Toward a general parameterization of N<sub>2</sub>O<sub>5</sub> reactivity on aqueous particles: the competing effects of particle liquid water, nitrate and chloride
The heterogeneous reaction of N<sub>2</sub>O<sub>5</sub> on mixed organic-inorganic aerosol particles was investigated using an entrained aerosol flow tube coupled to a custom-built chemical ionization mass spectrometer. Laboratory results on aqueous particles confirm a stron...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2009-11-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/9/8351/2009/acp-9-8351-2009.pdf |
| _version_ | 1818211103456362496 |
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| author | T. H. Bertram J. A. Thornton |
| author_facet | T. H. Bertram J. A. Thornton |
| author_sort | T. H. Bertram |
| collection | DOAJ |
| description | The heterogeneous reaction of N<sub>2</sub>O<sub>5</sub> on mixed organic-inorganic aerosol particles was investigated using an entrained aerosol flow tube coupled to a custom-built chemical ionization mass spectrometer. Laboratory results on aqueous particles confirm a strong dependence of the reactive uptake coefficient (γ) on particle liquid water, for particle water concentrations below 15 M, and the molar ratio of particle water to nitrate. Measurements of γ (N<sub>2</sub>O<sub>5</sub>) on mixed chloride-nitrate particles indicate that the presence of trace chloride can negate the suppression of γ(N<sub>2</sub>O<sub>5</sub>) at high nitrate loadings with implications for polluted coastal regions. These results are used to construct a new parameterization for γ (N<sub>2</sub>O<sub>5</sub>), that when coupled to an aerosol thermodynamics model, can be used within regional and/or global chemical transport models. |
| first_indexed | 2024-12-12T05:27:11Z |
| format | Article |
| id | doaj.art-e1aa344eb41a47578a16cdbf21ec6844 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-12T05:27:11Z |
| publishDate | 2009-11-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-e1aa344eb41a47578a16cdbf21ec68442022-12-22T00:36:25ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242009-11-0192183518363Toward a general parameterization of N<sub>2</sub>O<sub>5</sub> reactivity on aqueous particles: the competing effects of particle liquid water, nitrate and chlorideT. H. BertramJ. A. ThorntonThe heterogeneous reaction of N<sub>2</sub>O<sub>5</sub> on mixed organic-inorganic aerosol particles was investigated using an entrained aerosol flow tube coupled to a custom-built chemical ionization mass spectrometer. Laboratory results on aqueous particles confirm a strong dependence of the reactive uptake coefficient (γ) on particle liquid water, for particle water concentrations below 15 M, and the molar ratio of particle water to nitrate. Measurements of γ (N<sub>2</sub>O<sub>5</sub>) on mixed chloride-nitrate particles indicate that the presence of trace chloride can negate the suppression of γ(N<sub>2</sub>O<sub>5</sub>) at high nitrate loadings with implications for polluted coastal regions. These results are used to construct a new parameterization for γ (N<sub>2</sub>O<sub>5</sub>), that when coupled to an aerosol thermodynamics model, can be used within regional and/or global chemical transport models.http://www.atmos-chem-phys.net/9/8351/2009/acp-9-8351-2009.pdf |
| spellingShingle | T. H. Bertram J. A. Thornton Toward a general parameterization of N<sub>2</sub>O<sub>5</sub> reactivity on aqueous particles: the competing effects of particle liquid water, nitrate and chloride Atmospheric Chemistry and Physics |
| title | Toward a general parameterization of N<sub>2</sub>O<sub>5</sub> reactivity on aqueous particles: the competing effects of particle liquid water, nitrate and chloride |
| title_full | Toward a general parameterization of N<sub>2</sub>O<sub>5</sub> reactivity on aqueous particles: the competing effects of particle liquid water, nitrate and chloride |
| title_fullStr | Toward a general parameterization of N<sub>2</sub>O<sub>5</sub> reactivity on aqueous particles: the competing effects of particle liquid water, nitrate and chloride |
| title_full_unstemmed | Toward a general parameterization of N<sub>2</sub>O<sub>5</sub> reactivity on aqueous particles: the competing effects of particle liquid water, nitrate and chloride |
| title_short | Toward a general parameterization of N<sub>2</sub>O<sub>5</sub> reactivity on aqueous particles: the competing effects of particle liquid water, nitrate and chloride |
| title_sort | toward a general parameterization of n sub 2 sub o sub 5 sub reactivity on aqueous particles the competing effects of particle liquid water nitrate and chloride |
| url | http://www.atmos-chem-phys.net/9/8351/2009/acp-9-8351-2009.pdf |
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