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| Titel |
Mesoscale circulations over complex terrain in the Valencia coastal region, Spain – Part 2: Modeling CO2 transport using idealized surface fluxes |
| VerfasserIn |
G. Pérez-Landa, P. Ciais, G. Gangoiti, J. L. Palau, A. Carrara, B. Gioli, F. Miglietta, M. Schumacher, M. M. Millán, M. J. Sanz |
| 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 ; 7, no. 7 ; Nr. 7, no. 7 (2007-04-16), S.1851-1868 |
| Datensatznummer |
250004884
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| Publikation (Nr.) |
 copernicus.org/acp-7-1851-2007.pdf |
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| Zusammenfassung |
| Vertical profiles of CO2 concentration were collected during an
intensive summer campaign in a coastal complex-terrain region within the
frame of the European Project RECAB (Regional Assessment and Modelling of
the Carbon Balance in Europe). The region presents marked diurnal mesoscale
circulation patterns. These circulations result in a specific coupling
between atmospherically transported CO2 and its surface fluxes. To
understand the effects of this interaction on the spatial variability of the
observed CO2 concentrations, we applied a high-resolution transport
simulation to an idealized model of land biotic fluxes. The regional Net
Ecosystem Exchange fluxes were extrapolated for different land-use classes
by using a set of eddy-covariance measurements. The atmospheric transport
model is a Lagrangian particle dispersion model, driven by a simulation of
the RAMS mesoscale model. Our simulations were able to successfully
reproduce some of the processes controlling the mesoscale transport of
CO2. A semi-quantitative comparison between simulations and data
allowed us to characterize how the coupling between mesoscale transport and
surface fluxes produced CO2 spatial gradients in the domain. Temporal
averages in the simulated CO2 field show a covariance between flux and
transport consisting of: 1) horizontally, a CO2 deficit over land,
mirrored by a CO2 excess over the sea and 2) vertically, the prevalence
of a mean CO2 depletion between 500 and 2000 m, and a permanent
build-up of CO2 in the lower levels. |
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