Relative contribution and origin of Black Carbon during a high concentration winter episode in Madrid
- Autores: M. Becerril, Esther Coz Diego, André S. H. Prévôt, Begoña Artiñano Rodríguez de Torres
- Localización: 2nd Iberian Meeting on Aerosol Science and Technology: Proceedings Book RICTA 2014 / coord. por Jordi Grifoll Taverna, Joan Rosell Llompart, 2014, ISBN 978-84-695-9978-5, págs. 139-144
- Idioma: inglés
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Resumen
Black carbon (BC) is one of the most important of the atmospheric aerosol chemical components in urban environments. In Madrid, BC observations are rather limited on BC patterns under pollution episode scenarios. Therefore, BC monitoring has become a pending goal to be accomplished for this city.
The present study focuses on the evolution, significance, and source apportionment of the BC concentrations at an urban background station in Madrid measured by aerosol light absorption techniques. During the period of study presented in this work, the meteorological situation was characterized by three scenarios: a local episode and two long range transport events, one from North African origin and other from the North Atlantic.
PM2.5 BC hourly average concentrations ranged from 0.10 ± 0.03 μg/m3 to 19 ± 4 μg/m3, being the highest during the local episode and the lowest during the transport of Atlantic origin. The contribution of BC represented 36 ± 19 % of the total chemical species monitored at the site (BC, inorganic and organic compounds), being maximum during the local episode with 52 ± 15 %. This first BC apportionment study suggests that BC sources in Madrid are mostly of fossil fuel origin, especially during daytime.
