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Impact of dry deposition of semi-volatile organic compounds on secondary organic aerosols |
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| Authors: | Bertrand Bessagnet Christian Seigneur Laurent Menut |
| Institution: | 1. United States Environmental Protection Agency, National Risk Management Research Laboratory, Research Triangle Park, NC 27711, USA;2. United States Environmental Protection Agency, National Exposure Research Laboratory, Research Triangle Park, NC 27711, USA;3. University of California, Irvine, CA 92697-3100, USA;4. Nicholas School of the Environment and Earth Sciences, Duke University, Durham, NC 27708, USA |
| Abstract: | Dry deposition of semi-volatile organic compounds (SVOC) is not currently treated in most chemical transport models of air quality and this omission has been identified as a possible major source of uncertainty. The effect of dry deposition of SVOC on the concentration of secondary organic aerosols (SOA) is investigated in summertime with the chemical transport model CHIMERE that simulates SOA concentrations by means of molecular SOA surrogate species. Omitting dry deposition could overestimate SOA concentrations by as much as 50%. This overestimation is larger during nighttime due to higher relative humidity. |
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