title: On the Origin of AMS "Cooking Organic Aerosol" at a Rural Site.
abstract: A number of field observations employing aerosol mass spectrometers (AMS) have demonstrated that organic matter rich in monocarboxylic acids and aliphatic carbonyls originating from cooking activities (the COA factor) contributes significantly to ambient organic matter (OM) in urban environments. Little is known about the contribution and nature of COA in rural localities. We studied the correlation of COA with chemical tracers at a rural site in the Po Valley, Italy. Our statistical approach, based on positive matrix factorization (PMF) shows that the COA factor was clearly linked to local emissions of chloride and methanesulfonic acid (MSA), chemical tracers not associated with cooking emissions, or with combustion sources. While the association with Cl is not understood at this stage, the emission of reduced sulfur compounds, aliphatic carbonyls and monocarboxylic acids is consistent with several agricultural practices (e.g., manure storage) and waste disposal systems (e.g., landfills) which characterize the suburban and rural areas of the Po Valley and of other many populated environments. It is concluded that the nature and origins of the AMS COA factor measured at a rural site are complex and include far more than the emissions from food cooking.
authors.affiliation: Institut de Ciències del Mar, CSIC , Pg Marítim de la Barceloneta 37-49, 08003 Barcelona, Spain.|National Centre for Atmospheric Science School of Geography, Earth & Environmental Sciences, University of Birmingham Edgbaston , Birmingham, United Kingdom.|School of Physics, National University of Ireland , Galway, Ireland.
authors.forename: M
authors.initials: M
authors.lastname: Dall'Osto
authors.affiliation: National Research Council (CNR), Institute of Atmospheric Sciences and Climate (ISAC) , Via Gobetti 101, 40129 Bologna, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Paglione
authors.affiliation: National Research Council (CNR), Institute of Atmospheric Sciences and Climate (ISAC) , Via Gobetti 101, 40129 Bologna, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Decesari
authors.affiliation: National Research Council (CNR), Institute of Atmospheric Sciences and Climate (ISAC) , Via Gobetti 101, 40129 Bologna, Italy.
authors.forename: M C
authors.initials: MC
authors.lastname: Facchini
authors.affiliation: School of Physics, National University of Ireland , Galway, Ireland.
authors.forename: C
authors.initials: C
authors.lastname: O'Dowd
authors.affiliation: Meteorologische Observatorium Hohenpeißenberg, Albin Schwaiger Weg 10, 82383 Hohenpeißenberg, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Plass-Duellmer
authors.affiliation: National Centre for Atmospheric Science School of Geography, Earth & Environmental Sciences, University of Birmingham Edgbaston , Birmingham, United Kingdom.|Department of Environmental Sciences/Center of Excellence in Environmental Studies, King Abdulaziz University , P.O. Box 80203, Jeddah 21589, Saudi Arabia.
authors.forename: Roy M
authors.initials: RM
authors.lastname: Harrison
mesh_terms: D000336:Aerosols / Q000032:analysis*; D000383:Agriculture; D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D003296:Cooking; D007558:Italy; D008372:Manure; D013058:Mass Spectrometry / Q000379:methods*; D008698:Mesylates / Q000032:analysis; D012037:Refuse Disposal; D012424:Rural Population; D013457:Sulfur Compounds / Q000032:analysis; D064091:Waste Disposal Facilities
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D008372:Manure; D008698:Mesylates; D013457:Sulfur Compounds; C045880:methanesulfonic acid