Articles | Volume 20, issue 1
https://doi.org/10.5194/os-20-85-2024
https://doi.org/10.5194/os-20-85-2024
Research article
 | 
22 Jan 2024
Research article |  | 22 Jan 2024

Altered Weddell Sea warm- and dense-water pathways in response to 21st-century climate change

Cara Nissen, Ralph Timmermann, Mathias van Caspel, and Claudia Wekerle

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Cited articles

Abrahamsen, E. P., Meijers, A. J. S., Polzin, K. L., Garabato, A. C. N., King, B. A., Firing, Y. L., Sallée, J.-B., Sheen, K. L., Gordon, A. L., Huber, B. A., and Meredith, M. P.: Stabilization of dense Antarctic water supply to the Atlantic Ocean overturning circulation, Nat. Clim. Change, 9, 742–746, https://doi.org/10.1038/s41558-019-0561-2, 2019. a, b, c
Absy, J., Schröder, M., Muench, R., and Hellmer, H.: Early summer thermohaline characteristics and mixing in the western Weddell Sea, Deep-Sea Res. Pt. II, 55, 1117–1131, https://doi.org/10.1016/j.dsr2.2007.12.023, 2008. a
Akhoudas, C., Sallée, J.-B., Reverdin, G., Aloisi, G., Benetti, M., Vignes, L., and Gelado, M.: Ice Shelf Basal Melt and Influence on Dense Water Outflow in the Southern Weddell Sea, J. Geophys. Res.-Oceans, 125, 1–19, https://doi.org/10.1029/2019JC015710, 2020. a
Akhoudas, C., Sallée, J.-B., Haumann, F. A., Meredith, M. P., Garabato, A. N., Reverdin, G., Jullion, L., Aloisi, G., Benetti, M., Leng, M. J., and Arrowsmith, C.: Ventilation of the abyss in the Atlantic sector of the Southern Ocean, Sci. Rep.-UK, 11, 6760, https://doi.org/10.1038/s41598-021-86043-2, 2021. a
Caccavo, J., Ashford, J., Ryan, S., Papetti, C., Schröder, M., and Zane, L.: Spatial structuring and life history connectivity of Antarctic silverfish along the southern continental shelf of the Weddell Sea, Mar. Ecol. Prog. Ser., 624, 195–212, https://doi.org/10.3354/meps13017, 2019. a, b
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Short summary
The southeastern Weddell Sea is important for global ocean circulation due to the cross-shelf-break exchange of Dense Shelf Water and Warm Deep Water, but their exact circulation pathways remain elusive. Using Lagrangian model experiments in an eddy-permitting ocean model, we show how present circulation pathways and transit times of these water masses on the continental shelf are altered by 21st-century climate change, which has implications for local ice-shelf basal melt rates and ecosystems.