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Major Southern Hemisphere ocean layer shifts, raising questions about heat and carbon storage

Phys.org · WORLD · Science · 10/28/2026, 6:00:01 AM

The Antarctic Intermediate Water (AAIW)—a vast layer of fresh water spanning much of the Southern Hemisphere's ocean—has rapidly reversed its long-term trends in salinity and density, according to new research. The AAIW helps store carbon, supply oxygen and drive global ocean currents.

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