Evaluating the Performance of a Regional-Scale Photochemical Modelling System: Part I Ozone Predictions


Autoria(s): Arasa Agudo, Raúl; Soler i Duffour, M. Rosa; Olid García, Miriam
Contribuinte(s)

Universitat de Barcelona

Resumo

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.

Identificador

http://hdl.handle.net/2445/48693

Idioma(s)

eng

Publicador

Hindawi Publishing Corporation

Direitos

cc-by (c) Arasa Agudo, Raúl et al., 2012

info:eu-repo/semantics/openAccess

<a href="http://creativecommons.org/licenses/by/3.0/es">http://creativecommons.org/licenses/by/3.0/es</a>

Palavras-Chave #Ozó atmosfèric #Qualitat de l'aire #Física atmosfèrica #Troposfera #Atmospheric ozone #Air quality #Atmospheric physics #Troposphere
Tipo

info:eu-repo/semantics/article

info:eu-repo/semantics/publishedVersion