z..,...&Zhou N..(2021).Influence of Wind Velocity and Soil Size Distribution on Emitted Dust Size Distribution: A Wind Tunnel Study.Journal of Geophysical Research: Atmospheres,126(7).
MLA	Wang R.,et al."Influence of Wind Velocity and Soil Size Distribution on Emitted Dust Size Distribution: A Wind Tunnel Study".Journal of Geophysical Research: Atmospheres 126.7(2021).