title: Impact of medium-distance pollution sources in a Galician suburban site (NW Iberian peninsula).
abstract: This work studies airborne quality in a geographical area that has not been investigated broadly: a suburban site nearby A Coruña (Galicia, NW Iberian Peninsula). In contrast to major Spanish cities, the site has Atlantic characteristics: rainy, scarce calm weather and infrequent prolonged sunny periods. The relationships between several gaseous pollutants (NO, NO2, NOx, CO, O3, PM10, PM2.5 and PM1) and their temporal trends (daily, monthly and seasonal) were evaluated. The aim was to unravel whether medium- and long-distance sources were impacting upon the site. Univariate studies focused on factorizing the pollutants according to a codifying factor (wind direction, hour of the day, season and month). Multivariate studies (Varimax-rotated factorial analysis) were done separately on both weekdays and weekends. The intensity of the daily maxima for NO, NO2, NOx and CO was lower during the weekends, with O3 behaving opposite. PM average values agreed with previous historical reports for a rural background station relatively close to the site and they decreased daily between 11:00 and 19:00 h, likely because of the marine breeze. With moderate wind speeds the pollutants were associated to medium-distance pollution sources, mainly the city of A Coruña and a combination of industrial pollution sources (a power plant, a solid waste incinerator and a regional airport).
authors.affiliation: Grupo Química Analítica Aplicada (QANAP), Instituto Universitario de Medio Ambiente (IUMA), Departamento de Química Analítica, Facultade de Ciencias, Universidade da Coruña, Campus de A Coruña, 15071 A Coruña, Spain.
authors.forename: M P
authors.initials: MP
authors.lastname: Gómez-Carracedo
authors.affiliation: Grupo Química Analítica Aplicada (QANAP), Instituto Universitario de Medio Ambiente (IUMA), Departamento de Química Analítica, Facultade de Ciencias, Universidade da Coruña, Campus de A Coruña, 15071 A Coruña, Spain. Electronic address: andrade@udc.es.
authors.forename: J M
authors.initials: JM
authors.lastname: Andrade
authors.affiliation: Milano Chemometrics and QSAR Research Group, Department of Environmental and Earth Sciences, University of Milano-Bicocca, P.za della Scienza, 1-20126 Milano, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Ballabio
authors.affiliation: Grupo Química Analítica Aplicada (QANAP), Instituto Universitario de Medio Ambiente (IUMA), Departamento de Química Analítica, Facultade de Ciencias, Universidade da Coruña, Campus de A Coruña, 15071 A Coruña, Spain.
authors.forename: D
authors.initials: D
authors.lastname: Prada-Rodríguez
authors.affiliation: Grupo Química Analítica Aplicada (QANAP), Instituto Universitario de Medio Ambiente (IUMA), Departamento de Química Analítica, Facultade de Ciencias, Universidade da Coruña, Campus de A Coruña, 15071 A Coruña, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Muniategui-Lorenzo
authors.affiliation: Milano Chemometrics and QSAR Research Group, Department of Environmental and Earth Sciences, University of Milano-Bicocca, P.za della Scienza, 1-20126 Milano, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Consonni
authors.affiliation: Grupo Química Analítica Aplicada (QANAP), Instituto Universitario de Medio Ambiente (IUMA), Departamento de Química Analítica, Facultade de Ciencias, Universidade da Coruña, Campus de A Coruña, 15071 A Coruña, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Piñeiro-Iglesias
authors.affiliation: Grupo Química Analítica Aplicada (QANAP), Instituto Universitario de Medio Ambiente (IUMA), Departamento de Química Analítica, Facultade de Ciencias, Universidade da Coruña, Campus de A Coruña, 15071 A Coruña, Spain.
authors.forename: P
authors.initials: P
authors.lastname: López-Mahía
mesh_terms: D002947:Cities / Q000706:statistics & numerical data; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis*; D004787:Environmental Pollution / Q000706:statistics & numerical data*; D013030:Spain
chemical_list: D004785:Environmental Pollutants
keywords: Factor analysis; Gaseous pollutants; Nitrogen oxides; Ozone; Particulate matter