Antarctic sea ice defied global warming for decades—now, hidden ocean heat is breaking through

PHYSorg
May 11, 2026, 3:20 pm253 ptsTop
For decades, Antarctica seemed to defy global warming. Since satellites began monitoring the poles in the late 1970s, the seasonal growth and retreat of Antarctic sea ice—frozen seawater that expands around the continent each winter—appeared remarkably resilient. It was often described as the "heartbeat of…

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