Secondary Organic Aerosols
Stable carbon isotope ratios of ambient secondary organic aerosols in Toronto
... sources using only concentration measurements. Stable car- bon isotope ratio measurements have been useful tools in atmospheric chemistry (Gensch et al., 2014). The ratio of the 13 C isotope, which has a natural ...
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Observation of biogenic secondary organic aerosols in the atmosphere of a mountain site in central China: temperature and relative humidity effects
... Volatile organic compounds (VOCs) produced from the bio- sphere have a substantial impact on the atmospheric chem- ...volatile organic com- pounds (BVOCs, 1150 Tg yr −1 ), mostly consisting of iso- prene, ...
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Formation of secondary organic aerosols from the ozonolysis of dihydrofurans
... of secondary organic aerosols, SOAs (Chan et ...volatility organic compounds that can enhance or even dominate the formation and growth of organic aerosol particles in forested ...
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Aqueous phase processing of secondary organic aerosols
... ization of organic molecules, liquid methanol (0.2 µl min −1 ) was continuously vaporized into the APCI source using an HPLC pump. The nebulizing gas was nitrogen for the positive mode and synthetic air for the ...
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Mass yields of secondary organic aerosols from the oxidation of α-pinene and real plant emissions
... Aerosol yields can be determined from progressive changes in VOC concentration and in aerosol mass concentration dur- ing a single experiment for the compound with one C=C bond (Ng et al., 2006). Figure 2 shows SOA mass ...
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Updated aerosol module and its application to simulate secondary organic aerosols during IMPACT campaign May 2008
... oxygenated organic aerosol (OOA) concentrations abstracted from aerosol mass spectrometer (AMS) measurements at a rural site near Rotterdam, the Netherlands, performed during the IMPACT campaign in May ...
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Hygroscopicity of secondary organic aerosols formed by oxidation of cycloalkenes, monoterpenes, sesquiterpenes, and related compounds
... produced in dark ozonolysis experiments in a dry chamber (RH∼5%). Biogenic SOA from monoterpenes, sesquiter- penes, and oxygenated terpenes is formed by photooxidation in a humid chamber (∼50% RH). Using the ...
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Estimating the influence of the secondary organic aerosols on present climate using ECHAM5-HAM
... upper troposphere, such measurements must be made in-situ and not, for example, by collection on filters and subsequent ground-level analysis. Unfortunately, such mea- surements that can explicitly give organic ...
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A new method to discriminate secondary organic aerosols from different sources using high-resolution aerosol mass spectra
... relatively fresh SV-OOA in the ambient aerosol (Ng et al., 2010). The atomic O:C ratios were found in the range of 0.25–0.55 with no major increase during the first five hours of aging, which is likely due to the fact ...
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Molecular composition of biogenic secondary organic aerosols using ultrahigh-resolution mass spectrometry: comparing laboratory and field studies
... BVOC mixtures and ambient aerosol from boreal forest. Considering that the O / C ratio is positively correlated with hygroscopicity of the organic fraction, the simplified α- pinene-only system can potentially be ...
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A mass spectrometric study of secondary organic aerosols formed from the photooxidation of anthropogenic and biogenic precursors in a reaction chamber
... The aim is to eval- uate how the mass spectral signatures of the photooxidation products of 1,3,5-TMB and α -pinene observed in this study compare to mass spectral signatures of the aero[r] ...
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Future vegetation–climate interactions in Eastern Siberia: an assessment of the competing effects of CO<sub>2</sub> and secondary organic aerosols
... D., Penner, J. E., Pozzoli, L., Pringle, K. J., Russell, L. M., Schulz, M., Sciare, J., Seland, Ø., Shindell, D. T., Sillman, S., Skeie, R. B., Spracklen, D., Stavrakou, T., Steenrod, S. D., Takemura, T., Tiitta, P., ...
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Development of a secondary organic aerosol formation mechanism: comparison with smog chamber experiments and atmospheric measurements
... secondary organic products derived from biogenic emissions are responsible for most of the mass of the secondary organic aerosols. This fact is in agreement with previous modeling ...
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Determination of the biogenic secondary organic aerosol fraction in the boreal forest by NMR spectroscopy
... probable secondary origin, can be considered as the max- imum anthropogenic fraction of ...biogenic secondary organic aerosols in Hyyti¨al¨a through oxidation and condensation phenomena: a ...
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Determination of the biogenic secondary organic aerosol fraction in the boreal forest by AMS and NMR measurements
... biogenic secondary organic aerosols in Hyyti ¨al ¨a through oxidation and condensation phenomena: a first source involving products of marine origin, which is more important during low aerosol ...
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Fungal spores overwhelm biogenic organic aerosols in a midlatitudinal forest
... of organic aerosols (OAs) but a small fraction of to- tal particles (Pöschl et ...volatile organic compounds (BVOCs) are highly reac- tive and thus subjected to photooxidation to form fine parti- ...
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Organic molecular composition of marine aerosols over the Arctic Ocean in summer: contributions of primary emission and secondary aerosol formation
... Abstract. Organic molecular composition of marine aerosol samples collected during the MALINA cruise in the Arctic Ocean was investigated by gas chromatography/mass spec- ...individual organic compounds ...
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Modeling organic aerosol composition at the puy de Dôme mountain (France) for two contrasted air masses with the WRF-Chem model
... men, J., Donahue, N. M., George, C., Goldstein, A. H., Hamilton, J. F., Herrmann, H., Hoff- mann, T., Iinuma, Y., Jang, M., Jenkin, M. E., Jimenez, J. L., Kiendler-Scharr, A., Maen- haut, W., McFiggans, G., Mentel, Th. ...
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Latitudinal distributions of organic nitrogen and organic carbon in marine aerosols over the western North Pacific
... shown as a figure). These results clearly suggest that significant fractions of WION were mechanically produced through bubble bursting processes as a potential mecha- nism. Moreover, WION/WIOC ratios tend to increase ...
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