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Mohr, C.* ; DeCarlo, P.F.* ; Heringa, M.F.* ; Chirico, R.* ; Slowik, J.G.* ; Richter, R.* ; Reche, C.* ; Alastuey, A.* ; Querol, X.* ; Seco, R.* ; Penuelas, J.* ; Jimenez, J.L.* ; Crippa, M.* ; Zimmermann, R. ; Baltensperger, U.* ; Prevot, A.S.H.*

Identification and quantification of organic aerosol from cooking and other sources in Barcelona using aerosol mass spectrometer data.

Atmos. Chem. Phys. 12, 1649-1665 (2012)

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PM1 (particulate matter with an aerodynamic diameter <1 mu m) non-refractory components and black carbon were measured continuously together with additional air quality and atmospheric parameters at an urban background site in Barcelona, Spain, during March 2009 (campaign DAURE, Determination of the sources of atmospheric Aerosols in Urban and Rural Environments in the western Mediterranean). Positive matrix factorization (PMF) was conducted on the organic aerosol (OA) data matrix measured by an aerosol mass spectrometer, on both unit mass (UMR) and high resolution (HR) data. Five factors or sources could be identified: LV-OOA (low-volatility oxygenated OA), related to regional, aged secondary OA; SV-OOA (semi-volatile oxygenated OA), a fresher oxygenated OA; HOA (hydrocarbon-like OA, related to traffic emissions); BBOA (biomass burning OA) from domestic heating or agricultural biomass burning activities; and COA (cooking OA). LV-OOA contributed 28% to OA, SV-OOA 27%, COA 17%, HOA 16%, and BBOA 11%. The COA HR spectrum contained substantial signal from oxygenated ions (O:C: 0.21) whereas the HR HOA spectrum had almost exclusively contributions from chemically reduced ions (O: C: 0.03). If we assume that the carbon in HOA is fossil while that in COA and BBOA is modern, primary OA in Barcelona contains a surprisingly high fraction (59%) of non-fossil carbon.

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