TY - JOUR
T1 - Non-methane hydrocarbons and carbonyls in the Lower Fraser Valley during PACIFIC 2001
AU - Wang, D.
AU - Fuentes, J. D.
AU - Travers, D.
AU - Dann, T.
AU - Connolly, T.
N1 - Funding Information:
We thank Bruce Thomson, Wayne Belzer and the staff from EC Pacific and Yukon Region as well as John Deary and the staff from EC Meteorological Service of Canada for their excellent overall organizational and technical support. We also thank the GVRD, particularly Ken Stubbs, for his support to all aspects of the program, Katherine Hayden, Environment Canada, for providing CO and O 3 data and Jan Bottenheim, Environment Canada, for reviewing the paper and his helpful comments. Partial funding for this project was provided by Environment Canada, by the Georgia Basin Ecosystem Initiative, by the Panel on Energy Research and Development, and by the Canadian Foundation for Climate and Atmospheric Sciences. Two anonymous reviewers provided excellent comments to improve the final draft of the manuscript.
PY - 2005/9
Y1 - 2005/9
N2 - During August 2001, a field investigation was undertaken to determine the hydrocarbon and carbonyl loadings in the Lower Fraser Valley of British Columbia, Canada. Intensive ambient air sampling was carried out at sites representing urban and rural locales to identify and quantify atmospheric levels of non-methane hydrocarbon and carbonyl species. Results indicated that in the urban atmosphere (3-h) non-methane hydrocarbon levels exceeded 20 parts per billion (ppbv). Rural sites had lower levels of non-methane hydrocarbons. The dominant anthropogenic hydrocarbon species were propane, butane, 2-methylbutane and toluene. The most common biogenic hydrocarbons included isoprene, α-pinene, β-pinene and limonene. On average, biogenic hydrocarbons represented approximately 23% of the total hydrocarbon reactivity estimated for the airshed in the Lower Fraser Valley. Based on the hydroxyl radical-reactivity scale, limonene was determined to be the most photochemically relevant species at the urban site in the Lower Fraser Valley of British Columbia. Formaldehyde, acetaldehyde, and acetone were the dominant carbonyl compounds found in the Lower Fraser Valley. Three-hour averaged carbonyls levels reached 10 ppbv (3-h) and resulted from both direct emissions and hydrocarbon photooxidation. Atmospheric conditions strongly modulated the abundance of hydrocarbon and carbonyl compounds.
AB - During August 2001, a field investigation was undertaken to determine the hydrocarbon and carbonyl loadings in the Lower Fraser Valley of British Columbia, Canada. Intensive ambient air sampling was carried out at sites representing urban and rural locales to identify and quantify atmospheric levels of non-methane hydrocarbon and carbonyl species. Results indicated that in the urban atmosphere (3-h) non-methane hydrocarbon levels exceeded 20 parts per billion (ppbv). Rural sites had lower levels of non-methane hydrocarbons. The dominant anthropogenic hydrocarbon species were propane, butane, 2-methylbutane and toluene. The most common biogenic hydrocarbons included isoprene, α-pinene, β-pinene and limonene. On average, biogenic hydrocarbons represented approximately 23% of the total hydrocarbon reactivity estimated for the airshed in the Lower Fraser Valley. Based on the hydroxyl radical-reactivity scale, limonene was determined to be the most photochemically relevant species at the urban site in the Lower Fraser Valley of British Columbia. Formaldehyde, acetaldehyde, and acetone were the dominant carbonyl compounds found in the Lower Fraser Valley. Three-hour averaged carbonyls levels reached 10 ppbv (3-h) and resulted from both direct emissions and hydrocarbon photooxidation. Atmospheric conditions strongly modulated the abundance of hydrocarbon and carbonyl compounds.
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U2 - 10.1016/j.atmosenv.2005.05.035
DO - 10.1016/j.atmosenv.2005.05.035
M3 - Article
AN - SCOPUS:23944484048
SN - 1352-2310
VL - 39
SP - 5261
EP - 5272
JO - Atmospheric Environment
JF - Atmospheric Environment
IS - 29
ER -