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Antarctic sea ice loss disrupts key ocean freshwater layer

Original: 28-Oct-2026 # Antarctic sea ice loss batters ocean’s freshwater engine The Antarctic Intermediate Water (AAIW) – a vast

A new study reports that Antarctic Intermediate Water, a vast freshwater layer spreading across much of the Southern Hemisphere's oceans, has rapidly reversed its long-term salinity and density trends. Scientists link the shift to ongoing Antarctic sea ice loss, raising concerns that changes in this layer could weaken the Southern Ocean's role in global circulation and disrupt heat and carbon uptake.

Why now: New research showing rapid reversal of long-term trends in a major ocean layer has alarmed the climate science community.

Antarctic Intermediate WaterSouthern OceanAntarctica

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Evidence

• 28-Oct-2026 # Antarctic sea ice loss batters ocean’s freshwater engine The Antarctic Intermediate Water (AAIW) – a vast layer of fresh water spanning much of the # SouthernHemisphere ’s # ocean – has rapidly reversed its long-term trends in # salinity and density, according to… · proseandpassion · 1

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