Bottom water oxygenation changes in the southwestern Indian Ocean as an indicator for enhanced respired carbon storage since the last glacial inception

Amsler, Helen Eri; Thöle, Lena Mareike; Stimac, Ingrid; Geibert, Walter; Ikehara, Minoru; Kuhn, Gerhard; Esper, Oliver; Jaccard, Samuel Laurent

doi:https://doi.org/10.5194/cp-18-1797-2022

Articles | Volume 18, issue 8

https://doi.org/10.5194/cp-18-1797-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/cp-18-1797-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 8

Research article

|

09 Aug 2022

Research article |

| 09 Aug 2022

Bottom water oxygenation changes in the southwestern Indian Ocean as an indicator for enhanced respired carbon storage since the last glacial inception

Helen Eri Amsler, Lena Mareike Thöle, Ingrid Stimac, Walter Geibert, Minoru Ikehara, Gerhard Kuhn, Oliver Esper, and Samuel Laurent Jaccard

Data sets

Paleoceanographic dynamics of the Southern Indian Ocean reconstructed from geochemical and sedimentological proxies across the last glacial cycle H. E. Amsler https://doi.org/10.48620/69

Short summary

We present sedimentary redox-sensitive trace metal records from five sediment cores retrieved from the SW Indian Ocean. These records are indicative of oxygen-depleted conditions during cold periods and enhanced oxygenation during interstadials. Our results thus suggest that deep-ocean oxygenation changes were mainly controlled by ocean ventilation and that a generally more sluggish circulation contributed to sequestering remineralized carbon away from the atmosphere during glacial periods.