3-7 September 2018
Audimax | Kiel University
Europe/Berlin timezone

The Influence of mixing on N2O production in the coastal waters off Peru

Not scheduled
Audimax | Kiel University

Audimax | Kiel University

Christian-Albrechts-Platz 2 | 24118 Kiel | GERMANY
Poster 10 Biogeochemical Cycles: Feedbacks and Interactions


Dr Annette Kock (GEOMAR Helmholtz Centre for Ocean Research Kiel)


The Peruvian upwelling area is known as an area of high N2O emissions. While oxygen-free waters of the OMZ core are depleted in N2O, extremely high production is triggered within the sharp gradients of the oxycline in the coastal waters off Peru, and mixing and upwelling processes can effectively transport these waters with extreme N2O supersaturations towards the surface. This turns the Peruvian upwelling into the most important ocean area for N2O emissions which accounts for about 25% of the global oceanic N2O emissions alone.

Here we investigate the effect of mixing between oxygenated surface waters with waters from the OMZ core on N2O production in a series of incubation experiments with different mixing conditions using GC-ECD and 15N tracer incubations. N2O production was triggered when water from the OMZ was mixed with oxygenated surface waters.

Affiliation GEOMAR Helmholtz Centre for Ocean Research Kiel
Email Address akock@geomar.de
Are you a SFB 754 / Future Ocean member? Yes
Position Postdoc

Primary authors

Dr Annette Kock (GEOMAR Helmholtz Centre for Ocean Research Kiel) Claudia Frey (University of Basel) Damian L. Arévalo-Martínez Ms Mingshuang Sun (GEOMAR Helmholtz Centre for Ocean Research Kiel) Hermann W. Bange

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