Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD025830 |
Sources and composition of PM2.5 in the Colorado Front Range during the DISCOVER-AQ study | |
Valerino, M. J.1; Johnson, J. J.1; Izumi, J.1; Orozco, D.2,3; Hoff, R. M.2,4; Delgado, R.4; Hennigan, C. J.1 | |
2017 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Measurements of particulate matter (PM2.5) chemical composition were carried out in Golden, CO, during the Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) field study. Chemical composition was dominated by organic compounds, which comprised an average of 75% of the PM2.5 mass throughout the study. Most of the organic matter was secondary (i.e., secondary organic aerosol) and appears to derive predominantly from regional sources, rather than the Denver metropolitan area. The concentration and composition of PM2.5 in Golden were strongly influenced by highly regular wind patterns and the site's close proximity to the mountains (similar to 5 km). This second factor may be the cause of distinct differences between observations in Golden and those in downtown Denver, despite a distance between the sites of only similar to 15 km. Concentrations of aerosol nitrate, ammonium, and elemental carbon increased significantly during the daytime when the winds were from the northeast, indicating a strong local source for these compounds. Local sources of dust appeared to minimally impact the Golden site, although this was not likely representative of other conditions in the Colorado Front Range. Conversely, dust that had undergone long-range transport from the southwestern U.S. likely impacted the entire Colorado Front Range, including Golden. During this event, water-soluble Ca2+ concentrations exceeded 1 mu gm(-3), and the PM2.5/PM10 ratio reached its lowest level throughout the study. The long-range transport of wildfire emissions also impacted the Colorado Front Range for 1-2 days during DISCOVER-AQ. The smoke event was characterized by high concentrations of organics and water-soluble K+. The results show a complex array of sources, and atmospheric processes influence summertime PM in the Colorado Front Range. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000393877800032 |
WOS关键词 | ORGANIC AEROSOL ; PARTICULATE MATTER ; AIRBORNE MEASUREMENTS ; MASS CONCENTRATIONS ; OPTICAL-PROPERTIES ; EMISSIONS ; BALTIMORE ; SECONDARY ; HEALTH ; MODEL |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | 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/33576 |
专题 | 气候变化 |
作者单位 | 1.Univ Maryland Baltimore Cty, Dept Chem Biochem & Environm Engn, Baltimore, MD 21228 USA; 2.Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21228 USA; 3.Maryland Dept Environm, Baltimore, MD 21224 USA; 4.Univ Maryland Baltimore Cty, Joint Ctr Earth Syst Technol, Baltimore, MD 21228 USA |
推荐引用方式 GB/T 7714 | Valerino, M. J.,Johnson, J. J.,Izumi, J.,et al. Sources and composition of PM2.5 in the Colorado Front Range during the DISCOVER-AQ study[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(1). |
APA | Valerino, M. J..,Johnson, J. J..,Izumi, J..,Orozco, D..,Hoff, R. M..,...&Hennigan, C. J..(2017).Sources and composition of PM2.5 in the Colorado Front Range during the DISCOVER-AQ study.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(1). |
MLA | Valerino, M. J.,et al."Sources and composition of PM2.5 in the Colorado Front Range during the DISCOVER-AQ study".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.1(2017). |
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