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DOI | 10.5194/acp-18-17087-2018 |
Quantifying the large-scale electrification equilibrium effects in dust storms using field observations at Qingtu Lake Observatory | |
Zhang, Huan1; Zheng, Xiaojing1,2 | |
2018-12-04 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:23页码:17087-17097 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Dust and sand electrification, which is a ubiquitous phenomenon in dust events, has a potentially dramatic effect on dust and sand lifting and transport processes. However, the effect of such electrification is still largely unclear, mainly due to its complexity and sparse observations. Here, we conducted an extensive observational analysis involving mild and severe dust storms with minimum visibility, ranging from similar to 0.09 to 0.93 km, to assess the electrical properties of airborne dust particles in dust storms. The space charge density has been estimated indirectly based on Gauss's law. Using the wavelet coherence analysis that is a method for evaluating the correlations between two non-stationary time series in the time-frequency domain, we found that the space charge density and dust concentration were significantly correlated over the 10 min timescales (on the order of the typical integral timescale of atmospheric turbulence). We further presented a simple linear regression (SLR) model to quantify such large timescale correlations and found that there was a significant linear relationship between space charge density and dust concentration at given ambient temperature and relative humidity (RH), suggesting that the estimated mean charge-to-mass ratio of dust particles was expected to remain constant (termed as the equilibrium value mu*). In addition, the influences of ambient temperature and RH on mu* were evaluated by a multiple linear regression (MLR) model, showing that the mu* is nonlinearly related to environmental factors. The present study provides observational evidence for the environmental-dependent electrification equilibrium effects in dust storms. This finding may reduce challenges in future quantifications of dust electrification, as it is possible to exclude effects, such as the particles' collisional dynamics, on dust electrification. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000452006200003 |
WOS关键词 | CONTACT ELECTRIFICATION ; ELECTRICAL-PROPERTIES ; RELATIVE-HUMIDITY ; CHARGE ; ATMOSPHERE ; MOTIONS ; LAYER ; IONS ; SAND |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/30456 |
专题 | 地球科学 |
作者单位 | 1.Lanzhou Univ, Key Lab Mech Disaster & Environm Western China, Dept Mech, Minist Educ China, Lanzhou 730000, Gansu, Peoples R China; 2.Xidian Univ, Sch Mechanoelect Engn, Res Ctr Appl Mech, Xian 710071, Shaanxi, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Huan,Zheng, Xiaojing. Quantifying the large-scale electrification equilibrium effects in dust storms using field observations at Qingtu Lake Observatory[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(23):17087-17097. |
APA | Zhang, Huan,&Zheng, Xiaojing.(2018).Quantifying the large-scale electrification equilibrium effects in dust storms using field observations at Qingtu Lake Observatory.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(23),17087-17097. |
MLA | Zhang, Huan,et al."Quantifying the large-scale electrification equilibrium effects in dust storms using field observations at Qingtu Lake Observatory".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.23(2018):17087-17097. |
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