DOI: 10.1002/jgrd.50655
论文题名: Phase partitioning of soluble trace gases with size-resolved aerosols in near-surface continental air over northern Colorado, USA, during winter
作者: Young A.H. ; Keene W.C. ; Pszenny A.A.P. ; Sander R. ; Thornton J.A. ; Riedel T.P. ; Maben J.R.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 16 起始页码: 9414
结束页码: 9427
语种: 英语
Scopus关键词: Gases
; Absolute values
; Aerosol composition
; Henry's Law constant
; Ionic composition
; Meteorological condition
; National Oceanic and Atmospheric Administration
; Phase partitioning
; Thermodynamic evaluation
; Atmospheric aerosols
; acid
; aerosol
; chlorine
; limiting factor
; mixing ratio
; observational method
; pH
; solubilization
; thermodynamics
; trace gas
; Colorado
; United States
英文摘要: During the Nitrogen, Aerosol Composition, and Halogens on a Tall Tower campaign at the National Oceanic and Atmospheric Administration Boulder Atmospheric Observatory tower, Erie, CO, USA, in winter 2011, soluble trace gases, the ionic composition of size-resolved aerosols, and the associated meteorological conditions were measured. Median gas-phase mixing ratios of HCl, HNO3 , and NH3 were 0.072, 0.202, and 5.79 nmol mol-1, respectively. Most aerosol Cl- was associated with supermicrometer size fractions whereas NO3 - and NH4 + were associated primarily with submicrometer size fractions. Aerosol pHs inferred from the measured phase partitioning and thermodynamic properties of HNO3 and NH3 were similar both in terms of absolute values and variability as a function of size. Aerosols were acidic across all size fractions and throughout the duration of the campaign (mostly in the pH range of 2 to 3). The pHs inferred from the HCl/Cl- couple were consistently higher by about 1 to 2 pH units, suggesting possible bias in the associated thermodynamic evaluation of HCl. Specifically, relative to those for HNO 3 and NH3, the Henry's law constant for HCl is associated with much greater uncertainty. Condensation of HCl replaced Cl- consumed in the production of ClNO2 . Additionally, total Cl (HCl + Cl-) was greater than ClNO2 in sampled air parcels, suggesting that Cl availability was not the limiting factor in ClNO2 production. Median ClNO2 yields from N2 O5 reaction with particulate Cl- associated with all size fractions were greater than 0.9. © 2013. Her Majesty the Queen in Right of Canada. American Geophysical Union. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63416
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: Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Morse Hall, 8 College Rd., Durham, NH 03824-3525, United States; Department of Environmental Sciences, University of Virginia, Charlottesville, VA, United States; Air Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States
Recommended Citation:
Young A.H.,Keene W.C.,Pszenny A.A.P.,et al. Phase partitioning of soluble trace gases with size-resolved aerosols in near-surface continental air over northern Colorado, USA, during winter[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(16)