Sediment release of dissolved organic matter to the oxygen minimum zone off Peru

Loginova, Alexandra N.; Dale, Andrew W.; Le Moigne, Frédéric A. C.; Thomsen, Sören; Sommer, Stefan; Clemens, David; Wallmann, Klaus; Engel, Anja

doi:https://doi.org/10.5194/bg-17-4663-2020

Articles | Volume 17, issue 18

https://doi.org/10.5194/bg-17-4663-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Ocean deoxygenation: drivers and consequences – past, present...

https://doi.org/10.5194/bg-17-4663-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 18

Research article

|

25 Sep 2020

Research article |

| 25 Sep 2020

Sediment release of dissolved organic matter to the oxygen minimum zone off Peru

Alexandra N. Loginova, Andrew W. Dale, Frédéric A. C. Le Moigne, Sören Thomsen, Stefan Sommer, David Clemens, Klaus Wallmann, and Anja Engel

Supplement

https://doi.org/10.5194/bg-17-4663-2020-supplement

Data sets

Organic matter sediment release during METOR cruise M136: BIGO data Alexandra Loginova and Anja Engel https://doi.pangaea.de/10.1594/PANGAEA.913476

Organic matter sediment release during METOR cruises M136 and M137: Multicorer data Alexandra Loginova and Anja Engel https://doi.pangaea.de/10.1594/PANGAEA.913477

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Short summary

We measured dissolved organic carbon (DOC), nitrogen (DON) and matter (DOM) optical properties in pore waters and near-bottom waters of the eastern tropical South Pacific off Peru. The difference between diffusion-driven and net fluxes of DOC and DON and qualitative changes in DOM optical properties suggested active microbial utilisation of the released DOM at the sediment–water interface. Our results suggest that the sediment release of DOM contributes to microbial processes in the area.