Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of α-pinene
The yield of particle mass in secondary organic aerosol (SOA) formed by dark ozonolysis was measured for 0.3–22.8 ppbv of reacted α-pinene. Most experiments were conducted using a continuous-flow chamber, allowing nearly constant SOA concentration and chemical composition...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2008-04-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/8/2073/2008/acp-8-2073-2008.pdf |
| _version_ | 1818833153403387904 |
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| author | J. E. Shilling Q. Chen S. M. King T. Rosenoern J. H. Kroll D. R. Worsnop K. A. McKinney S. T. Martin |
| author_facet | J. E. Shilling Q. Chen S. M. King T. Rosenoern J. H. Kroll D. R. Worsnop K. A. McKinney S. T. Martin |
| author_sort | J. E. Shilling |
| collection | DOAJ |
| description | The yield of particle mass in secondary organic aerosol (SOA) formed by dark ozonolysis was measured for 0.3&ndash;22.8 ppbv of reacted &alpha;-pinene. Most experiments were conducted using a continuous-flow chamber, allowing nearly constant SOA concentration and chemical composition for several days. For comparison, some experiments were also conducted in batch mode. Reaction conditions were 25&deg;C, 40% RH, dry (NH<sub>4</sub>)SO<sub>4</sub> seed particles, and excess 1-butanol. The organic particle loading was independently measured by an aerosol mass spectrometer and a scanning mobility particle sizer, and the two measurements agreed well. The observations showed that SOA formation occurred for even the lowest reacted &alpha;-pinene concentration of 0.3 ppbv. The particle mass yield was 0.09 at 0.15 &mu;g m<sup>&minus;3</sup>, increasing to 0.27 at 40 &mu;g m<sup>&minus;3</sup>. Compared to some results reported in the literature, the yields were 80 to 100% larger for loadings above 2 &mu;g m<sup>&minus;3</sup>. At lower loadings, the yields had an offset of approximately +0.07 from those reported in the literature. To as low as 0.15 &mu;m<sup>&minus;3</sup>, the yield curve had no inflection point toward null yield, implying the formation of one or several products having vapor pressures below this value. These observations of increased yields, especially for low loadings, are potentially important for accurate prediction by chemical transport models of organic particle concentrations in the ambient atmosphere. |
| first_indexed | 2024-12-19T02:14:24Z |
| format | Article |
| id | doaj.art-158e0c4084b64e058d3a16c7490aeabe |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-19T02:14:24Z |
| publishDate | 2008-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-158e0c4084b64e058d3a16c7490aeabe2022-12-21T20:40:28ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242008-04-018720732088Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of α-pineneJ. E. ShillingQ. ChenS. M. KingT. RosenoernJ. H. KrollD. R. WorsnopK. A. McKinneyS. T. MartinThe yield of particle mass in secondary organic aerosol (SOA) formed by dark ozonolysis was measured for 0.3&ndash;22.8 ppbv of reacted &alpha;-pinene. Most experiments were conducted using a continuous-flow chamber, allowing nearly constant SOA concentration and chemical composition for several days. For comparison, some experiments were also conducted in batch mode. Reaction conditions were 25&deg;C, 40% RH, dry (NH<sub>4</sub>)SO<sub>4</sub> seed particles, and excess 1-butanol. The organic particle loading was independently measured by an aerosol mass spectrometer and a scanning mobility particle sizer, and the two measurements agreed well. The observations showed that SOA formation occurred for even the lowest reacted &alpha;-pinene concentration of 0.3 ppbv. The particle mass yield was 0.09 at 0.15 &mu;g m<sup>&minus;3</sup>, increasing to 0.27 at 40 &mu;g m<sup>&minus;3</sup>. Compared to some results reported in the literature, the yields were 80 to 100% larger for loadings above 2 &mu;g m<sup>&minus;3</sup>. At lower loadings, the yields had an offset of approximately +0.07 from those reported in the literature. To as low as 0.15 &mu;m<sup>&minus;3</sup>, the yield curve had no inflection point toward null yield, implying the formation of one or several products having vapor pressures below this value. These observations of increased yields, especially for low loadings, are potentially important for accurate prediction by chemical transport models of organic particle concentrations in the ambient atmosphere.http://www.atmos-chem-phys.net/8/2073/2008/acp-8-2073-2008.pdf |
| spellingShingle | J. E. Shilling Q. Chen S. M. King T. Rosenoern J. H. Kroll D. R. Worsnop K. A. McKinney S. T. Martin Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of α-pinene Atmospheric Chemistry and Physics |
| title | Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of α-pinene |
| title_full | Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of α-pinene |
| title_fullStr | Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of α-pinene |
| title_full_unstemmed | Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of α-pinene |
| title_short | Particle mass yield in secondary organic aerosol formed by the dark ozonolysis of α-pinene |
| title_sort | particle mass yield in secondary organic aerosol formed by the dark ozonolysis of α pinene |
| url | http://www.atmos-chem-phys.net/8/2073/2008/acp-8-2073-2008.pdf |
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