A comparison of simulated and observed ozone mixing ratios for the summer of 1998 in Western Europe
Identifieur interne : 002596 ( Main/Exploration ); précédent : 002595; suivant : 002597A comparison of simulated and observed ozone mixing ratios for the summer of 1998 in Western Europe
Auteurs : H. Schmidt [France] ; C. Derognat [France] ; R. Vautard [France] ; M. Beekmann [France]Source :
- Atmospheric Environment [ 1352-2310 ] ; 2001.
Abstract
This study describes and evaluates the newly developed European scale Eulerian chemistry transport model CHIMERE-continental. The model is designed for seasonal simulations and real time forecasts without the use of super-computers. For the purpose of model evaluation simulated ozone mixing ratios for the period between 1 May 1998 and 30 September 1998 are compared to observational data from 115 European surface sites. In order to facilitate the interpretation of future forecasts a statistic is established to estimate the reliability of a simulated pollution level. Besides this, the comparison is done by means of time series, scatter plots, a spectral analysis and the calculation of RMS-errors and biases of the model results corresponding to each observation site. It turns out that the mean RMS-error of the simulated daily maximum ozone mixing ratio for the sites considered a priori as well suited for a model comparison is about 10ppb. For the same period but a reduced number of sites observed concentrations of NO2 and ethene are compared to simulated values. Difficulties encountered with the representativeness of observations when trying to evaluate a mesoscale air pollution model are discussed.
Url:
DOI: 10.1016/S1352-2310(01)00451-4
Affiliations:
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The model is designed for seasonal simulations and real time forecasts without the use of super-computers. For the purpose of model evaluation simulated ozone mixing ratios for the period between 1 May 1998 and 30 September 1998 are compared to observational data from 115 European surface sites. In order to facilitate the interpretation of future forecasts a statistic is established to estimate the reliability of a simulated pollution level. Besides this, the comparison is done by means of time series, scatter plots, a spectral analysis and the calculation of RMS-errors and biases of the model results corresponding to each observation site. It turns out that the mean RMS-error of the simulated daily maximum ozone mixing ratio for the sites considered a priori as well suited for a model comparison is about 10ppb. For the same period but a reduced number of sites observed concentrations of NO2 and ethene are compared to simulated values. Difficulties encountered with the representativeness of observations when trying to evaluate a mesoscale air pollution model are discussed.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Île-de-France</li></region><settlement><li>Palaiseau</li><li>Paris</li></settlement><orgName><li>Université Pierre-et-Marie-Curie</li></orgName></list><tree><country name="France"><noRegion><name sortKey="Schmidt, H" sort="Schmidt, H" uniqKey="Schmidt H" first="H." last="Schmidt">H. Schmidt</name></noRegion><name sortKey="Beekmann, M" sort="Beekmann, M" uniqKey="Beekmann M" first="M." last="Beekmann">M. Beekmann</name><name sortKey="Derognat, C" sort="Derognat, C" uniqKey="Derognat C" first="C." last="Derognat">C. Derognat</name><name sortKey="Schmidt, H" sort="Schmidt, H" uniqKey="Schmidt H" first="H." last="Schmidt">H. Schmidt</name><name sortKey="Vautard, R" sort="Vautard, R" uniqKey="Vautard R" first="R." last="Vautard">R. 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