Detailed mass size distributions of elements and species, and aerosol chemical mass closure during fall 1999 at Gent, Belgium

Maenhaut, Willy; Cafmeyer, Jan; Dubtsov, S.N.; Chi, Xuguang

doi:10.1016/s0168-583x(01)01049-7

Cited by 27 publications

(21 citation statements)

References 10 publications

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“…EC size distribution measurements made in developed countries typically describe a dominant condensation mode at this size (Miguel et al, 2004;Venkataraman et al, 1994;Maenhaut et al, 2002). We calculated the MAE and MSE of such EC particles at 0.15 µm (particle (a) in Fig.…”

Section: Light Extinction Of Ec-containing Particles In Different Sizmentioning

confidence: 99%

Size distributions of elemental carbon and its contribution to light extinction in urban and rural locations in the pearl river delta region, China

et al. 2010

Atmos. Chem. Phys.

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Abstract. Elemental carbon (EC) in size-segregated aerosol samples were determined at five urban, one suburban, and one rural locations in the Pearl River Delta region in South China during 2006-2008 period. The size modal characteristics of EC were different at the urban and suburban/rural locations. The urban EC had a dominant condensation mode with a mass median aerodynamic diameter (MMAD) in the 0.36-0.43 µm range and a slightly less abundant mode in the droplet mode size (MMAD: 0.8-1.1 µm), while the suburban/rural EC had a prominent mode in the droplet mode size (MMAD: 0.7-1.1 µm) and a minor condensation mode (MMAD: 0.22-0.33 µm). Calculations using Mie theory and the measured size distributions of EC, organic carbon, and major inorganic ions indicate that EC-containing particles contributed 76±20% of the observed light extinction at the urban sites. Among the EC-containing particles, EC mass alone contributed 21±11% of the observed light extinction while non-EC materials on the EC particles (i.e., organic matter, ammonium sulfate, and water) contributed 55±15%. At the suburban/rural locations, EC-containing particles contributed 37-48% of the measured light extinction, with EC mass contributing 4-10% and non-EC coating materials contributing the remaining light extinction. Our results suggest that EC-containing particles were important to the overall light extinction in the urban atmospheres due to their more abundant presence from vehicular emissions. The ECcontaining particles in the suburban/rural locations had a reduced but still significant contribution to light extinction budget.

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Section: Light Extinction Of Ec-containing Particles In Different Sizmentioning

confidence: 99%

Size distributions of elemental carbon and its contribution to light extinction in urban and rural locations in the pearl river delta region, China

et al. 2010

Atmos. Chem. Phys.

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“…In urban ambient environments, EC at MMAD less than 0.3 µm was frequently observed. For example, Venkataraman and Friedlander (1994) Maenhaut et al (2002) found that EC was predominantly associated with 0.2 µm fine particles in an urban site in Belgium.…”

Section: Ec Size Distributionsmentioning

confidence: 99%

“…The existing data tend to vary among study locations, depending not only on sources but also on the degree of atmospheric aging (Venkataraman et al 1994;Maenhaut et al 2002;Neusüß et al 2002;Cabada et al 2004;Miguel et al 2004;Jaffrezo et al 2005;Chuaybamroong et al 2007;Chow et al 2008). Size segregated EC and OC data in China are sparse (Zhang et al 2000;Huang and Yu 2008).…”

Section: Introductionmentioning

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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“…A hypothetical aerosol size/composition distribution is shown in Figure 12.1 , indicating that crustal materials (e.g., CO 3 2− , Si, Al, Fe, Ca, and Mn), sea spray (e.g., Mg, Na, and Cl), and biogenic organic particles (e.g., pollen, spores, and plant fragments) are usually found in the coarse aerosol fraction (2.5 < d ae < 10 μ m) (M é sz á ros et al, 1997 ; Kriv á csy and Moln á r, 1998 ; Matsumoto et al, 1998 ;Seinfeld and Pandis, 1998 ;Maenhaut et al, 2002 ;Smol í k et al, 2003 ). Wind erosion, primary emissions, mechanical disruption, sea spray, and volcanic eruptions all contribute to the concentrations of these species (Seinfeld, 1986 ;Seinfeld and Pandis, 1998 ).…”

Section: Major Constituents Of Atmospheric Aerosolsmentioning

confidence: 99%

Natural Organic Matter in Atmospheric Particles

Duarte

2009

Biophysico‐Chemical Processes Involving Natural Nonliving Organic Matter in Environmental Systems

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Detailed mass size distributions of elements and species, and aerosol chemical mass closure during fall 1999 at Gent, Belgium

Cited by 27 publications

References 10 publications

Size distributions of elemental carbon and its contribution to light extinction in urban and rural locations in the pearl river delta region, China

Size distributions of elemental carbon and its contribution to light extinction in urban and rural locations in the pearl river delta region, China

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

Natural Organic Matter in Atmospheric Particles

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