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| Titel |
Estimating nitrogen fluxes at the European scale by upscaling INTEGRATOR model outputs from selected sites |
| VerfasserIn |
G. J. Reinds, G. B. M. Heuvelink, T. Hoogland, J. Kros, W. Vries |
| 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 ; 9, no. 11 ; Nr. 9, no. 11 (2012-11-16), S.4527-4536 |
| Datensatznummer |
250007394
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| Publikation (Nr.) |
 copernicus.org/bg-9-4527-2012.pdf |
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| Zusammenfassung |
| A comparison was made between upscaled model results of nitrogen (N) fluxes
to air and water from 450 sites within the EU-27 and results derived for the
entire EU-27 area using the model INTEGRATOR. The 450 sites were selected
using stratified random sampling, dividing the EU-27 into 150 strata and
selecting three sites at random within each stratum. The strata were based
on important environmental factors influencing N fluxes. Hierarchical
divisive cluster analysis was used to reduce the numerous combinations of
environmental factors to the required total of 150, such that the
heterogeneity of environmental factors within strata was as small as
possible. Modelled NH3, N2O and NOx emissions and N
leaching/runoff obtained were scaled up from the 450 sites to the entire
EU-27 and were within 10% of results obtained by running the model for the
whole of the EU-27 using about 36 500 sites. This implies that a reliable
estimate of N fluxes for EU-27 can be made by upscaling results of the 450
selected sites suggesting that dramatic reduction in computation time can be
achieved without substantial deterioration of results |
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