Ocean Science
Ocean Science
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Articles | Volume 19, issue 6
Articles | Volume 19, issue 6
https://doi.org/10.5194/os-19-1529-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-19-1529-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
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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Latest update: 06 Nov 2025
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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.
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