Articles | Volume 12, issue 1
Ocean Sci., 12, 153–167, 2016
https://doi.org/10.5194/os-12-153-2016
Ocean Sci., 12, 153–167, 2016
https://doi.org/10.5194/os-12-153-2016

Research article 18 Jan 2016

Research article | 18 Jan 2016

The flow field of the upper hypoxic eastern tropical North Atlantic oxygen minimum zone

L. Stramma et al.

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Cited articles

Banyte, D., Tanhua, T., Visbeck, M., Wallace, D. W. R., Karstensen, J., Krahmann, G., Schneider, A., Stramma, L., and Dengler, M.: Diapycnal diffusivity at the upper boundary of the tropical North Atlantic oxygen minimum zone, J. Geophys. Res., 117, C09016, https://doi.org/10.1029/2011JC007762, 2012.
Banyte, D., Visbeck, M., Tanhua, T., Fischer, T., Krahmann, G., and Karstensen, J.: Lateral diffusivities from tracer release experiments in the tropical North Atlantic thermocline, J. Geophys. Res., 118, 1–15, 2013.
Boyer, T. P., Antonov, J. I., Baranova, O. K., Garcia, H. E., Johnson, D. R., Locarnini, R. A., Mishonov, A. V. Seidov. D., Amolyar, I. V., and Zweng, M. M.: World Ocean Database 2009 [DVDs], Noaa Atlas Nesdis, vol. 66, edited by: S. Levitus, US Govt. Print. Off., Washington, DC USA, 216 pp., 2009.
Brandt, P., Hormann, V., Körtzinger, A., Visbeck, M., Krahmann, G., Stramma, L., Lumpkin, R., and Schmid, C.: Changes in the ventilation of the oxygen minimum zone of the tropical North Atlantic, J. Phys. Oceanogr., 40, 1784–1801, https://doi.org/10.1175/2010JPO4301.1, 2010.
Brandt, P., Bange, H. W., Banyte, D., Dengler, M., Didwischus, S.-H., Fischer, T., Greatbatch, R. J., Hahn, J., Kanzow, T., Karstensen, J., Körtzinger, A., Krahmann, G., Schmidtko, S., Stramma, L., Tanhua, T., and Visbeck, M.: On the role of circulation and mixing in the ventilation of oxygen minimum zones with a focus on the eastern tropical North Atlantic, Biogeosciences, 12, 489-512, https://doi.org/10.5194/bg-12-489-2015, 2015.
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Short summary
The subsurface circulation in the eastern tropical North Atlantic OMZ is derived from velocity, float and tracer data and data assimilation results, and shows a cyclonic flow around the Guinea Dome reaching into the oxygen minimum zone. The stronger cyclonic flow around the Guinea Dome in 2009 seem to be connected to a strong Atlantic Meridional Mode (AMM) event. A continuous deoxygenation trend of the low oxygen layer was confirmed. Eddy influence is weak south of the Cape Verde Islands.