Articles | Volume 13, issue 20
Biogeosciences, 13, 5865–5881, 2016

Special issue: Hydrography, biogeochemistry, and biology of "dead-zone eddies"...

Biogeosciences, 13, 5865–5881, 2016

Research article 28 Oct 2016

Research article | 28 Oct 2016

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

Florian Schütte et al.

Data sets

Characterization of dead-zone eddies in the tropical Northeast Atlantic F. Sch\"{u}tte, J. Karstensen, G. Krahmann, H. Hauss, B. Fiedler, P. Brandt, and M. Visbeck

Remote Sensing Systems, Microwave-Infrared optimal interpolated Sea Surface Temperature REMSS

National Aeronautics and Space Administration, Modis Aqua Level 3 Chlorophyll NASA

Argo float data Argo Data Management Team

Copernicus Marine and Environment Monitoring Service, Sea Level Anomaly CMEMS

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.
Final-revised paper