Articles | Volume 19, issue 5
Research article
18 Oct 2023
Research article |  | 18 Oct 2023

Stirring across the Antarctic Circumpolar Current's southern boundary at the prime meridian, Weddell Sea

Ria Oelerich, Karen J. Heywood, Gillian M. Damerell, Marcel du Plessis, Louise C. Biddle, and Sebastiaan Swart

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Cited articles

Azaneu, M., Heywood, K. J., Queste, B. Y., and Thompson, A. F.: Variability of the Antarctic Slope Current System in the Northwestern Weddell Sea, J./ Phys. Oceanogr., 47, 2977–2997,, 2017. a, b
Billany, W., Swart, S., Hermes, J., and Reason, C. J. C.: Variability of the Southern Ocean fronts at the Greenwich Meridian, J. Mar. Syst., 82, 304–310,, 2010. a, b, c, d, e, f
Bower, A. S., Rossby, H. T., and Lillibridge, J. L.: The Gulf Stream – Barrier or Blender?, J. Phys. Oceanogr., 15, 24–32,<0024:tgsob>;2, 1985. a
Chapman, C. C. and Sallée, J.-B.: Isopycnal Mixing Suppression by the Antarctic Circumpolar Current and the Southern Ocean Meridional Overturning Circulation, J. Phys. Oceanogr., 47, 2023–2045,, 2017. a, b
Chapman, C. C., Lea, M.-A., Meyer, A., Sallée, J.-B., and Hindell, M.: Defining Southern Ocean fronts and their influence on biological and physical processes in a changing climate, Nat. Clim. Change, 10, 209–219,, 2020. a, b, c
Short summary
At the southern boundary of the Antarctic Circumpolar Current, relatively warm waters encounter the colder waters surrounding Antarctica. Observations from underwater vehicles and altimetry show that medium-sized cold-core eddies influence the southern boundary's barrier properties by strengthening the slopes of constant density lines across it and amplifying its associated jet. As a result, the ability of exchanging properties, such as heat, across the southern boundary is reduced.