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| Titel |
Mesoscale inversion: first results from the CERES campaign with synthetic data |
| VerfasserIn |
T. Lauvaux, M. Uliasz, C. Sarrat, F. Chevallier, P. Bousquet, C. Lac, K. J. Davis, P. Ciais, A. S. Denning, P. J. Rayner |
| 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 ; 8, no. 13 ; Nr. 8, no. 13 (2008-07-02), S.3459-3471 |
| Datensatznummer |
250006265
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| Publikation (Nr.) |
 copernicus.org/acp-8-3459-2008.pdf |
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| Zusammenfassung |
| We investigate the
ability of a mesoscale model to reconstruct CO2 fluxes at
regional scale. Formally, we estimate the reduction of error for a
CO2 flux inversion at 8 km resolution in the South West
of France, during four days of the CarboEurope Regional Experiment Strategy
(CERES) in spring 2005. Measurements from two towers and two airplanes
are available for this campaign. The lagrangian particle dispersion
model LPDM was coupled to the non-hydrostatic model Meso-NH and
integrated in a matrix inversion framework. Impacts of aircraft and
tower measurements are quantified separately and together. We find
that the configuration with both towers and aircraft is able to
significantly reduce uncertainties on the 4-day averaged CO2
fluxes over about half of the 300×300 km2 domain. Most
of this reduction comes from the tower measurements, even though the
impact of aircraft measurements remains noticeable. Imperfect knowledge
of boundary conditions does not significantly impact the error
reduction for surface fluxes. We test alternative strategies
to improve the impact of aircraft measurements and find that most
information comes from measurements inside the boundary layer. We
find that there would be a large improvement in error reduction if we
could improve our ability to model nocturnal concentrations at tower
sites. |
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