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| Titel |
Evaluation of new flux attribution methods for mapping N2O emissions at the landscape scale from EC measurements |
| VerfasserIn |
Agnes Grossel, Jordan Bureau, Benjamin Loubet, Patricia Laville, Raia Massad, Edwin Haas, Klaus Butterbach-Bahl, Christophe Guimbaud, Catherine Hénault |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250150828
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| Publikation (Nr.) |
 EGU/EGU2017-15339.pdf |
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| Zusammenfassung |
| The objective of this study was to develop and evaluate an attribution method based on a
combination of Eddy Covariance (EC) and chamber measurements to map N2O emissions
over a 3-km2 area of croplands and forests in France. During 2 months of spring
2015, N2O fluxes were measured (i) by EC at 15 m height and (ii) punctually with a
mobile chamber at 16 places within 1-km of EC mast. The attribution method was
based on coupling the EC measurements, information on footprints (Loubet et al.,
20101)
and emission ratios based on crops and fertilizations, calculated based on chamber
measurements. The results were evaluated against an independent flux dataset measured by
automatic chambers in a wheat field within the area. At the landscape scale, the method
estimated a total emission of 114-271 kg N-N2O during the campaign. This new approach
allowed estimating continuously N2O emission and better accounting for the spatial
variability of N2O emission at the landscape scale. |
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