干旱区生态环境知识资源中心(Arid): Field observations of sand flux and dust emission above a gobi desert surface

Arid

DOI	10.1007/s11368-021-02883-5
	Field observations of sand flux and dust emission above a gobi desert surface
	Wang, Xuesong; Zhang, Chunlai
通讯作者	Zhang, CL (corresponding author), Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, MOE Engn Res Ctr Desertificat & Blown Sand Contro, Fac Geog Sci, 19 Xinjiekouwai St, Beijing 100875, Peoples R China.
来源期刊	JOURNAL OF SOILS AND SEDIMENTS
ISSN	1439-0108
EISSN	1614-7480
出版年	2021
卷号	21 期号:4 页码:1815-1825
英文摘要	Purpose Gobi deserts are a major source of natural and anthropogenic aerosols in China. However, the characteristics of the sand flow and dust emission processes are still an open question. This study intends to accurately describe the characteristics of the sand flow and dust emission and to determine the relationship between the sand transport rate and the vertical dust flux above a gobi surface. Materials and methods In this study, a field observation was conducted over a gobi (gravel) desert surface (Yangguan Gobi Desert, Gansu Province, China). We investigated the wind velocity, sand flux, and concentration of particles smaller than 10 mu m (PM10) by using cup anemometers, a sonic anemometer, sand traps, and DustTrak. Results and discussion We found that (1) piecewise regression described the vertical sand flux profiles; the upper part of the profile (above 17 cm) should be described by a power function and the lower part should be described by a Gaussian function. (2) An empirical model based on the modified Owen equation could predict the sand transport rate accurately. (3) The vertical dust flux was described well by F-v proportional to u()(3) and the dust emission above the gobi surface should follow A rho u(t) (u()(2) - u(t)(2)), where A is an empirical regression coefficient. (4) The efficiency of saltation bombardment (F-v/Q) was linearly related to the ratio u(t)/u(). Conclusions The results of this study show that the characteristics of the sand flow and dust emission above a gobi surface were highly different from those of bare sandy surface. In future research, it will be necessary to account for the effect of surface characteristics, and particularly the characteristics of the gravel, to improve the predictive ability of our model.
英文关键词	Sand transport rate Dust emission Gobi desert Model Vertical dust flux
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000621263400002
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350995
作者单位	[Wang, Xuesong; Zhang, Chunlai] Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, MOE Engn Res Ctr Desertificat & Blown Sand Contro, Fac Geog Sci, 19 Xinjiekouwai St, Beijing 100875, Peoples R China; [Wang, Xuesong] Beijing Normal Univ, Sch Environm, 19 Xinjiekouwai St, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xuesong,Zhang, Chunlai. Field observations of sand flux and dust emission above a gobi desert surface[J]. 北京师范大学,2021,21(4):1815-1825.
APA	Wang, Xuesong,&Zhang, Chunlai.(2021).Field observations of sand flux and dust emission above a gobi desert surface.JOURNAL OF SOILS AND SEDIMENTS,21(4),1815-1825.
MLA	Wang, Xuesong,et al."Field observations of sand flux and dust emission above a gobi desert surface".JOURNAL OF SOILS AND SEDIMENTS 21.4(2021):1815-1825.