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DOI | 10.5194/acp-17-7775-2017 |
Measurement of scattering and absorption properties of dust aerosol in a Gobi farmland region of northwestern China - a potential anthropogenic influence | |
Bi, Jianrong; Huang, Jianping; Shi, Jinsen; Hu, Zhiyuan; Zhou, Tian; Zhang, Guolong; Huang, Zhongwei; Wang, Xin; Jin, Hongchun | |
2017-06-28 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | We conducted a comprehensive field campaign to explore the optical characteristics of mineral dust in Dunhuang farmland near the Gobi Desert of northwest China during spring of 2012. The day-to-day and diurnal variations of dust aerosol showed prominent features throughout the experiment, primarily attributable to frequent dust events and local anthropogenic emissions. The overall average mass concentrations of the particulate matter with an aerodynamic diameter less than 10 mu m (PM10), light scattering coefficient (sigma(sp), 670), absorption coefficient (sigma(ap),670), and single-scattering albedo (SSA(670)) were 113 +/- 169 mu g m(-3), 53.3 +/- 74.8 Mm(-1), 3.2 +/- 2.4 Mm(-1), and 0.913 +/- 0.05, respectively, which were comparable to the background levels in the southern United States but smaller than those in the eastern and other northwestern Chinese cities. The anthropogenic dust produced by agricultural cultivations (e.g., land planning, plowing, and disking) exerted a significant superimposed effect on high dust concentrations in Dunhuang farmland prior to the growing season (i.e., from 1 April to 10 May). Strong south valley wind and vertical mixing in daytime scavenged the pollution, and the weak northeast mountain wind and stable inversion layer at night favorably accumulated the air pollutants near the surface. In the afternoon (13: 00-18: 00 LT, local time), mean SSA(670) was 0.945 +/- 0.04 predominantly from dust particles, whereas finer particles and lower SSA(670) values (similar to 0.90-0.92) were measured at night, suggesting the potential influence by the mixed dust pollutants. During a typical biomass burning event on 4 April 2012, sigma(ap), 670 increased from similar to 2.0 to 4.75Mm(-1) and SSA(670) changed from similar to 0.90 to similar to 0.83, implying remarkable modification of aerosol absorptive properties induced by human activities. The findings of this study would help to advance an in-depth understanding of the interaction among dust aerosol, atmospheric chemistry, and climate change in a desert source region. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404681400004 |
WOS关键词 | OPTICAL-PROPERTIES ; ASIAN DUST ; ACE-ASIA ; RADIATIVE PROPERTIES ; MINERAL DUST ; DESERT DUST ; IRON-OXIDES ; TAKLIMAKAN DESERT ; SEMIARID CLIMATE ; SKY-RADIOMETER |
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/21665 |
专题 | 地球科学 |
作者单位 | Lanzhou Univ, Coll Atmospher Sci, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou 730000, Peoples R China |
推荐引用方式 GB/T 7714 | Bi, Jianrong,Huang, Jianping,Shi, Jinsen,et al. Measurement of scattering and absorption properties of dust aerosol in a Gobi farmland region of northwestern China - a potential anthropogenic influence[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(12). |
APA | Bi, Jianrong.,Huang, Jianping.,Shi, Jinsen.,Hu, Zhiyuan.,Zhou, Tian.,...&Jin, Hongchun.(2017).Measurement of scattering and absorption properties of dust aerosol in a Gobi farmland region of northwestern China - a potential anthropogenic influence.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(12). |
MLA | Bi, Jianrong,et al."Measurement of scattering and absorption properties of dust aerosol in a Gobi farmland region of northwestern China - a potential anthropogenic influence".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.12(2017). |
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