Articles | Volume 22, issue 4
https://doi.org/10.5194/bg-22-975-2025
https://doi.org/10.5194/bg-22-975-2025
Research article
 | 
20 Feb 2025
Research article |  | 20 Feb 2025

Climate-driven shifts in Southern Ocean primary producers and biogeochemistry in CMIP6 models

Ben J. Fisher, Alex J. Poulton, Michael P. Meredith, Kimberlee Baldry, Oscar Schofield, and Sian F. Henley

Related authors

Biogeochemistry of climate driven shifts in Southern Ocean primary producers
Ben J. Fisher, Alex J. Poulton, Michael P. Meredith, Kimberlee Baldry, Oscar Schofield, and Sian F. Henley
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-10,https://doi.org/10.5194/bg-2023-10, 2023
Revised manuscript not accepted
Short summary
Technical note: Uncovering the influence of methodological variations on the extractability of iron-bound organic carbon
Ben J. Fisher, Johan C. Faust, Oliver W. Moore, Caroline L. Peacock, and Christian März
Biogeosciences, 18, 3409–3419, https://doi.org/10.5194/bg-18-3409-2021,https://doi.org/10.5194/bg-18-3409-2021, 2021
Short summary

Related subject area

Biogeochemistry: Open Ocean
An upper-mesopelagic-zone carbon budget for the subarctic North Pacific
Brandon M. Stephens, Montserrat Roca-Martí, Amy E. Maas, Vinícius J. Amaral, Samantha Clevenger, Shawnee Traylor, Claudia R. Benitez-Nelson, Philip W. Boyd, Ken O. Buesseler, Craig A. Carlson, Nicolas Cassar, Margaret Estapa, Andrea J. Fassbender, Yibin Huang, Phoebe J. Lam, Olivier Marchal, Susanne Menden-Deuer, Nicola L. Paul, Alyson E. Santoro, David A. Siegel, and David P. Nicholson
Biogeosciences, 22, 3301–3328, https://doi.org/10.5194/bg-22-3301-2025,https://doi.org/10.5194/bg-22-3301-2025, 2025
Short summary
Ocean alkalinity enhancement in an open-ocean ecosystem: biogeochemical responses and carbon storage durability
Allanah Joy Paul, Mathias Haunost, Silvan Urs Goldenberg, Jens Hartmann, Nicolás Sánchez, Julieta Schneider, Niels Suitner, and Ulf Riebesell
Biogeosciences, 22, 2749–2766, https://doi.org/10.5194/bg-22-2749-2025,https://doi.org/10.5194/bg-22-2749-2025, 2025
Short summary
Relationships between the concentration of particulate organic nitrogen and the inherent optical properties of seawater in oceanic surface waters
Alain Fumenia, Hubert Loisel, Rick A. Reynolds, and Dariusz Stramski
Biogeosciences, 22, 2461–2484, https://doi.org/10.5194/bg-22-2461-2025,https://doi.org/10.5194/bg-22-2461-2025, 2025
Short summary
Inadequacies in the representation of sub-seasonal phytoplankton dynamics in Earth system models
Madhavan Girijakumari Keerthi, Olivier Aumont, Lester Kwiatkowski, and Marina Levy
Biogeosciences, 22, 2163–2180, https://doi.org/10.5194/bg-22-2163-2025,https://doi.org/10.5194/bg-22-2163-2025, 2025
Short summary
Nitrogen dynamics and nitrate stable isotopes indicate nitrogen loss in the Bay of Bengal
Gesa Schulz, Kirstin Dähnke, Tina Sanders, Jan Penopp, Hermann W. Bange, Rena Czeschel, and Birgit Gaye
EGUsphere, https://doi.org/10.5194/egusphere-2025-1660,https://doi.org/10.5194/egusphere-2025-1660, 2025
Short summary

Cited articles

Annett, A. L., Skiba, M., Henley, S. F., Venables, H. J., Meredith, M. P., Statham, P. J., and Ganeshram, R. S.: Comparative roles of upwelling and glacial iron sources in Ryder Bay, coastal western Antarctic Peninsula, Mar. Chem., 176, 21–33, https://doi.org/10.1016/j.marchem.2015.06.017, 2015. 
Arrigo, K. R., Mills, M. M., Kropuenske, L. R., van Dijken, G. L., Alderkamp, A. C., and Robinson, D. H.: Photophysiology in two major southern ocean phytoplankton taxa: photosynthesis and growth of Phaeocystis antarctica and Fragilariopsis cylindrus under different irradiance levels, Integr. Comp. Biol., 50, 950–966, https://doi.org/10.1093/icb/icq021, 2010. 
Atkinson, A., Hill, S. L., Pakhomov, E. A., Siegel, V., Reiss, C. S., Loeb, V. J., Steinberg, D. K., Schmidt, K., Tarling, G. A., and Gerrish, L.: Krill (Euphausia superba) distribution contracts southward during rapid regional warming, Nat. Clim. Change, 9, 142–147, 2019. 
Balaguer, J., Koch, F., Hassler, C., and Trimborn, S.: Iron and manganese co-limit the growth of two phytoplankton groups dominant at two locations of the Drake Passage, Commun. Biol., 5, 207, https://doi.org/10.1038/s42003-022-03148-8, 2022. 
Ballerini, T., Hofmann, E. E., Ainley, D. G., Daly, K., Marrari, M., Ribic, C. A., Smith, W. O., and Steele, J. H.: Productivity and linkages of the food web of the southern region of the western Antarctic Peninsula continental shelf, Prog. Oceanogr., 122, 10–29, https://doi.org/10.1016/j.pocean.2013.11.007, 2014. 
Download
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.
Share
Altmetrics
Final-revised paper
Preprint