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How openings in Antarctic sea ice affect worldwide climate

In 1974, images acquired from NOAA satellites revealed a puzzling phenomenon: a 250,000 square kilometer Opening in the winter Sea Ice in the Weddell Sea, south of South America. The opening, known as a polynya, persisted over three winters. Such expansive ice-free areas in the ocean surrounding Antarctica have not been seen since, though a small polynya was seen last year. A polynya, or an opening in the sea ice, was present in the...

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How openings in Antarctic sea ice affect worldwide climate

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