Antarctic Sea Ice Decline Alters Southern Ocean Freshwater Dynamics

New research indicates that the rapid decline of Antarctic sea ice since 2016 has caused an abrupt reversal in the long-term trends of the Antarctic Intermediate Water (AAIW). This crucial freshwater layer in the Southern Hemisphere is now saltier, denser, and deeper, a shift typically seen over millennia but occurring in just a few years. This change could lead to underestimations of deep-ocean warming and rising sea levels, impacting global climate models.