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| Titel |
Modelling regional scale surface fluxes, meteorology and CO2 mixing ratios for the Cabauw tower in the Netherlands |
| VerfasserIn |
L. F. Tolk, W. Peters, A. G. C. A. Meesters, M. Groenendijk, A. T. Vermeulen, G. J. Steeneveld, A. J. Dolman |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 6, no. 10 ; Nr. 6, no. 10 (2009-10-26), S.2265-2280 |
| Datensatznummer |
250004044
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| Publikation (Nr.) |
 copernicus.org/bg-6-2265-2009.pdf |
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| Zusammenfassung |
| We simulated meteorology and atmospheric CO2 transport over the
Netherlands with the mesoscale model RAMS-Leaf3 coupled to the biospheric
CO2 flux model 5PM. The results were compared with meteorological and
CO2 observations, with emphasis on the tall tower of Cabauw. An
analysis of the coupled exchange of energy, moisture and CO2 showed
that the surface fluxes in the domain strongly influenced the atmospheric
properties. The majority of the variability in the afternoon CO2 mixing
ratio in the middle of the domain was determined by biospheric and fossil
fuel CO2 fluxes in the limited area domain (640×640 km). Variation of
the surface CO2 fluxes, reflecting the uncertainty of the parameters in
the CO2 flux model 5PM, resulted in a range of simulated atmospheric
CO2 mixing ratios of on average 11.7 ppm in the well-mixed boundary
layer. Additionally, we found that observed surface energy fluxes and
observed atmospheric temperature and moisture could not be reconciled with
the simulations. Including this as an uncertainty in the simulation of
surface energy fluxes changed simulated atmospheric vertical mixing and
horizontal advection, leading to differences in simulated CO2 of on
average 1.7 ppm. This is an important source of uncertainty and should be
accounted for to avoid biased calculations of the CO2 mixing ratio, but
it does not overwhelm the signal in the CO2 mixing ratio due to the
uncertainty range of the surface CO2 fluxes. |
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