title: Characterization of primary organic aerosol emissions from meat cooking, trash burning, and motor vehicles with high-resolution aerosol mass spectrometry and comparison with ambient and chamber observations.
abstract: Organic aerosol (OA) emissions from motor vehicles, meat-cooking and trash burning are analyzed here using a high-resolution aerosol mass spectrometer (AMS). High resolution data show that aerosols emitted by combustion engines and plastic burning are dominated by hydrocarbon-like organic compounds. Meat cooking and especially paper burning emissions contain significant fractions of oxygenated organic compounds; however, their unit-resolution mass spectral signatures are very similar to those from ambient hydrocarbon-like OA, and very different from the mass spectra of ambient secondary or oxygenated OA (OOA). Thus, primary OA from these sources is unlikelyto be a significant direct source of ambient OOA. There are significant differences in high-resolution tracer m/zs that may be useful for differentiating some of these sources. Unlike in most ambient spectra, all of these sources have low total m/z 44 and this signal is not dominated by the CO2+ ion. All sources have high m/z 57, which is low during high OOA ambient periods. Spectra from paper burning are similar to some types of biomass burning OA, with elevated m/z 60. Meat cooking aerosols also have slightly elevated m/z 60, whereas motor vehicle emissions have very low signal at this m/z.
authors.affiliation: Cooperative Institute for Research in the Environmental Sciences, Department of Chemistry and Biochemistry, University of Colorado, Boulder, USA.
authors.forename: Claudia
authors.initials: C
authors.lastname: Mohr
authors.forename: Alex
authors.initials: A
authors.lastname: Huffman
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Cubison
authors.forename: Allison C
authors.initials: AC
authors.lastname: Aiken
authors.forename: Kenneth S
authors.initials: KS
authors.lastname: Docherty
authors.forename: Joel R
authors.initials: JR
authors.lastname: Kimmel
authors.forename: Ingrid M
authors.initials: IM
authors.lastname: Ulbrich
authors.forename: Michael
authors.initials: M
authors.lastname: Hannigan
authors.forename: Jose L
authors.initials: JL
authors.lastname: Jimenez
mesh_terms: D000336:Aerosols / Q000032:analysis*; D003296:Cooking; D017745:Incineration; D013058:Mass Spectrometry / Q000379:methods*; D008460:Meat; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000336:Aerosols; D001335:Vehicle Emissions