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Story summary
- A study in the Proceedings of the National Academy of Sciences reports Antarctica lost 12,820 square kilometers of ice over 30 years, with rapid West Antarctica melting due to warm ocean water.
- The report highlights the Smith, Pine Island, and Thwaites glaciers as major retreat sites.
- Seventy-seven percent of Antarctica's grounding line remains stable.
- If the West Antarctic Ice Sheet collapses, sea levels could rise by up to 9 feet.
