# Antarctic sea ice loss coincides with rising Southern Ocean salinity

- URL: https://talkfuse.com/story/a-hidden-ocean-change-near-antarctica-could-have-global-consequences/
- Published: 2026-10-28T13:38:53+00:00
- Updated: 2026-10-28T14:48:08+00:00
- Original publisher: Ars Technica
- Original article: https://arstechnica.com/science/2026/10/antarctic-sea-ice-loss-could-reshape-weather-far-beyond-the-pole/
- Topics: Software

## Key points

- Deep Antarctic waters have become markedly saltier.
- The shift follows years of unusually low sea ice.
- Scientists say global effects are possible but uncertain.

## Summary

Researchers have found that a rapid loss of Antarctic sea ice since 2016 coincides with a sharp rise in salinity in a deep layer of the Southern Ocean. The change reverses decades of freshening and may affect ocean circulation, with consequences for how heat and carbon move around the planet.

The study used six datasets, including measurements from Argo floats, to track ocean conditions from 2004 to 2024. Antarctic sea ice fell to a record low in 2023, about one million square miles below the 1981–2010 average. Scientists say the salinity shift could alter heat storage and redistribution, but the record is too short to show whether it will last; they call for more monitoring and better climate models.

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