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| Titel |
Inverse modeling of emissions for local photooxidant pollution: Testing a new methodology with kriging constraints |
| VerfasserIn |
I. Pison, L. Menut, N. Blond |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 24, no. 6 ; Nr. 24, no. 6 (2006-07-03), S.1523-1535 |
| Datensatznummer |
250015567
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| Publikation (Nr.) |
 copernicus.org/angeo-24-1523-2006.pdf |
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| Zusammenfassung |
| A new methodology for the inversion of anthropogenic emissions at a local
scale is tested. The inversion constraints are provided by a kriging
technique used in air quality forecast in the Paris area, which computes an
analyzed concentration field from network measurements and the first-guess
simulation of a CTM. The inverse developed here is based on the CHIMERE model
and its adjoint to perform 4-D integration. The methodology is validated on
synthetic cases inverting emission fluxes. It is shown that the
information provided by the analyzed concentrations is sufficient to reach a
mathematically acceptable solution to the optimization, even when little
information is available in the measurements. As compared to the use of
measurements alone or of measurements and a background matrix, the use of
kriging leads to a more homogeneous distribution of the corrections, both in
space and time. Moreover, it is then possible to double the accuracy of the
inversion by performing two kriging-optimization cycles. Nevertheless,
kriging analysis cannot compensate for a very important lack of information in
the measurements. |
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