Reactions of OH with. alpha. -pinene and. beta. -pinene in air: Estimate of global CO production from the atmosphere oxidation of terpenes

Journal Article · Sun Jan 20 00:00:00 EST 1991 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/90JD02341· OSTI ID:5401383

Hatakeyama, Shiro; Izumi, Katsuyuki; Fukuyama, Tsutomu; Akimoto, Hajime; Washida, Nobuaki ^[1]

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1. National Institute for Environmental Studies, Ibaraki (Japan)

Reactions of OH with {alpha}-pinene and {beta}-pinene were studied for the purpose of obtaining the basic data to estimate the emission rate of CO from the photooxidation of terpenes in the atmosphere. In the presence of NO the main product was pinonaldehyde and 6,6-dimethylbicyclo(3.1.1)heptan-2-one from {alpha}- and {beta}-pinene, respectively, and the yield was 56{plus minus}4 and 79{plus minus}8%, respectively. In the absence of NO the yield was remarkably lower, and the yield of organic aerosols was enhanced. For {alpha}-pinene 56 {plus minus} 3% was obtained as a yield of aerosols on the carbon number basis. Gross annual emission of CO from the reactions of OH with terpenes was estimated to be 22 Tg C/yr (50 Tg CO/yr) by regarding {alpha}-pinene as the representative of terpenes, on the basis of the annual emission rate of terpenes, estimated lifetime of pinenes in the atmosphere, the apparent rate constant for the intermediate to form CO, and the estimated yield of CO from the secondary oxidation of pinonaldehyde. The ultimate yield of CO from the tropospheric oxidation of terpenes (including both ozone and OH reactions) was estimated to be 20% on the carbon number basis, and the total annual emission of CO was evaluated to be 96 Tg C/yr (222 Tg CO/yr).

• OSTI ID: 5401383
• Journal Information: Journal of Geophysical Research; (United States), Vol. 96:D1; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CARBON MONOXIDE
SYNTHESIS
HYDROCARBONS
PHOTOCHEMICAL REACTIONS
AEROSOLS
ALDEHYDES
ALKENES
ATMOSPHERIC CHEMISTRY
CHEMICAL REACTION YIELD
EMISSION
HYDROXYL RADICALS
ISOMERS
NITRIC OXIDE
OXIDATION
OZONE
TROPOSPHERE
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
COLLOIDS
DISPERSIONS
EARTH ATMOSPHERE
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADICALS
SOLS
YIELDS
540110*