Ocean Science
Ocean Science
OS
Articles | Volume 17, issue 3
Articles | Volume 17, issue 3
https://doi.org/10.5194/os-17-833-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-17-833-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 3
Research article
 | Highlight paper
 | 
01 Jul 2021
Research article | Highlight paper |  | 01 Jul 2021

Tropical deoxygenation sites revisited to investigate oxygen and nutrient trends

Lothar Stramma and Sunke Schmidtko

Supplement

https://doi.org/10.5194/os-17-833-2021-supplement

Data sets

data_collection_Stramma_Schmidtko_Ocean_Sci_2021.zip S. Schmidtko https://cloud.geomar.de/s/tmJWCFJ27gPBmpa

Physical oceanogra- phy during METEOR cruise M120 R. Kopte and M. Dengler https://doi.org/10.1594/PANGAEA.868654

Ventilation of the eastern tropical North Atlantic by intraseasonal flow events of the North Equatorial Undercurrent K. Burmeister, J. Lübbecke, P. Brandt, M. Claus, and J. Hahn https://doi.org/10.1594/PANGAEA.903913

Physical Oceanography (CTD) during METEOR cruise M145 P. Brandt and G. Krahmann https://doi.org/10.1594/PANGAEA.904382

Physical oceanog- raphy (CTD) during METEOR cruise M131 P. Brandt, R. Kopte, and G. Krahmann https://doi.org/10.1594/PANGAEA.910994

Hydrochemistry of water samples during METEOR cruise M83/1 T. Tanhua https://doi.org/10.1594/PANGAEA.821729

Hydrochemistry of water samples during METEOR cruise M97 T. Tanhua https://doi.org/10.1594/PANGAEA.863119

Hydrochemistry and molecular biology during Maria S. Merian cruise MSM10/1 T. Tanhua, L. Stramma, F. Desai, and C. R. Löscher https://doi.org/10.1594/PANGAEA.775074

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Short summary
Six tropical areas in the Pacific, Atlantic and Indian oceans were investigated for trends for the years since 1950 for temperature, salinity, oxygen and nutrients at 50 to 300 m and 300 to 700 m depth. Generally, temperature increases, oxygen decreases and nutrients often increase. Overlain variability on the trends seem to be related to climate modes. Different trends indicate that oxygen and nutrient trends cannot by completely explained by local warming.
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