Physics
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.1145y&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 8, p. 1145-1148
Physics
37
Atmospheric Composition And Structure: Aerosols And Particles, Atmospheric Composition And Structure: Biosphere/Atmosphere Interactions, Atmospheric Composition And Structure: Troposphere-Composition And Chemistry
Scientific paper
Atmospheric oxidation of biogenic hydrocarbons, such as monoterpenes, is estimated to be a significant source of global aerosol. Whereas laboratory studies have established that photochemical oxidation of monoterpenes leads to aerosol formation, there are limited field studies detecting such oxidation products in ambient aerosols. Drawing on prior results of monoterpene product analysis under controlled smog chamber conditions, we have identified organic aerosol components attributable to monoterpene oxidation in two forest atmospheres, Kejimkujik National Park, Nova Scotia, Canada, and Big Bear, San Bernardino National Forest, California, U.S.A. The major identified aerosol products derived from α-pinene and β-pinene oxidation include pinic acid, pinonic acid, norpinonic acid and its isomers, hydroxy pinonaldehydes, and pinonaldehyde, concentrations of which in the aerosol phase are in the sub ngm-3 range. Identification of oxidation products in atmospheric aerosol samples serves as direct evidence for aerosol formation from monoterpenes under ambient conditions.
Blanchard Pierrette
Flagan Richard C.
Seinfeld John H.
Yu Jianzhen
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