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Contribution of isoprene to formaldehyde and ozone formation based on its oxidation products measurement in Beijing, China
AbstractThe atmospheric mixing ratios of methacrolein (MACR) and methyl vinyl ketone (MVK), the two specific products from isoprene oxidation in the atmosphere, were measured in Beijing from March to November, 2006. Distinct amounts of MACR and MVK were detected during vegetable growing seasons from April to October with ambient levels of 0.11–0.67ppbv and 0.19–1.36ppbv, respectively. The reacted isoprene and its ozone formation potentials (OFPs) in Beijing were evaluated in the range of 0.49–3.46ppbv and 6.4–44.7ppbv, respectively, from April to October. OFP of the reacted isoprene accounted for 10.6–23.6% of the total OFPs of VOCs (including carbonyls and isoprene) and 6.38–29.9% of the photo-chemically produced ozone. The maximum OFP of the original emitted isoprene prior to its photo-oxidation was calculated as 56.0ppbv in August. The contribution from the reacted isoprene in Beijing to HCHO formation was also estimated to be in the range of 0.35–2.45ppbv from April to October, which accounted for 4.6–11.5% of ambient HCHO.
Contribution of isoprene to formaldehyde and ozone formation based on its oxidation products measurement in Beijing, China
AbstractThe atmospheric mixing ratios of methacrolein (MACR) and methyl vinyl ketone (MVK), the two specific products from isoprene oxidation in the atmosphere, were measured in Beijing from March to November, 2006. Distinct amounts of MACR and MVK were detected during vegetable growing seasons from April to October with ambient levels of 0.11–0.67ppbv and 0.19–1.36ppbv, respectively. The reacted isoprene and its ozone formation potentials (OFPs) in Beijing were evaluated in the range of 0.49–3.46ppbv and 6.4–44.7ppbv, respectively, from April to October. OFP of the reacted isoprene accounted for 10.6–23.6% of the total OFPs of VOCs (including carbonyls and isoprene) and 6.38–29.9% of the photo-chemically produced ozone. The maximum OFP of the original emitted isoprene prior to its photo-oxidation was calculated as 56.0ppbv in August. The contribution from the reacted isoprene in Beijing to HCHO formation was also estimated to be in the range of 0.35–2.45ppbv from April to October, which accounted for 4.6–11.5% of ambient HCHO.
Contribution of isoprene to formaldehyde and ozone formation based on its oxidation products measurement in Beijing, China
Pang, Xiaobing (author) / Mu, Yujing (author) / Zhang, Yujie (author) / Lee, Xinqing (author) / Yuan, Juan (author)
Atmospheric Environment ; 43 ; 2142-2147
2009-01-16
6 pages
Article (Journal)
Electronic Resource
English
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