Sedimentary alkalinity generation and long-term alkalinity development in the Baltic Sea

Gustafsson, Erik; Hagens, Mathilde; Sun, Xiaole; Reed, Daniel C.; Humborg, Christoph; Slomp, Caroline P.; Gustafsson, Bo G.

doi:https://doi.org/10.5194/bg-16-437-2019

Articles | Volume 16, issue 2

https://doi.org/10.5194/bg-16-437-2019

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

Special issue:

The 10th International Carbon Dioxide Conference (ICDC10)...

https://doi.org/10.5194/bg-16-437-2019

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

Articles | Volume 16, issue 2

Research article

|

25 Jan 2019

Research article |

| 25 Jan 2019

Sedimentary alkalinity generation and long-term alkalinity development in the Baltic Sea

Erik Gustafsson, Mathilde Hagens, Xiaole Sun, Daniel C. Reed, Christoph Humborg, Caroline P. Slomp, and Bo G. Gustafsson

Supplement

https://doi.org/10.5194/bg-16-437-2019-supplement

Data sets

(Table B1) Geochemistry of Baltic Sea sediments Tom Jilbert, Caroline P. Slomp, Bo G. Gustafsson, and Wim Boer https://doi.org/10.1594/PANGAEA.775277

(Table A1) Geochemistry of Baltic Sea porewater samples and bottom water oxygen concentrations Tom Jilbert, Caroline P. Slomp, Bo G. Gustafsson, and Wim Boer https://doi.org/10.1594/PANGAEA.775278

Total organic carbon and selecetd elements of sediment core F80-A Conny Lenz, Tom Jilbert, Daniel J. Conley, and Caroline P. Slomp https://doi.org/10.1594/PANGAEA.854127

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Short summary

This work highlights that iron (Fe) dynamics plays a key role in the release of alkalinity from sediments, as exemplified for the Baltic Sea. It furthermore demonstrates that burial of Fe sulfides should be included in alkalinity budgets of low-oxygen basins. The sedimentary alkalinity generation may undergo large changes depending on both organic matter loads and oxygen conditions. Enhanced release of alkalinity from the seafloor can increase the CO₂ storage capacity of seawater.