Articles | Volume 12, issue 3
https://doi.org/10.5194/esd-12-797-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esd-12-797-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
14 Jul 2021
Research article |
| 14 Jul 2021
| 14 Jul 2021
Resolving ecological feedbacks on the ocean carbon sink in Earth system models
David I. Armstrong McKay
CORRESPONDING AUTHOR
Stockholm Resilience Centre, Stockholm University, Stockholm 106 91, Sweden
Bolin Centre for Climate Research, Stockholm University, Stockholm 106 91, Sweden
Sarah E. Cornell
Stockholm Resilience Centre, Stockholm University, Stockholm 106 91, Sweden
Bolin Centre for Climate Research, Stockholm University, Stockholm 106 91, Sweden
Katherine Richardson
Globe Institute, Center for Macroecology, Evolution and Climate, University of Copenhagen, Copenhagen 2100, Denmark
Johan Rockström
Stockholm Resilience Centre, Stockholm University, Stockholm 106 91, Sweden
Potsdam Institute for Climate Impact Research, Potsdam 14473, Germany
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Dag O. Hessen, Tom Andersen, David Armstrong McKay, Sarian Kosten, Mariana Meerhoff, Amy Pickard, and Bryan M. Spears
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Lakes worldwide are changing and under threat due to stressors such as overload of nutrients, increased input of organic carbon (“browning”), and climate change, which may cause reduced water volume, salinization, or even loss of waterbodies. Some of these changes are abrupt to the extent that they can be characterized as tipping points for that particular system. Such changes may also cause increased release of greenhouse gases, and lakes are major players in the global climate in this context.
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Short summary
We use an Earth system model with two new ocean ecosystem features (plankton size traits and temperature-sensitive nutrient recycling) to revaluate the effect of climate change on sinking organic carbon (the
biological pump) and the ocean carbon sink. These features lead to contrary pump responses to warming, with a combined effect of a smaller sink despite a more resilient pump. These results show the importance of including ecological dynamics in models for understanding climate feedbacks.
We use an Earth system model with two new ocean ecosystem features (plankton size traits and...
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