Articles | Volume 22, issue 4
https://doi.org/10.5194/bg-22-975-2025
© 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-22-975-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
20 Feb 2025
Research article |
| 20 Feb 2025
| 20 Feb 2025
Climate-driven shifts in Southern Ocean primary producers and biogeochemistry in CMIP6 models
School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom
now at: The Lyell Centre for Earth and Marine Sciences and Technology, Heriot-Watt University, Edinburgh, United Kingdom
Alex J. Poulton
The Lyell Centre for Earth and Marine Sciences and Technology, Heriot-Watt University, Edinburgh, United Kingdom
Michael P. Meredith
British Antarctic Survey, Cambridge, United Kingdom
Kimberlee Baldry
Institute for Marine and Antarctic Studies, College of Sciences and Engineering, University of Tasmania, Hobart, TAS, Australia
Oscar Schofield
Center for Ocean Observing Leadership, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ 08901, USA
Sian F. Henley
School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom
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Hyewon Heather Kim, Ya-Wei Luo, Hugh W. Ducklow, Oscar M. Schofield, Deborah K. Steinberg, and Scott C. Doney
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Ben J. Fisher, Johan C. Faust, Oliver W. Moore, Caroline L. Peacock, and Christian März
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Short summary
The Southern Ocean is a rapidly warming environment, with subsequent impacts on ecosystems and biogeochemical cycling. This study examines changes in phytoplankton and biogeochemistry using a range of climate models. Under climate change, the Southern Ocean will be warmer, more acidic and more productive and will have reduced nutrient availability by 2100. However, there is substantial variability between models across key productivity parameters. We propose ways of reducing this uncertainty.
The Southern Ocean is a rapidly warming environment, with subsequent impacts on ecosystems and...
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