Estimates of the contributions of sources to inhalable particulate concentrations in detroit

Wolff, George T.; Korsog, Patricia E.

doi:10.1016/0004-6981(85)90277-x

Cited by 35 publications

(22 citation statements)

References 27 publications

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“…This strongly suggests that some of the OC is formed via photochemically-initiated reactions. This is consistent with results from Detroit, 35 -36 measurements taken in neighboring New Jersey which showed increased concentrations of polar OC compounds during episode periods, 25 and the presence of water soluble OC compounds. 30 Fairly good correlations between OC, Pb and EC indicate that primary OC particles from motor vehicles also contribute to the observed levels of OC.…”

Section: Sources Of Hazesupporting

confidence: 91%

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Measurements of Sulfur Oxides, Nitrogen Oxides, Haze and Fine Particles at a Rural Site on the Atlantic Coast

Wolff

Kelly

Ferman

et al. 1986

Journal of the Air Pollution Control Association

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Section: Sources Of Hazesupporting

confidence: 91%

“…For S0 4 f = , the best correlations are with Al f , MW(t), OCf, Sef, 0 3 (max), HNO3, and T. Sef is a tracer of coal combustion. 34 In a previous study in the Midwest, 35 Alf was also implicated as a tracer of coal combustion. The high correlation between Alf and Sef suggests that this is the case in Delaware also.…”

Section: Sources Of Hazementioning

confidence: 94%

Measurements of Sulfur Oxides, Nitrogen Oxides, Haze and Fine Particles at a Rural Site on the Atlantic Coast

Wolff

Kelly

Ferman

et al. 1986

Journal of the Air Pollution Control Association

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“…It has been successfully used for a series of dicarboxylic acids and other atmospheric trace species (Fu et al, 2008;Kawamura and Sakaguchi, 1999b;Wolff and Korsog, 1985). The data sets of diacids and related compounds for daytime (n = 38) and nighttime (n = 20) aerosol samples from Mangshan were subjected to PCA analysis based on their correlation matrix, followed by the varimax rotation of the eigenvectors (Table 3).…”

Section: α-Dicarbonylsmentioning

confidence: 99%

Diurnal and temporal variations of water-soluble dicarboxylic acids and related compounds in aerosols from the northern vicinity of Beijing: Implication for photochemical aging during atmospheric transport

He¹,

Kawamura²,

Okuzawa³

et al. 2014

Science of The Total Environment

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Abstract:Aerosol samples were collected in autumn 2007 on day-and nighttime basis in the northern receptor site of Beijing, China. The samples were analyzed for total carbon (TC) and water-soluble dicarboxylic acids (C 2 -C 12 ), oxocarboxylic acids (C 2 -C 9 ), glyoxal and methylglyoxal to better understand the photochemical aging of organic aerosols in the vicinity of Beijing. Concentrations of TC are 50% greater in daytime when winds come from Beijing than in nighttime when winds come from the northern forest areas. Most diacids showed higher concentrations in daytime, suggesting that the organics emitted from the urban Beijing and delivered to the northern vicinity in daytime are subjected to photo-oxidation to result in diacids.However, oxalic acid (C 2 ), which is the most abundant diacid followed by C 3 or C 4 , became on average 30% more abundant in nighttime together with azelaic, ω-oxooctanoic and ω-oxononanoic acids, which are specific oxidation products of biogenic unsaturated fatty acids.Methylglyoxal, an oxidation product of isoprene and a precursor of oxalic acid, also became 29% more abundant in nighttime. Based on a positive correlation between C 2 and glyoxylic acid (ωC 2 ) in nighttime when relative humidity significantly enhanced, we propose a nighttime aqueous phase production of C 2 via the oxidation of ωC 2 . We found an increase in the contribution of diacids to TC by 3 folds during consecutive clear days. This study demonstrates that diacids and related compounds are largely produced in the northern vicinity of Beijing via photochemical processing of organic precursors emitted from urban center and forest areas.

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“…Since the Rio site is heavily impacted by motor vehicle traffic, this is not surprising. Wolff and Korsog 21 have pointed out that the percentage of heavy duty diesel vehicles can strongly affect the OC/EC ratio observed in a city. Approximately 8-10 percent of the vehicles passing through the Rio intersection were diesel buses.…”

mentioning

confidence: 99%

“…We have assumed that the OC and EC emission rates reported by Wolff and Korsog 21 for heavy duty diesels and heavy duty gasoline trucks apply to the diesel buses and gasoholpowered trucks in Rio. Since gasohol is 80 percent gasoline and the cars in Rio are not catalyst-equipped, we have used emission rates for pre-catalyst cars in the U.S., 38 as suggested by R. Williams (General Motors Research Laboratories, personal communication).…”

mentioning

confidence: 99%

An Overview of the Rio de Janeiro Aerosol Characterization Study

Daisey

Miguel

Andrade

et al. 1987

JAPCA

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Estimates of the contributions of sources to inhalable particulate concentrations in detroit

Cited by 35 publications

References 27 publications

Measurements of Sulfur Oxides, Nitrogen Oxides, Haze and Fine Particles at a Rural Site on the Atlantic Coast

Measurements of Sulfur Oxides, Nitrogen Oxides, Haze and Fine Particles at a Rural Site on the Atlantic Coast

Diurnal and temporal variations of water-soluble dicarboxylic acids and related compounds in aerosols from the northern vicinity of Beijing: Implication for photochemical aging during atmospheric transport

An Overview of the Rio de Janeiro Aerosol Characterization Study

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