title: Analyzing SO2 concentrations and wind directions during a short monitoring campaign at a site far from the industrial pole of La Plata, Argentina.
abstract: This article presents and discusses SO2 air quality concentrations (ppbv) together with wind velocities and directions measurements carried out between September 1st and December 21st 2005 at a site located 8.5 km away from the Industrial Pole of La Plata area. As the city and its surroundings have no official monitoring network, the current work enlarges the air quality information available from the zone and sets some initial considerations to the future siting of monitoring stations. The statistical analysis of the data was performed using techniques of tests for outliers and trends, dissimilarity measures and robust regression. In relation to SO2 concentrations, low values were found during this short campaign considering daily averages (with a maximum of 8.5 ppbv) and hourly averages (with a maximum of 25.9 ppbv); World Health Organization guidelines were never surpassed. Nevertheless, a strong dependence between wind directions carrying air pollutants from the Industrial Pole and hourly concentration peaks were found. Due to low monthly SO2 concentrations and because a decreasing time trend was found, the authors propose, as an example, the implementation of an alternative discontinuous method to the continuous analyzer used in the current campaign. Our results state that sampling every 7 days at 13:00-13:59 hours (local time) would be enough to get representative values of the air quality. As a general remark it is possible to highlight that longer and systematic studies should be encouraged to confirm the seasonal wind pattern and to evaluate the air quality.
authors.affiliation: CIOp (Centro de Investigaciones Opticas), CC 124, 1900 La Plata, Argentina. gustavratto@gmail.com
authors.forename: Gustavo
authors.initials: G
authors.lastname: Ratto
authors.forename: Fabian
authors.initials: F
authors.lastname: Videla
authors.forename: Ricardo
authors.initials: R
authors.lastname: Maronna
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D001118:Argentina; D002947:Cities; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods; D006801:Humans; D007220:Industrial Waste; D007221:Industry; D013458:Sulfur Dioxide / Q000032:analysis*; D014919:Wind
chemical_list: D000393:Air Pollutants; D007220:Industrial Waste; D013458:Sulfur Dioxide