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| Titel |
A process-based simulation of the marine nitrous oxide cycle |
| VerfasserIn |
P. Suntharalingam, E. Buitenhuis, C. LeQuéré, G. Förster |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250028271
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| Zusammenfassung |
| Model formulations of the marine nitrous oxide cycle in the oxygenated open ocean
commonly parameterize N2O production during remineralization of organic matter using the
widespread observed correlations between excess N2O (ÎN2O) and Apparent Oxygen
Utilization (AOU). However, marine geochemical quantities such as ÎN2O and AOU also
reflect the effects of water mass mixing and insufficient equilibration at the ocean surface.
Parameterizations derived from present day observations, therefore, may be less effective in
predictive modelling of the marine N2O source under future scenarios of climate change.
Here we present a process-based approach to simulation of the marine N2O cycle. We base
our representation on a model of the nitrogen cycle within the PlankTOM5 ocean
biogeochemistry model and explicitly simulate N2O production and consumption
during processes of nitrification and denitrification. We will present initial model
results, evaluation against observations from different biogeogeochemical provinces,
and comparison with previous approaches to simulation of the marine N2O cycle. |
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