The Mass Distribution of Large Atmospheric Particles

Lundgren, Dale A.; Paulus, Harold J.

doi:10.1080/00022470.1975.10470200

Cited by 44 publications

(31 citation statements)

References 2 publications

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“…Diurnal variations of particle size distribution of the 13 PAHs concentrations are shown in Figure 8 with classification of semi-volatile 3-4 ring PAHs and non-volatile 5-6 ring PAHs, respectively. Each graph of the size distribution is shown as Lungren type plots [27]. An overall trend of the size distribution was consistent with that in previous studies that concentrations of PAHs were found to be highly dependent upon the size of particulate matter, with the greatest concentrations being the submicron size range (e.g., [7,[28][29][30]).…”

Section: Resultssupporting

confidence: 69%

Temporal Variation of Particle Size Distribution of Polycyclic Aromatic Hydrocarbons at Different Roadside Air Environments in Bangkok, Thailand

Hoshiko¹,

Yamamoto²,

Nakajima³

et al. 2012

Atmospheric Aerosols - Regional Characteristics - Chemistry and Physics

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, Thailand 31 cool (November -February). In terms of their characteristics, the hot season is hot and dry, the wet season is hot and wet, and the cool season is cool and dry. Field measurements were conducted in March and April, 2006, in the hot season. Concentrations of particulate phase P A H s w e r e m e a s u r e d o n t h e r o a d s i d e i n B a n g k o k . D i u r n a l v a r i a t i o n s o f P A H concentrations were investigated by comparing two roadside sites with different road configurations. The measurement sites were Rama6 (R6) and Chockchai4 (CC). The R6 site is located in the area of government offices in the Bangkok city center, where one of the main roads, R6, carries heavy traffic. The R6 road is covered by an elevated highway (Figure 1a), and this configuration, together with large roadside buildings, is likely to cause a stagnant air mass within the road space. By contrast, the CC site has an ordinary open-space configuration along the Ladphrao road, with low-rise small buildings (Figure 1b). The measurement points were approximately three meters distance from the roads at both sites, 1.5 meters height from the ground at R6 (Figure 2a) and three meters height at CC in a Pollution Control Department's (PCD) air monitoring station, where the rooftop space of the station was provided to install measurement equipment for this study (Figure 2b).

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Section: Resultssupporting

confidence: 69%

Temporal Variation of Particle Size Distribution of Polycyclic Aromatic Hydrocarbons at Different Roadside Air Environments in Bangkok, Thailand

Hoshiko¹,

Yamamoto²,

Nakajima³

et al. 2012

Atmospheric Aerosols - Regional Characteristics - Chemistry and Physics

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“…Lundgren and Paulus (27) have also stated that the ASDs are bimodal. Most of the distributions measured in this study have either one or two peaks.…”

Section: Figure 3 Atmospheric Size Distributions Of Lead Measured Wimentioning

confidence: 99%

Dry Deposition Fluxes and Mass Size Distributions of Pb, Cu, and Zn Measured in Southern Lake Michigan during AEOLOS

Paode

Sofuoğlu

Sivadechathep

et al. 1998

Environ. Sci. Technol.

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As part of the Atmospheric Exchange Over Lakes and Oceans Study (AEOLOS) the dry deposition fluxes and atmospheric size distributions (ASDs) of anthropogenic metals were measured over the southern basin of Lake Michigan. The measurements were made during winter, summer, and fall, concurrently, in Chicago, IL; over Lake Michigan onboard the U.S. EPA RV Lake Guardian; and in South Haven, MI. The flux of Pb, Cu, and Zn was substantially higher in Chicago than in either South Haven or over Lake Michigan. The average measured Pb, Cu, and Zn fluxes were 0.07, 0.06, and 0.20 mg m -2 day -1 in Chicago; 0.003, 0.01, and 0.01 mg m -2 day -1 over Lake Michigan; and 0.004, 0.007, and 0.004 mg m -2 day -1 in South Haven. When the wind was from Chicago over the lake, the fluxes and concentrations measured over the lake were higher than when the wind was from other directions. In general, these anthropogenic metals had higher concentrations in the fine particle mode than in the coarse particle mode. Modeled and measured fluxes were in reasonable agreement. Coarse particles were found to be responsible for the majority of the flux at all locations.

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“…Therefore, a confirmation of the bimodality of the volume concentration distribution as measured by the MAAS was not possible. Using mass measurement devices, Lundgren 13 recently did verify that atmospheric aerosols usually have a bimodal mass distribution. In his experiments he used a special set of single-stage impactors in parallel with a Lundgren cascade impactor.…”

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confidence: 99%

Atmospheric Aerosols: Size Distribution Interpretation

Willeke

Whitby

1975

Journal of the Air Pollution Control Association

202

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The body of information presented in this paper is directed towards the scientist or engineer who measures and interprets the physical characteristics of ambient air. This paper interprets measurements made with the Minnesota Aerosol Analyzing System (MAAS) in Denver, near Denver, and near Ft. Collins, Colo., and examines the measurements in the light of what has been learned from several thousand size distributions measured in the other parts of the United States. The origin and physical change of atmospheric particulates is examined through interpretation of modes occurring in the size distributions. The mode coined "AHken Nuclei Range" mode is a measure of aerosol generation, while aged aerosols show up in the "Accumulation Range" mode. Windblown dusts, sea sprays, and mechanically produced particles such as fly ash generate a "Coarse Particle Range" mode. The air environment is categorized into several types of background and urban aerosols whose physical characteristics are described by a limited number of parameters. These categories are exemplified and discussed.During the past few years several thousand in-situ aerosol particle size distributions were measured by the Minnesota Aerosol Analyzing System (MAAS) in a variety of urban and non-urban surface locations throughout the United States. We have shown that the size distribution of airborne particles is almost always multimodal in nature. In addition, we have now classified ambient air environments into several categories. In this paper we shall examine some of the data obtained in the Denver area with respect to these ambient air environment classifications.Much of our understanding of the physical characteristics of airborne particles, such as size distribution and concentration, has come through extended use of the Minnesota Aerosol Analyzing System. The MAAS, described in detail by Whitby et al. ,* measures the number concentration of particles over about four size decades. The three principal instruments in the system are an electrical aerosol analyzer for recording the smaller particle size spectrum, an optical single particle counter for recording the larger size spectrums, and a condensation nuclei counter for the total nuclei count. May 1975Volume 25, No. 5 529 as in Figure 1, which shows the grand average for 236 runs at Denver's City Maintenance Yard from Oct. [26][27][28][29][30] 1971. Usually number has been plotted since it is the most common weighting measured. Junge observed-and it has been confirmed 3 -that the size distribution between about 0.1 and 5 iim when plotted as in Figure 1 may often be fitted approximately by a power function of the form A/V/Alog D p = KD p~k where K and k are constants. Generally k is between 2 and 4. Clark and Whitby 3 found that Minneapolis urban aerosol could be fitted reasonably well with K = 0.4 VT and k = 3, where VT is the total aerosol volume.However, from Figure 1 it is seen that the number distribution, while showing some intriguing bumps, does not show much detail because of the steep slope for ...

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The Mass Distribution of Large Atmospheric Particles

Cited by 44 publications

References 2 publications

Temporal Variation of Particle Size Distribution of Polycyclic Aromatic Hydrocarbons at Different Roadside Air Environments in Bangkok, Thailand

Temporal Variation of Particle Size Distribution of Polycyclic Aromatic Hydrocarbons at Different Roadside Air Environments in Bangkok, Thailand

Dry Deposition Fluxes and Mass Size Distributions of Pb, Cu, and Zn Measured in Southern Lake Michigan during AEOLOS

Atmospheric Aerosols: Size Distribution Interpretation

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