Source apportionment of ambient PM2.5 in Santiago, Chile: 1999 and 2004 results

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dc.contributor.authorJorquera, Hector
dc.contributor.authorBarraza, Francisco
dc.date.accessioned2024-01-10T14:21:42Z
dc.date.available2024-01-10T14:21:42Z
dc.date.issued2012
dc.description.abstractA receptor model analysis has been applied to ambient PM2.5 measurements taken at Santiago, Chile (33.5 degrees S, 70.7 degrees W) in 2004 (117 samples) and in 1999 (95 samples) on a receptor site on the eastern side of the city. For both campaigns, six sources have been identified at Santiago and their contributions in 1999/2004 are: motor vehicles: 28 +/- 2.5/31.2 +/- 3.4%, wood burning: 24.8 +/- 2.3/28.9 +/- 3.3%, sulfates: 18.8 +/- 1.7/16.2 +/- 2.5%, marine aerosol: 13 +/- 2.1/9.9 +/- 1.5%, copper smelters: 11.5 +/- 1.4/9.7 +/- 3.3% and soil dust: 3.9 +/- 1.5/4.0 +/- 2.4%. Hence relative contributions are statistically the same but the absolute contributions have been reduced because ambient PM2.5 has decreased from 34.2 to 25.1 mu g/m(3) between 1999 and 2004 at Santiago. Similarity of results for both data sets - analyzed with different techniques at different laboratory facilities - shows that the analysis performed here is robust.
dc.description.abstractSource identification was carried out by inspection of key species in source profiles, seasonality of source contributions, comparison with published source profiles and by looking at wind trajectories computed using the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) from USA's National Oceanic and Atmospheric Administration (NOAA); for the wood burning sources the MODIS burned area daily product was used to confirm wildfire events along the year. Using this combined methodology we have shown conclusively that: a) marine air masses do reach Santiago's basin in significant amounts but combined with anthropogenic sources; b) all copper smelters surrounding Santiago - and perhaps coal-fired power plants as well - contribute to ambient PM2.5; c) wood burning is the second largest source, coming from residential wood burning in fall and winter and from regional wildfires in spring and summer.
dc.description.abstractThe results of the present analysis can be used to improve emission inventories, air quality forecasting systems and cost-benefit analyses at local and regional scales. (C) 2012 Elsevier B.V. All rights reserved.
dc.description.funderFondecyt
dc.description.funderCONICYT
dc.fechaingreso.objetodigital09-04-2024
dc.format.extent12 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.scitotenv.2012.07.049
dc.identifier.eissn1879-1026
dc.identifier.issn0048-9697
dc.identifier.pubmedidMEDLINE:22878102
dc.identifier.urihttps://doi.org/10.1016/j.scitotenv.2012.07.049
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/79756
dc.identifier.wosidWOS:000310396100048
dc.information.autorucIngeniería;Barraza F ;S/I;132241
dc.information.autorucIngeniería;Jorquera H ;S/I;100302
dc.language.isoen
dc.nota.accesoContenido parcial
dc.pagina.final429
dc.pagina.inicio418
dc.publisherELSEVIER SCIENCE BV
dc.revistaSCIENCE OF THE TOTAL ENVIRONMENT
dc.rightsacceso restringido
dc.subjectSource apportionment
dc.subjectFine particulate matter
dc.subjectRegional sources
dc.subjectSoil dust
dc.subjectCopper smelters
dc.subjectWood burning
dc.subjectPOSITIVE MATRIX FACTORIZATION
dc.subjectPARTICULATE MATTER
dc.subjectAIR-POLLUTION
dc.subjectCOASTAL LOWS
dc.subjectPM10
dc.subjectTRENDS
dc.subjectAEROSOL
dc.subjectVARIABILITY
dc.subjectCEILOMETER
dc.subjectDISPERSION
dc.subject.ods13 Climate Action
dc.subject.ods11 Sustainable Cities and Communities
dc.subject.odspa13 Acción por el clima
dc.subject.odspa11 Ciudades y comunidades sostenibles
dc.titleSource apportionment of ambient PM2.5 in Santiago, Chile: 1999 and 2004 results
dc.typeartículo
dc.volumen435
sipa.codpersvinculados132241
sipa.codpersvinculados100302
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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