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| Titel |
PM10 data assimilation over Europe with the optimal interpolation method |
| VerfasserIn |
M. Tombette, V. Mallet, B. Sportisse |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 9, no. 1 ; Nr. 9, no. 1 (2009-01-07), S.57-70 |
| Datensatznummer |
250006629
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| Publikation (Nr.) |
 copernicus.org/acp-9-57-2009.pdf |
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| Zusammenfassung |
| This paper presents experiments of PM10 data assimilation with the
optimal interpolation method. The observations are provided by BDQA (Base de
Données sur la Qualité de l'Air), whose monitoring network covers
France. Two other databases (EMEP and AirBase) are used to evaluate the
improvements in the analyzed state over January 2001 and for several outputs
(PM10, PM2.5 and chemical composition). The method is then applied in
operational-forecast conditions. It is found that the assimilation of
PM10 observations significantly improves the one-day forecast of total
mass (PM10 and PM2.5), whereas the improvement is non significant for
the two-day forecast. The errors on aerosol chemical composition are
sometimes amplified by the assimilation procedure, which shows the need for
chemical data. Since the observations cover a limited part of the domain
(France versus Europe) and since the method used for assimilation is
sequential, we focus on the horizontal and temporal impacts of the
assimilation and we study how several parameters of the assimilation system
modify these impacts. The strategy followed in this paper, with the optimal
interpolation, could be useful for operational forecasts. Meanwhile,
considering the weak temporal impact of the approach (about one day), the
method has to be improved or other methods have to be considered. |
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