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Atmospheric chemist...
Atmospheric chemistry in stereo : A new look at secondary organic aerosols from isoprene
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- Nozière, Barbara (author)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)
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- González, Nélida J. D. (author)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)
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- Borg-Karlson, Anna-Karin (author)
- KTH,Organisk kemi
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- Pei, Yuxin (author)
- KTH,Organisk kemi
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- Pettersson Redeby, Johan (author)
- KTH,Analytisk kemi
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- Krejci, Radovan (author)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)
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Dommen, Josef (author)
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Prevot, Andre S. H. (author)
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Anthonsen, Thorleif (author)
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(creator_code:org_t)
- 2011
- 2011
- English.
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In: Geophysical Research Letters. - 0094-8276 .- 1944-8007. ; 38, s. L11807-
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Isoprene, a compound emitted by vegetation, could be a major contributor to secondary organic aerosols (SOA) in the atmosphere. The main evidence for this contribution were the 2-methylbutane-1,2,3,4-tetraols, or 2-methyltetrols (2-methylerythritol and 2-methylthreitol) present in ambient aerosols. In this work, the four stereoisomers of these tetraols were analyzed in aerosols from Aspvreten, Sweden. 2-C-methyl-D-erythritol was found in excess over its enantiomer in the Spring/Summer, by up to 29% in July. This clearly indicated some biological origins for this enantiomer, consistent with its well-documented production by plants and other living organisms. In addition, a minimum of 20 to 60% of the mass of racemic tetraols appeared from biological origin. Thus, the SOA mass produced by isoprene in the atmosphere is less than what indicated by the 2-methyltetrols in aerosols. Our results also demonstrate that stereochemical speciation can distinguish primary and secondary organic material in atmospheric aerosols.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Keyword
- BOREAL FOREST AEROSOLS
- OXIDATION-PRODUCTS
- DIEL VARIATIONS
- UNITED-STATES
- 2-C-METHYL-D-ERYTHRITOL
- PHOTOOXIDATION
- PM2.5
- 2-METHYLTETROLS
- 2-C-METHYL-ERYTHRITOL
- BIOSYNTHESIS
- Environmental chemistry
- Miljökemi
Publication and Content Type
- ref (subject category)
- art (subject category)
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