Atmospheric Aerosols: Composition, Transformation, Climate and Health Effects

Poeschl, U.

doi:10.1002/chin.200607299

Cited by 392 publications

(538 citation statements)

References 1 publication

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“…Particulate matter (PM), especially fine particles, is of interest because of its effects on human health and climate change (Poschl, 2005). The smaller the particles, with higher number concentration and surface area per unit mass, the more easily absorbed are the toxic air pollutants (Sioutas et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

New particle formation in the presence of a strong biomass burning episode at a downwind rural site in PRD, China

Wang¹,

Hu²,

Yue³

et al. 2013

Tellus B: Chemical and Physical Meteorology

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In order to characterise the features of particle pollution in the Pearl River Delta (PRD) region, a 1-month intensive campaign was conducted at the rural supersite (Kaiping) in the autumn of 2008. In total, 12 new particle formation (NPF) events are identified out of 30 campaign days. The results show that in the case of higher source and sink values, the result of the competition between source and sink is more likely the key limiting factor to determine the observation of NPF events at Kaiping. One episode with consecutive NPF events in the presence of strong biomass burning plume was observed between 10 and 15 November. The elevation of particle volume concentration (6.1 µm3/cm3/day) is due to the coaction by the local biomass burning and secondary transformation. Organics and sulphates are the major components in PM1, accounting for 42 and 35% of the mass concentration, respectively. In this study, a rough estimation is applied to quantify the contributions of diverse sources to the particle number concentration. On average, the primary emission and secondary formation provide 28 and 72% of particle number concentration and 21 and 79% of mass concentration, respectively

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Section: Introductionmentioning

confidence: 99%

New particle formation in the presence of a strong biomass burning episode at a downwind rural site in PRD, China

Wang¹,

Hu²,

Yue³

et al. 2013

Tellus B: Chemical and Physical Meteorology

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“…Moreover, because airborne microorganisms can act as cloud condensation nuclei, these organisms may play an important role in global climate change 2, 3, 7–10 . Previous studies have reported the diversity of airborne microorganisms at certain locations.…”

Section: Introductionmentioning

confidence: 99%

Airborne Bacterial Communities in Three East Asian Cities of China, South Korea, and Japan

Lee

Park

Lee

et al. 2017

Sci Rep

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The global diversity of airborne bacteria has not yet been studied, despite its importance in human health and climate change. Here, we focused on the diversity of airborne bacteria and their correlations with meteorological/environmental conditions in China, South Korea, and Japan. Beijing (China) had more diverse airborne bacteria, followed by Seoul (South Korea) and Nagasaki (Japan), and seasonal variations were observed. Beijing and Seoul had more diverse airborne bacteria during the winter, whereas Nagasaki showed greater diversity during the summer. According to principal component analysis and Bray-Curtis similarity, higher similarity was observed between Beijing and Seoul than between Seoul and Nagasaki during all seasons except summer. Among meteorological/environmental variables, temperature and humidity were highly correlated with the diversity of airborne bacteria on the measurement day, whereas wind speeds and the frequency of northwest winds were highly correlated for 2–3-day moving averages. Thus, proximity and resuspension could enhance bacterial diversity in East Asian cities.

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“…Atmospheric aerosols, defined as an assembly of solid or liquid particles suspended in a gas (Finlayson-Pitts and Pitts, 2000), have a large impact on human health (Dockery and Pope, 2006) and global climate (Poeschl, 2005). Ambient aerosols typically span a size range from 3 nm to 10 µm in diameter.…”

Section: Introductionmentioning

confidence: 99%

The performance and the characterization of laser ablation aerosol particle time-of-flight mass spectrometry (LAAP-ToF-MS)

et al. 2016

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Abstract. Hyphenated laser ablation-mass spectrometry instruments have been recognized as useful analytical tools for the detection and chemical characterization of aerosol particles. Here we describe the performances of a laser ablation aerosol particle time-of-flight mass spectrometer (LAAPToF-MS) which was designed for aerodynamic particle sizing using two 405 nm scattering lasers and characterization of the chemical composition of single aerosol particle via ablation/ionization by a 193 nm excimer laser and detection in a bipolar time-of-flight mass spectrometer with a mass resolving power of m/ m > 600.We describe a laboratory based optimization strategy for the development of an analytical methodology for characterization of atmospheric particles using the LAAP-ToF-MS instrument in combination with a particle generator, a differential mobility analyzer and an optical particle counter. We investigated the influence of particle number concentration, particle size and particle composition on the detection efficiency. The detection efficiency is a product of the scattering efficiency of the laser diodes and the ionization efficiency or hit rate of the excimer laser. The scattering efficiency was found to vary between 0.6 and 1.9 % with an average of 1.1 %; the relative standard deviation (RSD) was 17.0 %. The hit rate exhibited good repeatability with an average value of 63 % and an RSD of 18 %. In addition to laboratory tests, the LAAP-ToF-MS was used to sample ambient air during a period of 6 days at the campus of Aix-Marseille University, situated in the city center of Marseille, France. The optimized LAAP-ToF-MS methodology enables high temporal resolution measurements of the chemical composition of ambient particles, provides new insights into environmental science, and a new investigative tool for atmospheric chemistry and physics, aerosol science and health impact studies.

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Atmospheric Aerosols: Composition, Transformation, Climate and Health Effects

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Cited by 392 publications

References 1 publication

New particle formation in the presence of a strong biomass burning episode at a downwind rural site in PRD, China

New particle formation in the presence of a strong biomass burning episode at a downwind rural site in PRD, China

Airborne Bacterial Communities in Three East Asian Cities of China, South Korea, and Japan

The performance and the characterization of laser ablation aerosol particle time-of-flight mass spectrometry (LAAP-ToF-MS)

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