Direct measurement of particle formation and growth from the oxidation of biogenic emissions. VanReken, T., M., Greenberg, J., P., Harley, P., C., Guenther, A., B., & Smith, J., N. Atmospheric Chemistry and Physics, 6:4403-4413, 2006. abstract bibtex A new facility has been developed to investigate the formation of new particles from the oxidation of volatile organic compounds emitted from vegetation. The facility consists of a biogenic emissions enclosure, an aerosol growth chamber, and the associated instrumentation. Using the facility, new particle formation events have been induced through the reaction of ozone with three different precursor gas mixtures: an alpha-pinene test mixture and the emissions of a Holm oak ( Quercus ilex) specimen and a loblolly pine ( Pinus taeda) specimen. The results demonstrate the variability between species in their potential to form new aerosol products. The emissions of Q. ilex specimen resulted in fewer particles than did alpha-pinene, although the concentration of monoterpenes was roughly equal in both experiments before the addition of ozone. Conversely, the oxidation of P. taeda specimen emissions led to the formation of more particles than either of the other two gas mixtures, despite a lower initial terpenoid concentration. These variations can be attributed to differences in the speciation of the vegetative emissions with respect to the alpha-pinene mixture and to each other. Specifically, the presence of beta-pinene and other slower-reacting monoterpenes probably inhibited particle formation in the Q. ilex experiment, while the presence of sesquiterpenes, including beta-caryophyllene, in the emissions of the P. taeda specimen were the likely cause of the more intense particle formation events observed during that experiment.
@article{
title = {Direct measurement of particle formation and growth from the oxidation of biogenic emissions},
type = {article},
year = {2006},
keywords = {forest,gas,hydrocarbons,monoterpenes,organic aerosol,ozonolysis,products,rates,vocs},
pages = {4403-4413},
volume = {6},
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notes = {089FR<br/>Times Cited:25<br/>Cited References Count:31},
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abstract = {A new facility has been developed to investigate the formation of new particles from the oxidation of volatile organic compounds emitted from vegetation. The facility consists of a biogenic emissions enclosure, an aerosol growth chamber, and the associated instrumentation. Using the facility, new particle formation events have been induced through the reaction of ozone with three different precursor gas mixtures: an alpha-pinene test mixture and the emissions of a Holm oak ( Quercus ilex) specimen and a loblolly pine ( Pinus taeda) specimen. The results demonstrate the variability between species in their potential to form new aerosol products. The emissions of Q. ilex specimen resulted in fewer particles than did alpha-pinene, although the concentration of monoterpenes was roughly equal in both experiments before the addition of ozone. Conversely, the oxidation of P. taeda specimen emissions led to the formation of more particles than either of the other two gas mixtures, despite a lower initial terpenoid concentration. These variations can be attributed to differences in the speciation of the vegetative emissions with respect to the alpha-pinene mixture and to each other. Specifically, the presence of beta-pinene and other slower-reacting monoterpenes probably inhibited particle formation in the Q. ilex experiment, while the presence of sesquiterpenes, including beta-caryophyllene, in the emissions of the P. taeda specimen were the likely cause of the more intense particle formation events observed during that experiment.},
bibtype = {article},
author = {VanReken, T M and Greenberg, J P and Harley, P C and Guenther, A B and Smith, J N},
journal = {Atmospheric Chemistry and Physics}
}
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