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| Titel |
Marine N inventory sensitivity to atmospheric N deposition |
| VerfasserIn |
Angela Landolfi, Chris Somes, Lauren Zamora, Wolfgang Koeve, Andreas Oschlies |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250112488
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| Publikation (Nr.) |
 EGU/EGU2015-12648.pdf |
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| Zusammenfassung |
| The marine inventory of fixed nitrogen (N), an essential nutrient controlling productivity, is
determined by the balance between N2 fixation by cyanobacteria and N-loss via
microbially-mediated processes under low oxygen conditions. Human-driven perturbations of
ocean temperature and atmospheric N deposition impact on the magnitude of N-loss and
N-gain with potential effects on oceanic N2O emissions. However, the timescale and the net
effect of these changes on the N inventory is not known. This is particularly so since the
degree of coupling between the major source and sink of N is debated and the sign of the
feedbacks among these two opposite processes is not well defined. Here we use a global
biogeochemical model to investigate how projected changes in ocean warming and
atmospheric N deposition may impact the marine N inventory and affect future N2O
emissions. |
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