Surface renewal as a significant mechanism for dust emission

doi:10.5194/acp-16-15517-2016

	Surface renewal as a significant mechanism for dust emission
	Zhang, J; Teng, ZJ; Huang, N; Guo, L; Shao, YP; Huang, N (reprint author), Lanzhou Univ, Minist Educ, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Peoples R China.; Huang, N (reprint author), Lanzhou Univ, Sch Civil Engn & Mech, Lanzhou 730000, Peoples R China.
刊名	ATMOSPHERIC CHEMISTRY AND PHYSICS
	2016-12-15
卷号	16 期号:1-24 页码:15517-15528
ISSN号	1680-7316
DOI	10.5194/acp-16-15517-2016
文献子类	Article
英文摘要	Wind tunnel experiments of dust emissions from different soil surfaces are carried out to better understand dust emission mechanisms. The effects of surface renewal on aerodynamic entrainment and saltation bombardment are analyzed in detail. It is found that flow conditions, surface particle motions (saltation and creep), soil dust content and ground obstacles all strongly affect dust emission, causing its rate to vary over orders of magnitude. Aerodynamic entrainment is highly effective, if dust supply is unlimited, as in the first 2-3 min of our wind tunnel runs. While aerodynamic entrainment is suppressed by dust supply limits, surface renewal through the motion of surface particles appears to be an effective pathway to remove the supply limit. Surface renewal is also found to be important to the efficiency of saltation bombardment. We demonstrate that surface renewal is a significant mechanism affecting dust emission and recommend that this mechanism be included in future dust models.
学科主题	Meteorology & Atmospheric Sciences
出版地	GOTTINGEN
资助项目	国家自然科学基金项目 ; 中央高校基本科研业务费专项资金
项目编号	State Key Program of National Natural Science Foundation of China [91325203] ; National Natural Science Foundation of China [41371034, 11602100] ; Innovative Research Group of the National Natural Science Foundation of China [11421062] ; Fundamental Research Funds for the Central Universities [lzujbky-2014-1] ; Hebei Province Department of Education Fund [QN2014111]
语种	英语
WOS记录号	WOS:000391486900006
资助机构	NSFC ; LZU
内容类型	期刊论文
源URL	[http://ir.lzu.edu.cn/handle/262010/189440]
专题	土木工程与力学学院_期刊论文
通讯作者	Huang, N (reprint author), Lanzhou Univ, Minist Educ, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Peoples R China.; Huang, N (reprint author), Lanzhou Univ, Sch Civil Engn & Mech, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Zhang, J,Teng, ZJ,Huang, N,et al. Surface renewal as a significant mechanism for dust emission[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2016,16(1-24):15517-15528.
APA	Zhang, J.,Teng, ZJ.,Huang, N.,Guo, L.,Shao, YP.,...&Huang, N .(2016).Surface renewal as a significant mechanism for dust emission.ATMOSPHERIC CHEMISTRY AND PHYSICS,16(1-24),15517-15528.
MLA	Zhang, J,et al."Surface renewal as a significant mechanism for dust emission".ATMOSPHERIC CHEMISTRY AND PHYSICS 16.1-24(2016):15517-15528.