Deoxygenation in the oxygen minimum zone of the eastern tropical North Atlantic.
Open accessAbstract
Observations and model results both indicate increasing oxygen minimum zones (OMZ) in the tropical oceans. Here we report on record low dissolved oxygen minimum concentrations in the eastern tropical North Atlantic in fall of 2008, with less than 40 μ mol kg−1 in the core of the OMZ. There we find a deoxygenation rate of ∼0.5 μ mol kg−1 a−1 during the last decades on two repeat sections at 7.5 and 11°N. The potential temperature and salinity in the surface and central water layers increased on both sections compared to previous observations. However, in contrast to the oxygen decrease in the core of the OMZ, increasing oxygen concentrations were observed in the central water layer above the OMZ. The observed deoxygenation was thus restricted to the core of the oxygen minimum layer. It remains unclear whether the vertical expansion of the oxygen minimum represents a long time trend or decadal variations.
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Based on oxygen observations from repeat ship sections in the OMZ of the eastern tropical North Atlantic for the recent decade (2006-2015), Hahn et al. (2017) suggested the existence of strong oxygen variations over this decade superimposed on the multi-decadal deoxygenation pattern.
“Based on oxygen observations from repeat ship sections in the OMZ of the eastern tropical North Atlantic for the recent decade (2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015), Hahn et al. (2017) suggested the existence of strong oxygen variations over this decade that are superimposed on the multi-decadal deoxygenation pattern (Stramma et al., 2009;Brandt et al., 2015;Santos et al., 2”
From The tropical atlantic observing system (2019) · cites this paper as Stramma et al., 2009
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Oxygen minimum zones in the eastern tropical Atlantic and Pacific oceans
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Brandt, P., Bange, H. W., Banyte, D., Dengler, M., Didwischus, S.-H., Fischer, T., Greatbatch, R. J., Hahn, J., Kanzow, T., Karstensen, J., et al. (2015) · Biogeosciences · doi:10.5194/bg-12-489-2015 · Cited by 180 · see citing works
Self-citationThe tropical atlantic observing system
Foltz, G. R., Brandt, P., Richter, I., Rodríguez-Fonseca, B., Hernandez, F., Dengler, M., Rodrigues, R. R., Schmidt, J. O., Yu, L., Lefevre, N., et al. (2019) · Frontiers in Marine Science · doi:10.3389/fmars.2019.00206 · Cited by 150 · see citing works
Self-citationOcean scale hypoxia-based habitat compression of Atlantic istiophorid billfishes
PRINCE, E. D., LUO, J., PHILLIP GOODYEAR, C., HOOLIHAN, J. P., SNODGRASS, D., ORBESEN, E. S., SERAFY, J. E., ORTIZ, M., & SCHIRRIPA, M. J. (2010) · Fisheries Oceanography · doi:10.1111/j.1365-2419.2010.00556.x · Cited by 140 · see citing works
Open ocean dead zones in the tropical North Atlantic Ocean.
Karstensen, J., Fiedler, B., Schütte, F., Brandt, P., Körtzinger, A., Fischer, G., Zantopp, R., Hahn, J., Visbeck, M., & Wallace, D. (2015) · Biogeosciences · doi:10.5194/bg-12-2597-2015 · Cited by 105 · see citing works
Self-citationHahn, J., Brandt, P., Greatbatch, R. J., Krahmann, G., & Körtzinger, A. (2014) · Climate Dynamics · doi:10.1007/s00382-014-2065-0 · Cited by 48 · see citing works
Self-citation
- Authors
- Stramma, L., Visbeck, M., Brandt, P., Tanhua, T., & Wallace, D.
- Affiliations
- Christian-Albrechts-Universität zu Kiel (DE)
- Venue
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Published
- 2009-10
- Volume
- 36
- Issue
- 20
- ISSN
- 0094-8276 (ISSN-L)
- 1944-8007
- OpenAlex
- W2052367381
- Cited by
- 52
- References
- 1
- Citations by year
- 2026: 1 · 2024: 2 · 2023: 5 · 2022: 2 · 2021: 1 · 2020: 1 · 2019: 3 · 2018: 1 · 2017: 4 · 2016: 10 · 2015: 5 · 2014: 2 · 2013: 4 · 2012: 6
- FWCI
- 2.56
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Geophysical Research Letters (publishedVersion)
- Helmholtz Centre for Ocean Research Kiel (GEOMAR) (acceptedVersion, other-oa)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine Biology and Ecology Research
- Keywords
- oxygen minimum zone, ocean deoxygenation, eastern tropical North Atlantic, dissolved oxygen, Central Water, surface water warming, decadal variability
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