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| Titel |
Technical Note: A new coupled system for global-to-regional downscaling of CO2 concentration estimation |
| VerfasserIn |
K. Trusilova, C. Rödenbeck, C. Gerbig, M. Heimann |
| 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 ; 10, no. 7 ; Nr. 10, no. 7 (2010-04-01), S.3205-3213 |
| Datensatznummer |
250008324
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| Publikation (Nr.) |
 copernicus.org/acp-10-3205-2010.pdf |
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| Zusammenfassung |
| We introduce a global-to-regional nesting scheme for atmospheric transport
models used in simulating concentrations of green house gases from globally
distributed surface fluxes. The coupled system of the regional Stochastic
Time-Inverted Lagrangian Transport (STILT) model and the global atmospheric
transport model (TM3) is designed to resolve atmospheric trace gas
concentrations at high temporal and spatial resolutions in a specified
domain e.g. for regional inverse applications. The nesting technique used
for the coupling is based on a decomposition of the atmospheric
concentration signal into a far-field and a near-field contribution enabling
the usage of different model types for global (Eulerian) and regional
(Lagrangian) scales. For illustrating the performance of the coupled
TM3-STILT system we compare simulated mixing ratios of carbon dioxide with
available observations at 10 sites in Europe. For all chosen sites the
TM3-STILT provided higher correlations between the modelled and the measured
time series than the TM3 global model. Autocorrelation analysis demonstrated
that the TM3-STILT model captured temporal variability of measured tracer
concentrations better than TM3 at most sites. |
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