Sulfate, nitrate and chloride in PM10 in the city of San José, Costa Rica: 2004-2006
The analysis of PM10 levels in two sites of the city of San José (Catedral Metropolitana and Junta de Educación), in a period of 2.5 years (April 2004-October 2006), reported a median of 39 ± 8 and 27 ± 8 ¿g m-3, respectively. In addition, SO42-, NO3- and Cl- levels were measured in both areas, wher...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2010 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:56514433006 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=56514433006 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias de la Tierra San José Costa Rica inorganic anions Atmospheric aerosols |
| Sumario: | The analysis of PM10 levels in two sites of the city of San José (Catedral Metropolitana and Junta de Educación), in a period of 2.5 years (April 2004-October 2006), reported a median of 39 ± 8 and 27 ± 8 ¿g m-3, respectively. In addition, SO42-, NO3- and Cl- levels were measured in both areas, where annual averages resulted not significantly different between each other. The analysis of main components, applied to the collected data, reveals a 65% of total variance explained by two factors. The PC1 correlates Cl- concentration and wind speed, indicating a marine contribution to this ion. The PC2 shows a relation between SO42-, NO3- and PM10 levels, demonstrating its anthropogenic origin. |
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