Browsing by Author "Barraza, Francisco"
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- ItemAnthropogenic Perturbations to the Atmospheric Molybdenum Cycle(2021) Wong, Michelle Y.; Rathod, Sagar D.; Marino, Roxanne; Li, Longlei; Lambert, Fabrice; Howarth, Robert W.; Alastuey, Andres; Alaimo,Maria Grazia; Barraza, Francisco; Castro Carneiro, Manuel
- ItemEvolution of air quality in Santiago : the role of mobility and lessons from the science-policy interface(2018) Gallardo, Laura; Barraza, Francisco; Ceballos, Andrés; Galleguillos, Mauricio; Huneeus, Nicolás; Lambert, Fabrice; Ibarra, Cecilia; Munizaga, Marcela A.; O'Ryan, Raúl E.; Osses, Mauricio; Tolvett, Sebastián; Urquiza, Anahí; Véliz, Karina D.
- ItemRelationship between Wildfire Smoke and Children’s Respiratory Health in the Metropolitan Cities of Central-Chile(2022) Ciciretti, Rebecca; Barraza, Francisco; Barrera, Francisco de la; Urquieta, Lorna; Cortés, Sandra; CEDEUS (Chile)
- ItemSource apportionment of ambient PM2.5 in Santiago, Chile: 1999 and 2004 results(ELSEVIER SCIENCE BV, 2012) Jorquera, Hector; Barraza, FranciscoA 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.