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Título:	Evaluating the Performance of a Regional-Scale Photochemical Modelling System: Part I Ozone Predictions
Autor/a:	Arasa Agudo, Raúl; Soler i Duffour, M. Rosa; Olid García, Miriam
Otros autores:	Universitat de Barcelona
Abstract:	We present a detailed evaluation of the seasonal performance of the Community Multiscale Air Quality (CMAQ) modelling system and the PSU/NCAR meteorological model coupled to a new Numerical Emission Model for Air Quality (MNEQA). The combined system simulates air quality at a fine resolution (3 km as horizontal resolution and 1 h as temporal resolution) in north-eastern Spain, where problems of ozone pollution are frequent. An extensive database compiled over two periods, from May to September 2009 and 2010, is used to evaluate meteorological simulations and chemical outputs. Our results indicate that the model accurately reproduces hourly and 1-h and 8-h maximum ozone surface concentrations measured at the air quality stations, as statistical values fall within the EPA and EU recommendations. However, to further improve forecast accuracy, three simple bias-adjustment techniques mean subtraction (MS), ratio adjustment (RA), and hybrid forecast (HF) based on 10 days of available comparisons are applied. The results show that the MS technique performed better than RA or HF, although all the bias-adjustment techniques significantly reduce the systematic errors in ozone forecasts.
Materia(s):	-Ozó atmosfèric -Qualitat de l'aire -Física atmosfèrica -Troposfera -Atmospheric ozone -Air quality -Atmospheric physics -Troposphere
Derechos:	cc-by (c) Arasa Agudo, Raúl et al., 2012 http://creativecommons.org/licenses/by/3.0/es
Tipo de documento:	Artículo Artículo - Versión publicada
Editor:	Hindawi Publishing Corporation
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