Modal character of atmospheric black carbon size distributions

Berner, A.; Sidla, S.; Galambos, Z.; Kruisz, C.; Hitzenberger, R.; Brink, H.M. ten; Kos, G.P.A.

doi:10.1029/95jd03425

Cited by 95 publications

(34 citation statements)

References 13 publications

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“…There are also reports of observations of an accumulation mode EC of 0.40-0.65 µm in MMAD in urban atmospheres elsewhere (e.g., Miguel and Friedlander 1984;Hitzenberger and Puxbaum 1993;Berner et al 1996;Hitzenberger and Tohno 2001;Cabada et al 2004;Hitzenberger et al 2006). This larger EC mode was typically explained to be aged EC particles internally mixed with other aerosol substanaces (e.g., sulfate and organic matter).…”

Section: Ec Size Distributionsmentioning

confidence: 99%

Modal Characteristics of Elemental and Organic Carbon in an Urban Location in Guangzhou, China

2009

Aerosol Science and Technology

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Carbonaceous matter is a major constituent in urban aerosols, especially in those collected in China. The size distributions of elemental carbon (EC) and organic carbon (OC) in the range of 0.01-18 µm were measured in an urban location in Guangzhou, China in July 2006. The EC size distribution in the accumulationmode size was characterized by three significant modes with mass median aerodynamic diameters (MMAD) of ∼0.15 µm, ∼0.40 µm, and ∼0.90 µm, with the second one being the most prominent and accounting for approximately half of the total EC mass. The coexistence of the first two accumulation modes in Guangzhou's urban atmosphere could be explained to be a result of emissions from vehicles operating at different loadings. The dominance of the EC accumulation mode at ∼0.40 µm has not often been reported in studies conducted in developed countries, but this observation is consistent with EC size distributions measured in a roadway tunnel in this region. This information is important when modeling the role of EC in modulating the radiative balance and investigating the health effects of EC. The third accumulation mode was postulated to be a result of in-cloud processing after emission. OC had the same size modes as EC but different mass distributions among the modes. The carbonaceous materials in the nucleation mode were dominated by OC. Among particles in the accumulation size range, the OC/EC ratio was higher in the third accumulation mode (MMAD: 0.90 µm) than in the first two accumulation modes, suggesting that in-cloud processing was an important pathway for accumulating OC mass during atmospheric processing of EC particles.

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Section: Ec Size Distributionsmentioning

confidence: 99%

Modal Characteristics of Elemental and Organic Carbon in an Urban Location in Guangzhou, China

2009

Aerosol Science and Technology

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“…During several pollution events the Central European ground stations showed a stronger increase of the BC-mass concentrations than the accumulation mode number concentrations. Different sources, source strengths and transport processes can contribute to different fractions of BC particles in different aerosol size ranges (e.g., Berner et al, 1996;Hitzenberger and Tohno, 2001;Rose et al, 2006). Thus the relative variations of the accumulation mode particle concentrations and the BC-mass concentrations can differ in magnitude, although both were affected by similar anthropogenic sources.…”

Section: Comparison Of Accumulation Mode Time Series With Bc Time Seriesmentioning

confidence: 99%

Overview of the synoptic and pollution situation over Europe during the EUCAARI-LONGREX field campaign

et al. 2011

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Abstract. In May 2008 the EUCAARI-LONGREX aircraft field campaign was conducted within the EUCAARI intensive observational period. The campaign aimed at studying the distribution and evolution of air mass properties on a continental scale. Airborne aerosol and trace gas measurements were performed aboard the German DLR Falcon 20 and the British FAAM BAe-146 aircraft. This paper outlines the meteorological situation over Europe during May 2008 and the temporal and spatial evolution of predominantly anthropogenic particulate pollution inside the boundary layer and the free troposphere.

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“…The mechanisms for the cardiovascular effects are not completely understood, but a possible hypothesis is that, because of their small size, UFPs could enter the systemic circulation and induce direct effects on myocardium or coronary vasculature (Nemmar et al, 2004). Several studies have indicated that about 50-70% of UFP mass consists of carbonaceous material (Puxbaum and Wopenka, 1984;Berner et al, 1996;Hughes et al, 1998;Chen et al, 2010;Zhu et al, 2010b). Combustion-derived ultrafine particles, such as diesel soot, are the most numerous particles, by number, in urban PM 10 .…”

Section: Introductionmentioning

confidence: 99%

Deep Investigation of Ultrafine Particles in Urban Air

Avino

Casciardi

Fanizza

et al. 2011

Aerosol Air Qual. Res.

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This work describes the results of a study which started in 2007 to investigate the ultrafine particle (UFP) pollution in the urban area of Rome. The sampling site was located in a street with high density of autovehicular traffic, where measurements have shown that carbonaceous particulate matter represented an important fraction of aerosol pollution. UFPs have been classified by means of an electrostatic classifier. Monodisperse aerosol was either counted by ultrafine water-based condensation particle counter or sampled by means of a nanometer aerosol sampler. Samples collected were investigated using energy filtered transmission electron microscope in combination with energy dispersive X-ray spectroscopy and electron energy loss spectroscopy. Electron transmission microscope observations revealed that carbonaceous UFPs were present also as nanotube related forms.The rapid evolution of aerosol from autovehicular exhaust plumes was observed by highly time-resolved aerosol size distribution measurements.

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Modal character of atmospheric black carbon size distributions

Cited by 95 publications

References 13 publications

Modal Characteristics of Elemental and Organic Carbon in an Urban Location in Guangzhou, China

Modal Characteristics of Elemental and Organic Carbon in an Urban Location in Guangzhou, China

Overview of the synoptic and pollution situation over Europe during the EUCAARI-LONGREX field campaign

Deep Investigation of Ultrafine Particles in Urban Air

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