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Drivers of ocean warming in the western boundary currents of the Southern Hemisphere
Li, J.; Roughan, M.; Kerry, C. (2022). Drivers of ocean warming in the western boundary currents of the Southern Hemisphere. Nat. Clim. Chang. 12(10): 901-909. https://dx.doi.org/10.1038/s41558-022-01473-8
In: Nature Climate Change. Nature Publishing Group: London. ISSN 1758-678X; e-ISSN 1758-6798
Is gerelateerd aan:
Yang, H. (2022). Warming hotspots induced by more eddies. Nat. Clim. Chang. 12(10): 889-890. https://dx.doi.org/10.1038/s41558-022-01488-1, meer
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  • Li, J.
  • Roughan, M.
  • Kerry, C.
Abstract
    Western boundary currents (WBCs) of the Southern Hemisphere transport heat poleward and are regions of rapid ocean warming. However, the mechanisms responsible for the enhanced warming over the Southern Hemisphere WBC extensions are still debated. Here we show that enhanced eddy generation in the WBC extensions through changes in barotropic and baroclinic instabilities results in enhanced ocean warming as the eddies propagate. This results from a poleward shift of the WBCs, associated with changes in the mid-latitude easterly winds. Consequently, the WBCs have penetrated poleward but not strengthened and are now transporting more heat into their extensions. Our study clearly elucidates the dynamic processes driving increased eddying and warming in the Southern Hemisphere WBC extensions and has implications for understanding and predicting ocean warming, marine heatwaves and the impact on the marine ecosystem in the WBC extensions under climate change.
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