Global-scale combustion sources of organic aerosols: sensitivity to formation and removal mechanisms
Organic compounds from combustion sources such as biomass burning and fossil fuel use are major contributors to the global atmospheric load of aerosols. We analyzed the sensitivity of model-predicted global-scale organic aerosols (OA) to parameters that control primary emissions, photochemical a...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2017-06-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | http://www.atmos-chem-phys.net/17/7345/2017/acp-17-7345-2017.pdf |
| _version_ | 1811342022807650304 |
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| author | A. P. Tsimpidi V. A. Karydis S. N. Pandis S. N. Pandis J. Lelieveld J. Lelieveld |
| author_facet | A. P. Tsimpidi V. A. Karydis S. N. Pandis S. N. Pandis J. Lelieveld J. Lelieveld |
| author_sort | A. P. Tsimpidi |
| collection | DOAJ |
| description | Organic compounds from combustion sources such as biomass burning
and fossil fuel use are major contributors to the global atmospheric load of
aerosols. We analyzed the sensitivity of model-predicted global-scale organic
aerosols (OA) to parameters that control primary emissions, photochemical
aging, and the scavenging efficiency of organic vapors. We used a
computationally efficient module for the description of OA composition and
evolution in the atmosphere (ORACLE) of the global chemistry–climate model
EMAC (ECHAM/MESSy Atmospheric Chemistry).
A global dataset of aerosol mass spectrometer (AMS) measurements was used to
evaluate simulated primary (POA) and secondary (SOA) OA concentrations. Model
results are sensitive to the emission rates of intermediate-volatility
organic compounds (IVOCs) and POA. Assuming enhanced reactivity of
semi-volatile organic compounds (SVOCs) and IVOCs with OH substantially
improved the model performance for SOA. The use of a hybrid approach for the
parameterization of the aging of IVOCs had a small effect on predicted SOA
levels. The model performance improved by assuming that freshly emitted
organic compounds are relatively hydrophobic and become increasingly
hygroscopic due to oxidation. |
| first_indexed | 2024-04-13T19:04:03Z |
| format | Article |
| id | doaj.art-d4e44c4cc2b04d60aa55a777eddc44c5 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-04-13T19:04:03Z |
| publishDate | 2017-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-d4e44c4cc2b04d60aa55a777eddc44c52022-12-22T02:34:01ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242017-06-01177345736410.5194/acp-17-7345-2017Global-scale combustion sources of organic aerosols: sensitivity to formation and removal mechanismsA. P. Tsimpidi0V. A. Karydis1S. N. Pandis2S. N. Pandis3J. Lelieveld4J. Lelieveld5Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, GermanyDepartment of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, GermanyDepartment of Chemical Engineering, University of Patras, Patras, GreeceDepartment of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA, USADepartment of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, GermanyEnergy, Environment and Water Research Center, Cyprus Institute, Nicosia, CyprusOrganic compounds from combustion sources such as biomass burning and fossil fuel use are major contributors to the global atmospheric load of aerosols. We analyzed the sensitivity of model-predicted global-scale organic aerosols (OA) to parameters that control primary emissions, photochemical aging, and the scavenging efficiency of organic vapors. We used a computationally efficient module for the description of OA composition and evolution in the atmosphere (ORACLE) of the global chemistry–climate model EMAC (ECHAM/MESSy Atmospheric Chemistry). A global dataset of aerosol mass spectrometer (AMS) measurements was used to evaluate simulated primary (POA) and secondary (SOA) OA concentrations. Model results are sensitive to the emission rates of intermediate-volatility organic compounds (IVOCs) and POA. Assuming enhanced reactivity of semi-volatile organic compounds (SVOCs) and IVOCs with OH substantially improved the model performance for SOA. The use of a hybrid approach for the parameterization of the aging of IVOCs had a small effect on predicted SOA levels. The model performance improved by assuming that freshly emitted organic compounds are relatively hydrophobic and become increasingly hygroscopic due to oxidation.http://www.atmos-chem-phys.net/17/7345/2017/acp-17-7345-2017.pdf |
| spellingShingle | A. P. Tsimpidi V. A. Karydis S. N. Pandis S. N. Pandis J. Lelieveld J. Lelieveld Global-scale combustion sources of organic aerosols: sensitivity to formation and removal mechanisms Atmospheric Chemistry and Physics |
| title | Global-scale combustion sources of organic aerosols: sensitivity to formation and removal mechanisms |
| title_full | Global-scale combustion sources of organic aerosols: sensitivity to formation and removal mechanisms |
| title_fullStr | Global-scale combustion sources of organic aerosols: sensitivity to formation and removal mechanisms |
| title_full_unstemmed | Global-scale combustion sources of organic aerosols: sensitivity to formation and removal mechanisms |
| title_short | Global-scale combustion sources of organic aerosols: sensitivity to formation and removal mechanisms |
| title_sort | global scale combustion sources of organic aerosols sensitivity to formation and removal mechanisms |
| url | http://www.atmos-chem-phys.net/17/7345/2017/acp-17-7345-2017.pdf |
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