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Photochemical aerosol formation from α-pinene- and β-pinene

Zhang, Shou-Hua and Shaw, Martha and Seinfeld, John H. and Flagan, Richard C. (1992) Photochemical aerosol formation from α-pinene- and β-pinene. Journal of Geophysical Research. Atmospheres, 97 (D18). pp. 20717-20729. ISSN 2169-897X. doi:10.1029/92JD02156.

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Aerosol formation from α-pinene and β-pinene was studied in a series of outdoor smog chamber experiments. Since a previous study focused on β-pinene (Pandis et al., 1991), more attention was given here to α-pinene. The initial hydrocarbon and NOₓ concentrations ranged from 37 to 582 ppb and 31 to 380 ppb, respectively. The aerosol carbon yield, the fraction of the carbon initially present that is converted to aerosol, varied from 0 to 5.3% for α-pinene, depending on the initial hydrocarbon-to-NOₓ ratio. Dual-bag experiments demonstrate that α-pinene is more rapidly photooxidized, and produces higher yields of both aerosol and ozone in a given period of time than β-pinene, although given sufficient time β-pinene can produce equivalent aerosol yields. Although aerosol formation solely from isoprene photooxidation was found in a previous study to be negligible under ambient conditions, the addition of isoprene to the α-pinene/NOₓ system leads to an increased aerosol yield through the enhanced photochemical activity generated.

Item Type:Article
Related URLs:
URLURL TypeDescription
Seinfeld, John H.0000-0003-1344-4068
Flagan, Richard C.0000-0001-5690-770X
Additional Information:© 1992 American Geophysical Union. Received June 1, 1992; revised August 21, 1992; accepted September 1, 1992. This work was supported by the Coordinating Research Council, project AQ-3-2, and National Science Foundation grant ATM-9003186.
Funding AgencyGrant Number
Coordinating Research CouncilAQ-3-2
Issue or Number:D18
Record Number:CaltechAUTHORS:20141028-091812090
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Official Citation:Zhang, S.-H., M. Shaw, J. H. Seinfeld, and R. C. Flagan (1992), Photochemical aerosol formation from α-pinene- and β-pinene, J. Geophys. Res., 97(D18), 20717–20729, doi:10.1029/92JD02156.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50915
Deposited On:28 Oct 2014 19:14
Last Modified:19 Apr 2023 22:55

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