Articles | Volume 12, issue 2
https://doi.org/10.5194/bg-12-489-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/bg-12-489-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
27 Jan 2015
Research article |
| 27 Jan 2015
On the role of circulation and mixing in the ventilation of oxygen minimum zones with a focus on the eastern tropical North Atlantic
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
H. W. Bange
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
D. Banyte
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
M. Dengler
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
S.-H. Didwischus
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
T. Fischer
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
R. J. Greatbatch
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
T. Kanzow
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
now at: Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany
J. Karstensen
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
A. Körtzinger
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
G. Krahmann
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
S. Schmidtko
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
L. Stramma
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
T. Tanhua
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
M. Visbeck
GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Kiel, Germany
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Latest update: 04 Dec 2025
Short summary
Our observational study looks at the structure of the eastern tropical North Atlantic (ETNA) oxygen minimum zone (OMZ) in comparison with the less-ventilated, eastern tropical South Pacific OMZ. We quantify the OMZ’s oxygen budget composed of consumption, advection, lateral and vertical mixing. Substantial oxygen variability is observed on interannual to multidecadal timescales. The deoxygenation of the ETNA OMZ during the last decades represents a substantial imbalance of the oxygen budget.
Our observational study looks at the structure of the eastern tropical North Atlantic (ETNA)...
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