Biogeosciences
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Articles | Volume 23, issue 19
Articles | Volume 23, issue 19
https://doi.org/10.5194/bg-23-6947-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-6947-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 19
Research article
 | 
06 Oct 2026
Research article |  | 06 Oct 2026

Towards constraining the drivers of variability and trends in subantarctic productivity

Christopher D. Traill, Tyler W. Rohr, Elizabeth H. Shadwick, Pearse J. Buchanan, Alessandro Tagliabue, and Andrew R. Bowie

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Latest update: 06 Oct 2026
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Short summary
Southern Ocean phytoplankton are a key part of the carbon cycle, yet year-to-year changes in ocean productivity are poorly understood. Using model simulations, this study shows how deeper mixing in the most productive years increases nutrient supply and changes the predator-prey relationship between phytoplankton and zooplankton. This helps explain why satellite productivity estimates disagree, and the reasons for why climate projections might be getting inaccurate estimates of future production.
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