DOI: 10.1002/2013JD019923
论文题名: Vertically resolved chemical characteristics and sources of submicron aerosols measured on a Tall Tower in a suburban area near Denver, Colorado in winter
作者: Öztürk F. ; Bahreini R. ; Wagner N.L. ; Dubé W.P. ; Young C.J. ; Brown S.S. ; Brock C.A. ; Ulbrich I.M. ; Jimenez J.L. ; Cooper O.R. ; Middlebrook A.M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 24 起始页码: 13591
结束页码: 13605
语种: 英语
英文关键词: aerosol vertical profile
; C-ToF-AMS
; cluster analysis
; NACHTT
Scopus关键词: Aerosols
; Chlorine compounds
; Cluster analysis
; Loading
; Mass spectrometers
; Mass spectrometry
; Nitrates
; Sulfur compounds
; Towers
; Urban growth
; Aerosol concentration
; Aerosol mass concentration
; Aerosol vertical profiles
; C-ToF-AMS
; Chemical characteristic
; NACHTT
; Positive Matrix Factorization
; Time-of-flight aerosol mass spectrometers
; Atmospheric movements
; aerosol
; atmospheric pollution
; chemical composition
; cluster analysis
; emission
; inorganic salt
; long range transport
; particulate matter
; pollutant source
; suburban area
; urban pollution
; Colorado
; Denver
; United States
英文摘要: The Nitrogen, Aerosol Composition, and Halogens on a Tall Tower study was conducted at the Boulder Atmospheric Observatory in Colorado during February-March 2011. A compact time-of-flight aerosol mass spectrometer was installed in a moving carriage on the tower, obtaining vertical profiles of submicron nonrefractory aerosol mass concentrations (PM1nr) from 0-265 m above ground level. The average PM1nr was 4.6 ± 5.7 μg/m3, with average contributions of nitrate, organics, sulfate, ammonium, and chloride of 35%, 26%, 20%, 17%, and 1%, respectively. Positive Matrix Factorization analysis of the organic aerosol (OA) mass spectra indicated that average contributions of oxygenated organic aerosol (OOA)-I, OOA-II, and hydrocarbon-like organic aerosol (surrogates for aged and fresh secondary OA and primary OA, respectively) to OA mass were 52%, 32%, and 16%, respectively. There was considerable variability in the vertical profiles of aerosol mass loading and composition, especially at the lowest heights. Below 40 m, the highest PM1nr concentrations were composed of mostly nitrate (30-46%) and were associated with winds from the northeast where there are large agricultural facilities. When winds were southerly, PM1nr mass distributions near the surface had small, fresh OA, indicating the influence of nearby Denver urban emissions at the site. The largest contribution to OA mass at these heights was OOA-II (~43%). Between 40 and 120 m, trajectory cluster analysis indicated that during high-altitude long-range transport events, daytime aerosol composition was dominated by sulfate, whereas during low-altitude transport events, the contributions of sulfate, nitrate, and OA were comparable. OOA-I contributed the most (53-68%) to OA mass at these tower heights. Key Points Aerosol concentrations were low above 120 m of tower height Regional transport (local pollution) influenced aerosol at 40-120 m (40 m) On average organic aerosol was dominated by the highly oxygenated fraction ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63081
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Environmental Engineering Department, Faculty of Engineering and Architecture, Abant Izzet Baysal University, 14280, Bolu, Turkey; NOAA Earth System Research Laboratory, Chemical Sciences Division, Boulder CO, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder CO, United States; Department of Environmental Sciences, University of California, Riverside CA, United States; Department of Chemistry, Memorial University of Newfoundland, NL, Canada; Department of Chemistry and Biochemistry, University of Colorado, Boulder CO, United States
Recommended Citation:
Öztürk F.,Bahreini R.,Wagner N.L.,et al. Vertically resolved chemical characteristics and sources of submicron aerosols measured on a Tall Tower in a suburban area near Denver, Colorado in winter[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(24)