Articles | Volume 13, issue 20
https://doi.org/10.5194/bg-13-5865-2016
https://doi.org/10.5194/bg-13-5865-2016
Research article
 | 
28 Oct 2016
Research article |  | 28 Oct 2016

Characterization of “dead-zone” eddies in the eastern tropical North Atlantic

Florian Schütte, Johannes Karstensen, Gerd Krahmann, Helena Hauss, Björn Fiedler, Peter Brandt, Martin Visbeck, and Arne Körtzinger

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Short summary
Mesoscale eddies with very low–oxygen concentrations at shallow depth have been recently discovered in the eastern tropical North Atlantic. Our analysis shows that low oxygen eddies occur more frequent than expected and are found even close to the equator (8° N). From budget calculations we show that an oxygen reduction of 7 µmol/kg in the depth range of 50–150 m in the eastern tropical North Atlantic (peak reduction is 16 µmol/kg at 100 m depth) can be associated with the dispersion of these eddies.
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