title: Tracing of aerosol sources in an urban environment using chemical, Sr isotope, and mineralogical characterization.
abstract: In the framework of two national research projects (ORGANOSOL and CN-linkAIR), fine particulate matter (PM2.5) was sampled for 17 months at an urban location in the Western European Coast. The PM2.5samples were analyzed for organic carbon (OC), water-soluble organic carbon (WSOC), elemental carbon (EC), major water-soluble inorganic ions, mineralogical, and for the first time in this region, strontium isotope (87Sr/86Sr) composition. Organic matter dominates the identifiable urban PM2.5mass, followed by secondary inorganic aerosols. The acquired data resulted also in a seasonal overview of the carbonaceous and inorganic aerosol composition, with an important contribution from primary biomass burning and secondary formation processes in colder and warmer periods, respectively. The fossil-related primary EC seems to be continually present throughout the sampling period. The87Sr/86Sr ratios were measured on both the labile and residual PM2.5fractions as well as on the bulk PM2.5samples. Regardless of the air mass origin, the residual fractions are more radiogenic (representative of a natural crustal dust source) than the labile fractions, whose87Sr/86Sr ratios are comparable to that of seawater. The87Sr/86Sr ratios and the mineralogical composition data further suggest that sea salt and mineral dust are important primary natural sources of fine aerosols throughout the sampling period.
authors.affiliation: Department of Chemistry, CICECO and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal. regina.duarte@ua.pt.
authors.forename: Regina M B O
authors.initials: RM
authors.lastname: Duarte
authors.affiliation: Department of Chemistry and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
authors.forename: João T V
authors.initials: JT
authors.lastname: Matos
authors.affiliation: Department of Chemistry and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
authors.forename: Andreia S
authors.initials: AS
authors.lastname: Paula
authors.affiliation: Department of Chemistry and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
authors.forename: Sónia P
authors.initials: SP
authors.lastname: Lopes
authors.affiliation: Department of Geosciences and GeoBioTec, University of Aveiro, 3810-193, Aveiro, Portugal.
authors.forename: Sara
authors.initials: S
authors.lastname: Ribeiro
authors.affiliation: Department of Geosciences and GeoBioTec, University of Aveiro, 3810-193, Aveiro, Portugal.
authors.forename: José Francisco
authors.initials: JF
authors.lastname: Santos
authors.affiliation: Department of Geosciences and GeoBioTec, University of Aveiro, 3810-193, Aveiro, Portugal.
authors.forename: Carla
authors.initials: C
authors.lastname: Patinha
authors.affiliation: Department of Geosciences and GeoBioTec, University of Aveiro, 3810-193, Aveiro, Portugal.
authors.forename: Eduardo Ferreira
authors.initials: EF
authors.lastname: da Silva
authors.affiliation: Department of Chemistry and CICECO, University of Aveiro, 3810-193, Aveiro, Portugal.
authors.forename: Rosário
authors.initials: R
authors.lastname: Soares
authors.affiliation: Department of Chemistry and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
authors.forename: Armando C
authors.initials: AC
authors.lastname: Duarte
mesh_terms: D000336:Aerosols / Q000032:analysis*; D000393:Air Pollutants / Q000032:analysis*; D002244:Carbon / Q000032:analysis; D002947:Cities; D004784:Environmental Monitoring; D052638:Particulate Matter; D011174:Portugal; D013325:Strontium Isotopes / Q000032:analysis*
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D052638:Particulate Matter; D013325:Strontium Isotopes; D002244:Carbon
keywords: Carbonaceous aerosols; Minerals; PM2.5; Source identification; Sr isotope; Water-soluble inorganic ions; Western European Coast