Title: The challenge of improving urban air quality: effects of hybrid cars, introduction in Barcelona and Madrid (Spain)

Authors: M. Gonçalves; P. Jiménez-Guerrero; J.M. Baldasano

Addresses: Environmental Modelling Laboratory, Technical University of Catalonia, C. Colom, 11, 08222 Terrassa, Spain; Barcelona Supercomputing Center - Centro Nacional de Supercomputación, Earth Sciences Department, Edif. Nexus II. C, Jordi Girona, 29. 08034 Barcelona, Spain ' Physics of the Earth, University of Murcia. Ed. CIOyN, Campus de Espinardo, 30100 Murcia, Spain ' Environmental Modelling Laboratory, Technical University of Catalonia, C. Colom, 11, 08222 Terrassa, Spain; Barcelona Supercomputing Center - Centro Nacional de Supercomputación, Earth Sciences Department, Edif. Nexus II. C, Jordi Girona, 29. 08034 Barcelona, Spain

Abstract: WRF-ARW/HERMES/CMAQ modelling system is applied with high resolution (1 km², 1 h) to assess changes in Madrid and Barcelona (Spain) air quality due to hybrid cars introduction. The substitution of the oldest cars by hybrids is effective to reduce NO2 and PM2.5 levels in the conurbations (up to 35%/12% in Madrid downtown, when 30% of cars are changed). In VOC-limited areas, as Barcelona, the NOx emissions abatement locally increases tropospheric ozone concentration. Downwind, however, the precursors' emissions reduction leads to lower O3 levels. Air quality models, applied with high resolution, prove to be useful tools to manage urban air quality.

Keywords: urban air quality; on-road traffic emissions; atmospheric modelling; environmental management; dispersion modelling; air pollution; Spain.

DOI: 10.1504/IJEP.2011.047327

International Journal of Environment and Pollution, 2011 Vol.47 No.1/2/3/4, pp.70 - 78

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 11 Jun 2012 *

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