Articles | Volume 22, issue 11
https://doi.org/10.5194/bg-22-2569-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-2569-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
06 Jun 2025
Research article |
| 06 Jun 2025
| 06 Jun 2025
Variable organic matter stoichiometry enhances the biological drawdown of CO2 in the northwest European shelf seas
Kubilay Timur Demir
CORRESPONDING AUTHOR
Matter Transport and Ecosystem Dynamics, Institute of Coastal Systems – Analysis and Modeling, Helmholtz-Zentrum Hereon, Geesthacht, Germany
Moritz Mathis
Matter Transport and Ecosystem Dynamics, Institute of Coastal Systems – Analysis and Modeling, Helmholtz-Zentrum Hereon, Geesthacht, Germany
Jan Kossack
Matter Transport and Ecosystem Dynamics, Institute of Coastal Systems – Analysis and Modeling, Helmholtz-Zentrum Hereon, Geesthacht, Germany
Feifei Liu
Matter Transport and Ecosystem Dynamics, Institute of Coastal Systems – Analysis and Modeling, Helmholtz-Zentrum Hereon, Geesthacht, Germany
Ute Daewel
Matter Transport and Ecosystem Dynamics, Institute of Coastal Systems – Analysis and Modeling, Helmholtz-Zentrum Hereon, Geesthacht, Germany
Christoph Stegert
Bundesamt für Seeschifffahrt und Hydrographie, Hamburg, Germany
Helmuth Thomas
Institute of Carbon Cycles, Helmholtz-Zentrum Hereon, Geesthacht, Germany
Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
Corinna Schrum
Matter Transport and Ecosystem Dynamics, Institute of Coastal Systems – Analysis and Modeling, Helmholtz-Zentrum Hereon, Geesthacht, Germany
Institute of Oceanography, University of Hamburg, Hamburg, Germany
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Short summary
This study examines how variations in the ratios of carbon, nitrogen, and phosphorus in organic matter affect carbon cycling in the northwest European shelf seas. Traditional models with fixed ratios tend to underestimate biological carbon uptake. By integrating variable ratios into a regional model, we find that carbon dioxide uptake increases by 9 %–31 %. These results highlight the need to include variable ratios for accurate assessments of regional and global carbon cycles.
This study examines how variations in the ratios of carbon, nitrogen, and phosphorus in organic...
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