Diapycnal dissolved organic matter supply into the upper Peruvian oxycline

Loginova, Alexandra N.; Thomsen, Sören; Dengler, Marcus; Lüdke, Jan; Engel, Anja

doi:https://doi.org/10.5194/bg-16-2033-2019

Articles | Volume 16, issue 9

https://doi.org/10.5194/bg-16-2033-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-16-2033-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 16, issue 9

Research article

|

15 May 2019

Research article |

| 15 May 2019

Diapycnal dissolved organic matter supply into the upper Peruvian oxycline

Alexandra N. Loginova, Sören Thomsen, Marcus Dengler, Jan Lüdke, and Anja Engel

Data sets

Microstructure Measurements during METEOR cruise M93. GEOMAR – Helmholtz Centre for Ocean Research Kiel Soeren Thomsen https://doi.org/10.1594/PANGAEA.868400

Hydrochemistry of water samples during METEOR cruise M93 Gaute Lavik and Gerd Krahmann https://doi.org/10.1594/PANGAEA.862055

Physical oceanography during METEOR cruise M93 Gerd Krahmann https://doi.org/10.1594/PANGAEA.848017

Dissolved oganic matter measurements off Peru Alexandra Loginova and Anja Engel https://doi.org/10.1594/PANGAEA.900929

Short summary

High primary production in the Peruvian upwelling system is followed by rapid heterotrophic utilization of organic matter and supports the formation of one of the most intense oxygen minimum zones (OMZs) in the world. Here, we estimated vertical fluxes of oxygen and dissolved organic matter (DOM) from the surface to the OMZ. Our results suggest that DOM remineralization substantially reduces oxygen concentration in the upper water column and controls the shape of the upper oxycline.