Articles | Volume 19, issue 6
Research article
07 Nov 2023
Research article |  | 07 Nov 2023

On the drivers of regime shifts in the Antarctic marginal seas, exemplified by the Weddell Sea

Verena Haid, Ralph Timmermann, Özgür Gürses, and Hartmut H. Hellmer

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Cited articles

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Caillet, J., Jourdain, N. C., Mathiot, P., Hellmer, H. H., and Mouginot, J.: Drivers and reversibility of abrupt ocean state transitions in the Amundsen Sea, Antarctica, Earth and Space Science Open Archive, p. 23,, 2022. a
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Short summary
Recently, it was found that cold-to-warm changes in Antarctic shelf sea areas are possible and lead to higher ice shelf melt rates. In modelling experiments, we found that if the highest density in front of the ice shelf becomes lower than the density of the warmer water off-shelf at the deepest access to the shelf, the off-shelf water will flow onto the shelf. Our results also indicate that this change will offer some, although not much, resistance to reversal and constitutes a tipping point.