GSTDTAP  > 地球科学
DOI10.5194/acp-17-4305-2017
Chemical transport model simulations of organic aerosol in southern California: model evaluation and gasoline and diesel source contributions
Jathar, Shantanu H.1; Woody, Matthew2; Pye, Havala O. T.2; Baker, Kirk R.2; Robinson, Allen L.3
2017-03-30
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2017
卷号17期号:6
文章类型Article
语种英语
国家USA
英文摘要

Gasoline-and diesel-fueled engines are ubiquitous sources of air pollution in urban environments. They emit both primary particulate matter and precursor gases that react to form secondary particulate matter in the atmosphere. In this work, we updated the organic aerosol module and organic emissions inventory of a three-dimensional chemical transport model, the Community Multiscale Air Quality Model (CMAQ), using recent, experimentally derived inputs and parameterizations for mobile sources. The updated model included a revised volatile organic compound (VOC) speciation for mobile sources and secondary organic aerosol (SOA) formation from unspeciated intermediate volatility organic compounds (IVOCs). The updated model was used to simulate air quality in southern California during May and June 2010, when the California Research at the Nexus of Air Quality and Climate Change (CalNex) study was conducted. Compared to the Traditional version of CMAQ, which is commonly used for regulatory applications, the updated model did not significantly alter the predicted organic aerosol (OA) mass concentrations but did substantially improve predictions of OA sources and composition (e. g., POA-SOA split), as well as ambient IVOC concentrations. The updated model, despite substantial differences in emissions and chemistry, performed similar to a recently released research version of CMAQ (Woody et al., 2016) that did not include the updated VOC and IVOC emissions and SOA data. Mobile sources were predicted to contribute 30-40% of the OA in southern California (half of which was SOA), making mobile sources the single largest source contributor to OA in southern California. The remainder of the OA was at-tributed to non-mobile anthropogenic sources (e. g., cooking, biomass burning) with biogenic sources contributing to less than 5% to the total OA. Gasoline sources were predicted to contribute about 13 times more OA than diesel sources; this difference was driven by differences in SOA production. Model predictions highlighted the need to better constrain multi-generational oxidation reactions in chemical transport models.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000397941100002
WOS关键词BASIS-SET APPROACH ; STATISTICAL OXIDATION MODEL ; ON-ROAD GASOLINE ; AIR-QUALITY ; PARTICULATE MATTER ; MASS-SPECTROMETRY ; PRIMARY EMISSIONS ; VEHICLE EXHAUST ; UNITED-STATES ; SECONDARY
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/30801
专题地球科学
作者单位1.Colorado State Univ, Mech Engn, Ft Collins, CO 80525 USA;
2.US EPA, Res Triangle Pk, NC 27711 USA;
3.Carnegie Mellon Univ, Mech Engn, Pittsburgh, PA 15213 USA
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Jathar, Shantanu H.,Woody, Matthew,Pye, Havala O. T.,et al. Chemical transport model simulations of organic aerosol in southern California: model evaluation and gasoline and diesel source contributions[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(6).
APA Jathar, Shantanu H.,Woody, Matthew,Pye, Havala O. T.,Baker, Kirk R.,&Robinson, Allen L..(2017).Chemical transport model simulations of organic aerosol in southern California: model evaluation and gasoline and diesel source contributions.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(6).
MLA Jathar, Shantanu H.,et al."Chemical transport model simulations of organic aerosol in southern California: model evaluation and gasoline and diesel source contributions".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.6(2017).
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