Measurements of aromatic hydrocarbon ratios and NOx concentrations in the rural troposphere: Observation of air mass photochemical aging and NOx removal

Roberts, J. M.; Fehsenfeld, F. C.; Liu, Shaw C.; Bollinger, M. J.; Hahn, Carole J.; Albritton, D. L.; Sievers, Robert E.

doi:10.1016/0004-6981(84)90012-x

Cited by 230 publications

(195 citation statements)

References 56 publications

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“…[22] Using the observed ratio between toluene and benzene (assumption 4), the photochemical age, Dt, of the sampled air masses is estimated in this work by [Roberts et al, 1984]:…”

Section: Data Descriptionmentioning

confidence: 99%

“…Using (1) the measurements of an inert pollution tracer (acetylene), (2) hydrocarbon ratios to estimate the photochemical age [Roberts et al, 1984], and (3) the chemical kinetics of the reactions involved, both the removal of primary anthropogenic VOCs and the production of secondary anthropogenic VOCs are described. The analysis of the OVOC and POM measurements is complicated by the potentially significant biogenic sources of these species.…”

Section: Introductionmentioning

confidence: 99%

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Budget of organic carbon in a polluted atmosphere: Results from the New England Air Quality Study in 2002

et al. 2005

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[1] An extensive set of volatile organic compounds (VOCs) and particulate organic matter (POM) was measured in polluted air during the New England Air Quality Study in 2002. Using VOC ratios, the photochemical age of the sampled air masses was estimated. This approach was validated (1) by comparing the observed rates at which VOCs were removed from the atmosphere with the rates expected from OH oxidation, (2) by comparing the VOC emission ratios inferred from the data with the average composition of urban air, and (3) by the ability to describe the increase of an alkyl nitrate with time in terms of the chemical kinetics. A large part of the variability observed for oxygenated VOCs (OVOCs) and POM could be explained by a description that includes the removal of the primary anthropogenic emissions, the formation and removal of secondary anthropogenic species, and a biogenic contribution parameterized by the emissions of isoprene. The OVOC sources determined from the data are compared with the available literature, and a satisfactory agreement is obtained. The observed sub-mm POM was highly correlated with secondary anthropogenic gas-phase species, strongly suggesting that the POM was from secondary anthropogenic sources. The results are used to describe the speciation and total mass of gas-and particle-phase organic carbon as a function of the photochemical age of an urban air mass. Shortly after emission the organic carbon mass is dominated by primary VOCs, while after two days the dominant contribution is from OVOCs and sub-mm POM. The total measured organic carbon mass decreased by about 40% over the course of two days. The increase in sub-mm POM could not be explained by the removal of aromatic precursors alone, suggesting that other species must have contributed and/or that the mechanism for POM formation is more efficient than previously assumed.Citation: de Gouw, J. A., et al. (2005), Budget of organic carbon in a polluted atmosphere: Results from the New England Air

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“…[22] Using the observed ratio between toluene and benzene (assumption 4), the photochemical age, Dt, of the sampled air masses is estimated in this work by [Roberts et al, 1984]:…”

Section: Data Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Budget of organic carbon in a polluted atmosphere: Results from the New England Air Quality Study in 2002

et al. 2005

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“…Compared to the sulfur aging metric, the NO x aging metric is more likely to 302 reflect local processes. Kleinman et al (2007Kleinman et al ( , 2008 Photochemical age, Δt, with respect to hydrocarbons (toluene and benzene) is estimated as 312 (Roberts et al, 1984). 313…”

Section: In Southwestern 290mentioning

confidence: 99%

Airmass aging metrics derived from particle and other measurements near Fort Worth

Cevik

Rutter

Gong

et al. 2016

Atmospheric Environment

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“…These measurements provide useful information about the spatial and temporal variations of these compounds, and the ratios of benzene/toluene (B/T) and ethylbenzene/m,p-xylene (E/X) are recognized as useful indicators of atmospheric photochemical activity as well as the sources origination etc. (Nelson and Quigley, 1983;Roberts et al, 1984;Nutmagul and Cronn, 1985).…”

mentioning

confidence: 99%

Atmospheric levels of BTEX compounds during the 2008 Olympic Games in the urban area of Beijing

Liu

Zhang

et al. 2009

Science of The Total Environment

113

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Measurements of aromatic hydrocarbon ratios and NOx concentrations in the rural troposphere: Observation of air mass photochemical aging and NOx removal

Cited by 230 publications

References 56 publications

Budget of organic carbon in a polluted atmosphere: Results from the New England Air Quality Study in 2002

Budget of organic carbon in a polluted atmosphere: Results from the New England Air Quality Study in 2002

Airmass aging metrics derived from particle and other measurements near Fort Worth

Atmospheric levels of BTEX compounds during the 2008 Olympic Games in the urban area of Beijing

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