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

Sensitivity of the oxygen levels to the CORE-II and JRA55 forcing dataset in a high resolution model of the tropical Atlantic Ocean

Not scheduled
Audimax | Kiel University

Audimax | Kiel University

Christian-Albrechts-Platz 2 | 24118 Kiel | GERMANY
Poster 03 Ventilation and Oxygen Supply


Christina Roth


Along the eastern boundaries of the eastern tropical Atlantic (ETA), intense oxygen minimum zones (OMZs) at intermediate depth result from the large remineralization of organic matter and the weak interior ventilation. The ETA is ventilated in the upper thermocline by the equatorial undercurrent (EUC). A part of the water transported by the EUC originate from the oxygen-rich subtropical regions, where subduction processes occur. The connection between subtropics and tropics is effectuated by wind driven shallow circulation cells, called subtropical-tropical cells (STC). To quantify the importance of the oxygen supply (in particular by the EUC and the STC) and the biological consumption, we perform simulations using an eddy resolving (1/10°) ocean model, embedded by a two-way nesting approach in a global coarse resolution model and coupled to a previously calibrated biogeochemical model that simulates phosphorus, oxygen, and nitrogen fluxes (MOPS-1.0). We perform two inter-decadal (1948 – 2007) experiments using two different atmospheric forcing data sets, CORE-II and JRA55-do. We show that the strength of the wind stress has a significant impact on the ocean circulation, the respiration rate and ultimately the oxygen levels.

Christina Roth, Olaf Duteil, Iris Kriest

Email Address croth@geomar.de
Position Senior Scientist
Affiliation GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Are you a SFB 754 / Future Ocean member? Yes

Primary authors

Christina Roth Dr Olaf Duteil (GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany) Dr Iris Kriest (GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany)

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