Critical assessment of the current state of scientific knowledge, terminology, and research needs concerning the role of organic aerosols in the atmosphere, climate, and global change

Fuzzi, S.; Andreae, Meinrat O.; Huebert, B. J.; Kulmala, Markku; Bond, Tami C.; Boy, Michael; Doherty, Sarah J.; Guenther, Alex; Kanakidou, Maria; Kawamura, Kimitaka; Kerminen, V.-M.; Lohmann, Ulrike; Russell, Lynn M.; Pöschl, Ulrich

doi:10.5194/acp-6-2017-2006

Cited by 494 publications

(396 citation statements)

References 84 publications

(55 reference statements)

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“…HULIS exhibits strong surface activity that can influence the properties of the gaseliquid interface of droplets, and the multiphase or liquid phase water chemistry (Kiss et al, 2005;Dinar et al, 2006). Consequently, HULIS can influence the surface tension and growth of nucleating cloud droplets, and thereby would have important impacts on the cloud microphysical properties, the indirect climatic forcing of atmospheric aerosol (Kiss et al, 2005;Dinar et al, 2006;Fuzzi et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Comparison of isolation and quantification methods to measure humic-like substances (HULIS) in atmospheric particles

Fan

Song

Peng

2012

Atmospheric Environment

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Section: Introductionmentioning

confidence: 99%

Comparison of isolation and quantification methods to measure humic-like substances (HULIS) in atmospheric particles

Fan

Song

Peng

2012

Atmospheric Environment

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“…However, these processes are still regarded as highly uncertain contributors to atmospheric OA chemistry (Fuzzi et al, 2006;Hallquist et al, 2009). Aqueous-phase chemistry may enhance O:C or OA mass significantly if it can produce low volatility compounds with high oxygen content.…”

Section: Introductionmentioning

confidence: 99%

Functionalization and fragmentation during ambient organic aerosol aging: application of the 2-D volatility basis set to field studies

et al. 2012

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Abstract. Multigenerational oxidation chemistry of atmospheric organic compounds and its effects on aerosol loadings and chemical composition is investigated by implementing the Two-Dimensional Volatility Basis Set (2-D-VBS) in a Lagrangian host chemical transport model. Three model formulations were chosen to explore the complex interactions between functionalization and fragmentation processes during gas-phase oxidation of organic compounds by the hydroxyl radical. The base case model employs a conservative transformation by assuming a reduction of one order of magnitude in effective saturation concentration and an increase of oxygen content by one or two oxygen atoms per oxidation generation. A second scheme simulates functionalization in more detail using group contribution theory to estimate the effects of oxygen addition to the carbon backbone on the compound volatility. Finally, a fragmentation scheme is added to the detailed functionalization scheme to create a functionalization-fragmentation parameterization. Two condensed-phase chemistry pathways are also implemented as additional sensitivity tests to simulate (1) heterogeneous oxidation via OH uptake to the particle-phase and (2) aqueous-phase chemistry of glyoxal and methylglyoxal.The model is applied to summer and winter periods at three sites where observations of organic aerosol (OA) mass and O:C were obtained during the European Integrated Project on Aerosol Cloud Climate and Air Quality Interactions (EU-CAARI) campaigns. The base case model reproduces observed mass concentrations and O:C well, with fractional errors (FE) lower than 55 % and 25 %, respectively. The detailed functionalization scheme tends to overpredict OA concentrations, especially in the summertime, and also underpredicts O:C by approximately a factor of 2. The detailed functionalization model with fragmentation agrees well with the observations for OA concentration, but still underpredicts O:C. Both heterogeneous oxidation and aqueous-phase processing have small effects on OA levels but heterogeneous oxidation, as implemented here, does enhance O:C by about 0.1. The different schemes result in very different fractional attribution for OA between anthropogenic and biogenic sources.

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“…Moreover, airborne particles play an important role for the spread of biological organisms, reproductive materials, and pathogens (pollen, bacteria, spores, viruses, etc. ), and they can cause or enhance respiratory, cardiovascular, infectious, and allergic diseases (Seinfeld and Pandis 1998;Finlayson-Pitts and Pitts 1999;Bernstein et al 2004;Kanakidou et al 2005;Oberdorster et al 2005;Lohmann and Feichter 2005;Pöschl 2005;Fuzzi et al 2006;McFiggans et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Raman Microspectroscopic Analysis of Size-Resolved Atmospheric Aerosol Particle Samples Collected with an ELPI: Soot, Humic-Like Substances, and Inorganic Compounds

Ivleva

McKeon

Nießner

et al. 2007

Aerosol Science and Technology

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151

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Raman microspectroscopy and mapping have been applied for the analysis of soot, humic-like substances (HULIS) and inorganic compounds in size resolved samples of air particulate matter collected with an electrical low pressure impactor (ELPI). Using several reference materials, we found that spectral parameters determined by curve fitting with five bands (G, D1-D4) enable a discrimination of soot and HULIS and provide information about the relative abundance and structural order of graphite-like carbon. In particular, the D1 band width exhibited a near-linear negative correlation with the ratio of apparent elemental carbon to total carbon in different types of soot.The ELPI samples of sub-micrometer atmospheric particles exhibited essentially the same Raman spectra and parameters as standard diesel soot. In winter samples this was also the case for larger particles with aerodynamic diameters up to 4 μm. Spring and autumn samples, however, exhibited increased D1 band widths and D3 band intensities, indicating a high prevalence of HULIS in the size range of 2-4 μm. In addition, various nitrates and sulfates (mostly NaNO 3 and (NH 4 ) 2 SO 4 ; some NH 4 NO 3 , Ca(NO 3 ) 2 , Na 2 SO 4 , and CaSO 4 ) and small amounts of CaCO 3 were detected. Different single-and multi-component spectra indicated the presence of externally and internally mixed particles. The relative abundance of different chemical components in different particle size ranges was quantified in mapping experiments (0-55% NaNO 3 , 1-15% (NH 4 ) 2 SO 4 , 10-45% soot/HULIS, 30-60% highly fluorescent organics). Overall, the results of this study demonstrate that Raman microspectroscopy and mapping can provide qualitative and quantitative information about the composition of ELPI aerosol samples.

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Critical assessment of the current state of scientific knowledge, terminology, and research needs concerning the role of organic aerosols in the atmosphere, climate, and global change

Cited by 494 publications

References 84 publications

Comparison of isolation and quantification methods to measure humic-like substances (HULIS) in atmospheric particles

Comparison of isolation and quantification methods to measure humic-like substances (HULIS) in atmospheric particles

Functionalization and fragmentation during ambient organic aerosol aging: application of the 2-D volatility basis set to field studies

Raman Microspectroscopic Analysis of Size-Resolved Atmospheric Aerosol Particle Samples Collected with an ELPI: Soot, Humic-Like Substances, and Inorganic Compounds

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