Characteristics of Individual Particles at a Rural Site in the Eastern United States

Mamane, Y.; Dzubay, Thomas G.

doi:10.1080/00022470.1986.10466129

Cited by 10 publications

(9 citation statements)

References 13 publications

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“…The lack of a reasonable natural source for such particles suggests that they result from gaseous sulfur species condensing or reacting on the surfaces of small crustal particles. Such sulfur incorporation was reported for fly ash particles by Mamane and Dzubay [1986]. The submicrometer diameter of the majority of these partic]es suggests that they have been transported a considerable distance.…”

Section: Resultssupporting

confidence: 63%

Aerosol particle characteristics determined by combined cluster and principal component analysis

Saucy¹,

Anderson²,

Buseck³

1991

J. Geophys. Res.

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Cluster and principal component analysis procedures were used to examine compositions and time-dependent concentrations of aerosol particles collected over a 7-day period near Phoenix, Arizona. The elemental compositions of 13,026 individual particles have been determined by energy dispersive X ray spectrometry using a scanning electron microscope. Cluster analysis of the individual-particle data revealed 15 chemically distinct particle types. Principal component analysis of the time-dependent concentrations of these types indicated five unique concentration versus time patterns. Based on the chemical compositions and size characteristics, as well as on wind patterns during collection, distinct sources for the majority of the particle types can be ascribed. The three major sources are crustal material, copper smelters, and marine air. Two minor types, Ti. rich and Pb.rich, appear to be of local origin. This combination of the time-dependent chemistry and size and wind data leads to improved source attribution. matter in rain runoff from limestone buildings [Leysen et al., 1987].

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Section: Resultssupporting

confidence: 63%

Aerosol particle characteristics determined by combined cluster and principal component analysis

Saucy¹,

Anderson²,

Buseck³

1991

J. Geophys. Res.

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“…In addition to the data presented in Table 2, speciated ambient pollen and mold spore counts (number/ m 3 ) were determined at the Steubenville monitoring site because these aeroallergens may be important contributors to respiratory health effects. Pollen and spores have been identified as components of coarse PM, 31,32 and evidence of microspores and pollen-and sporederived cytoplasmic material has been found in fine PM. 32 Nevertheless, the contribution of pollen and mold spores to PM mass could not be quantified in this study because of the absence of size-fractionated pollen and mold spore mass data.…”

Section: Resultsmentioning

confidence: 99%

The Steubenville Comprehensive Air Monitoring Program (SCAMP): Associations among Fine Particulate Matter, Co-Pollutants, and Meteorological Conditions

Connell

Withum

Winter

et al. 2005

Journal of the Air & Waste Management Association

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We determined 24-hr average ambient concentrations of PM 2.5 and its ionic and carbonaceous components in concentration in a time-series model with external regressors, which successfully accounted for 79% of the variance in log-transformed daily PM 2.5 concentrations. Coefficient estimates for NO x and temperature varied significantly by season. The results provide insight that may be useful in the development of future PM 2.5 reduction strategies for Steubenville. Additionally, they demonstrate the need for PM epidemiology studies in Steubenville (and elsewhere) to carefully consider the potential confounding effects of gaseous co-pollutants, such as CO and NO x , and their seasonally dependent associations with PM 2.5 .

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“…Since the Pb-Br correlation coefficient was 0.80, a predominantly motor vehicle origin is still likely, but the low Br/Pb ratio found at DCL is indicative of an acidic aerosol, which can displace bromine. In fact electron microscopic measurements (Mamane and Dzubay, 1986) on DCL aerosol samples showed a large contribution from acidic sulfates. In addition high aerosol acidities were frequently measured concurrently at the two sites operated by Ford Research Laboratory (Pierson et al, 1989).…”

Section: Diurnal Averagesmentioning

confidence: 94%

Composition and origin of summertime air pollutants at Deep Creek Lake, Maryland

Vossler

Lewis

Stevens

et al. 1989

Atmospheric Environment (1967)

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Abstrset-A 1 month intensive summe~me field study conducted in rural western Maryland resulted in a ~mprehensive set of fine particle, gaseous and met~rolo~~l data. Sulfur in the assumed form of Arnold sulfate accounted for 67% of the average tine particle mass and had a very high correlation with fine particIe mass (r=O.99). Other measured species, including carbon and nitrate, made only minor contributions to the fine mass. Peak sulfate concentrations, averaged over 6-h intervals, exceeded 50 pg mm3. Nitric acid concentrations showed strong daytime maxima and on a 24 h basis were about four times those of fine particle nitrate. Sulfur in the gas phase (SO,) constituted more than half of the total sulfur, indicating that the sampling site was being influenced by local sources. Fine particle selenium was well corretated with fine partide sulfur (r=O.70}. The ratio of fine particle suifur to selenium was 2800, characteristic of a rural site downwind of coal-burning areas. Mixed-layer back trajectories were used to id~t~y possible source regions for the measured parameters. Wind f~quency-noes con~nt~tio~ of parameters associated with coal-burning (S, Se, SO, and mass) were highest for back trajectories arriving at Reep Creek Lake from the west-northwest. Use of Rahn and Lowenthal regional signatures showed an overwhelming dominance by the Lower Midwest region, and a surprisingly weak impact by the Upper Midwest region, at the site.

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Characteristics of Individual Particles at a Rural Site in the Eastern United States

Cited by 10 publications

References 13 publications

Aerosol particle characteristics determined by combined cluster and principal component analysis

Aerosol particle characteristics determined by combined cluster and principal component analysis

The Steubenville Comprehensive Air Monitoring Program (SCAMP): Associations among Fine Particulate Matter, Co-Pollutants, and Meteorological Conditions

Composition and origin of summertime air pollutants at Deep Creek Lake, Maryland

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