 |
| Titel |
Uncertainties in model predictions of nitrogen fluxes from agro-ecosystems in Europe |
| VerfasserIn |
J. Kros, G. B. M. Heuvelink, G. J. Reinds, J. P. Lesschen, V. Ioannidi, W. Vries |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 9, no. 11 ; Nr. 9, no. 11 (2012-11-20), S.4573-4588 |
| Datensatznummer |
250007397
|
| Publikation (Nr.) |
 copernicus.org/bg-9-4573-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| To assess the responses of nitrogen and greenhouse gas emissions to
pan-European changes in land cover, land management and climate, an
integrated dynamic model, INTEGRATOR, has been developed. This model
includes both simple process-based descriptions and empirical relationships
and uses detailed GIS-based environmental and farming data in combination
with various downscaling methods. This paper analyses the propagation of
uncertainties in model inputs and parameters to outputs of INTEGRATOR, using
a Monte Carlo analysis. Uncertain model inputs and parameters were
represented by probability distributions, while spatial correlation in these
uncertainties was taken into account by assigning correlation coefficients
at various spatial scales. The uncertainty propagation was analysed for the
emissions of NH3, N2O and NOx, N leaching to groundwater and
N runoff to surface water for the entire EU27 and for individual countries.
Results show large uncertainties for N leaching and runoff (relative errors
of ∼ 19% for Europe as a whole), and smaller uncertainties for
emission of N2O, NH3 and NOx (relative errors of ∼ 12%). Uncertainties for Europe as a whole were much smaller compared to
uncertainties at country level, because errors partly cancelled out due to
spatial aggregation. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|