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• W3204652502 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Volatile chemical products (VCPs) are commonly used consumer and industrial items that are an important source of anthropogenic emissions. Organic compounds from VCPs evaporate on atmospherically relevant timescales and include many species that are secondary organic aerosol (SOA) precursors. However, the chemistry leading to SOA, particularly that of intermediate-volatility organic compounds (IVOCs), has not been fully represented in regional-scale models such as the Community Multiscale Air Quality (CMAQ) model, which tend to underpredict SOA concentrations in urban areas. Here we develop a model to represent SOA formation from VCP emissions. The model incorporates a new VCP emissions inventory and employs three new classes of emissions: siloxanes, oxygenated IVOCs, and nonoxygenated IVOCs. VCPs are estimated to produce 1.67 <span class=inline-formula>µ</span>g m<span class=inline-formula>^−3</span> of noontime SOA, doubling the current model predictions and reducing the SOA mass concentration bias from <span class=inline-formula>−</span>75 % to <span class=inline-formula>−</span>58 % when compared to observations in Los Angeles in 2010. While oxygenated and nonoxygenated intermediate-volatility VCP species are emitted in similar quantities, SOA formation is dominated by the nonoxygenated IVOCs. Formaldehyde and SOA show similar relationships to temperature and bias signatures, indicating common sources and/or chemistry. This work suggests that VCPs contribute up to half of anthropogenic SOA in Los Angeles and models must better represent SOA precursors from VCPs to predict the urban enhancement of SOA." @default.
• W3204652502 created "2021-10-11" @default.
• W3204652502 creator A5075994489 @default.
• W3204652502 date "2021-09-23" @default.
• W3204652502 modified "2023-10-16" @default.
• W3204652502 title "Comment on acp-2021-547" @default.
• W3204652502 doi "https://doi.org/10.5194/acp-2021-547-ac1" @default.
• W3204652502 hasPublicationYear "2021" @default.
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