干旱区生态环境知识资源中心(Arid): Electrostatic forces alter particle size distributions in atmospheric dust

Arid

DOI	10.5194/acp-20-3181-2020
	Electrostatic forces alter particle size distributions in atmospheric dust
	Toth, Joseph R., III 1; Rajupet, Siddharth 1; Squires, Henry 1; Volbers, Blaire 1; Zhou, Jun 2,3; Xie, Li 2,3; Sankaran, R. Mohan 1; Lacks, Daniel J.1
通讯作者	Lacks, Daniel J.
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN	1680-7316
EISSN	1680-7324
出版年	2020
卷号	20 期号:5 页码:3181-3190
英文摘要	Large amounts of dust are lofted into the atmosphere from arid regions of the world before being transported up to thousands of kilometers. This atmospheric dust interacts with solar radiation and causes changes in the climate, with larger-sized particles having a heating effect, and smaller-sized particles having a cooling effect. Previous studies on the long-range transport of dust have found larger particles than expected, without a model to explain their transport. Here, we investigate the effect of electric fields on lofted airborne dust by blowing sand through a vertically oriented electric field, and characterizing the size distribution as a function of height. We also model this system, considering the gravitational, drag, and electrostatic forces on particles, to understand the effects of the electric field. Our results indicate that electric fields keep particles suspended at higher elevations and enrich the concentration of larger particles at higher elevations. We extend our model from the small-scale system to long-range atmospheric dust transport to develop insights into the effects of electric fields on size distributions of lofted dust in the atmosphere. We show that the presence of electric fields and the resulting electrostatic force on charged particles can help explain the transport of unexpectedly large particles and cause the size distribution to become more uniform as a function of elevation. Thus, our experimental and modeling results indicate that electrostatic forces may in some cases be relevant regarding the effect of atmospheric dust on the climate.
类型	Article
语种	英语
国家	USA ; Peoples R China
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000521140400001
WOS关键词	MINERAL DUST ; CONTACT ELECTRIFICATION ; SAHARAN DUST ; CHARGE ; TRANSPORT ; FIELD
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314136
作者单位	1.Case Western Reserve Univ, Dept Chem & Biomol Engn, Cleveland, OH 44106 USA; 2.Minist Educ China, Key Lab Mech Disaster & Environm Western China, Lanzhou 7300000, Gansu, Peoples R China; 3.Lanzhou Univ, Coll Civil Engn & Mech, Lanzhou 7300000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Toth, Joseph R., III,Rajupet, Siddharth,Squires, Henry,et al. Electrostatic forces alter particle size distributions in atmospheric dust[J]. 兰州大学,2020,20(5):3181-3190.
APA	Toth, Joseph R., III.,Rajupet, Siddharth.,Squires, Henry.,Volbers, Blaire.,Zhou, Jun.,...&Lacks, Daniel J..(2020).Electrostatic forces alter particle size distributions in atmospheric dust.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(5),3181-3190.
MLA	Toth, Joseph R., III,et al."Electrostatic forces alter particle size distributions in atmospheric dust".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.5(2020):3181-3190.