Identification of marine and continental aerosol sources in Paris using high resolution aerosol mass spectrometry. Issue 4 (19th February 2013)

• Record Type: Journal Article
• Authors: Crippa, Monica; El Haddad, Imad; Slowik, Jay G.; DeCarlo, Peter F.; Mohr, Claudia; Heringa, Maarten F.; Chirico, Roberto; Marchand, Nicolas; Sciare, Jean; Baltensperger, Urs; Prévôt, André S. H.
• Is Part Of: Journal of geophysical research. Volume 118:Issue 4(2013:Apr.)
• Page Start: 1950
• Page End: 1963
• Publication Date: 2013-02-19
• Subjects: aerosol mass spectrometry -- source apportionment -- urban aerosol -- marine aerosol; Atmospheric physics -- Periodicals; Geophysics -- Periodicals; 551.5
• DOI: 10.1002/jgrd.50151
• Languages: English
• ISSNs: 2169-897X

Abstract

Abstract : [1] Major summertime aerosol emission sources in Paris were assessed using a high resolution time‐of‐flight aerosol mass spectrometer (HR‐ToF‐AMS). The application of positive matrix factorization (PMF) to the highly mass and time‐resolved AMS measurements allowed the identification of primary and secondary sources of organic (OA) and sulfate aerosols. Primary anthropogenic emissions contributed on average ~27% (14.7% cooking, 12% traffic) to the total organic mass, while the major contribution to the organic fraction was associated with secondary formation products. Low‐volatility oxygenated OA (LV‐OOA, 25.2%) and semi‐volatile oxygenated OA (SV‐OOA, 32.4%) factors were classified as SOA. An additional component with high S : C and O : C ratios was identified and attributed to marine emissions (marine organic aerosol, MOA), owing to its high correlation with methanesulfonic acid (R 2 = 0.84) and contributing on average 15.7% to the total OA mass, even in the continental megacity of Paris. Non‐sea salt sulfate was apportioned by including both organic and sulfate ions in the PMF data matrix. This allowed apportionment of submicron sulfate to continental versus marine sources. A detailed source apportionment of PM1 combining AMS, aethalometer, and filter data is presented. Key Points: Regional aerosol sources have large effects on Paris air quality Marine aerosols affect the continental megacity of Paris Discrimination of several secondary organic aerosol formation mechanisms