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Observation of 2-methyltetrols and Related Photo-oxidation Products of Isoprene in Boreal Forest Aerosols from Hyytiälä, Finland : Volume 5, Issue 3 (09/05/2005)

By Kourtchev, I.

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Book Id: WPLBN0003979513
Format Type: PDF Article :
File Size: Pages 25
Reproduction Date: 2015

Title: Observation of 2-methyltetrols and Related Photo-oxidation Products of Isoprene in Boreal Forest Aerosols from Hyytiälä, Finland : Volume 5, Issue 3 (09/05/2005)  
Author: Kourtchev, I.
Volume: Vol. 5, Issue 3
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2005
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Ruuskanen, T., Kulmala, M., Maenhaut, W., Claeys, M., & Kourtchev, I. (2005). Observation of 2-methyltetrols and Related Photo-oxidation Products of Isoprene in Boreal Forest Aerosols from Hyytiälä, Finland : Volume 5, Issue 3 (09/05/2005). Retrieved from http://community.ebooklibrary.org/


Description
Description: Department of Pharmaceutical Sciences, University of Antwerp (Campus Drie Eiken), Universiteitsplein 1, B-2610 Antwerp, Belgium. Oxidation products of isoprene including 2-methyltetrols (2-methylthreitol and 2-methylerythritol), 2-methylglyceric acid and triol derivatives of isoprene (2-methyl-1,3,4-trihydroxy-1-butene (cis and trans) and 3-methyl-2,3,4-trihydroxy-1-butene) have been detected in boreal forest PM1 aerosols collected at Hyytiälä, southern Finland, during a 2004 summer period, at significant atmospheric concentrations (in total 51 ng m-3 in summer versus 0.46 ng m-3 in fall). On the basis of these results, it can be concluded that photo-oxidation of isoprene is an important atmospheric chemistry process that contributes to secondary organic aerosol formation during summer in this conifer forest ecosystem. In addition to isoprene oxidation products, malic acid, which can be regarded as an end-oxidation product of unsaturated fatty acids, was also detected at high concentrations during the summer period (46 ng m-3 in summer versus 5.2 ng m-3 in fall), while levoglucosan, originating from biomass burning, became relatively more important during the fall period (29 ng m-3 in fall versus 10 ng m-3 in summer). Pinic acid, a major photo-oxidation product of Α-pinene in laboratory experiments, could only be detected at trace levels in the summer PM1 aerosol samples from Hyytiälä, suggesting that further oxidation of pinic acid occurs and/or that different oxidation pathways are followed. We hypothesize that photo-oxidation of isoprene may participate in the early stages of new particle formation, a phenomenon which has been well documented in the boreal forest environment.

Summary
Observation of 2-methyltetrols and related photo-oxidation products of isoprene in boreal forest aerosols from Hyytiälä, Finland

 

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