Antarctic ice data reliable for sea-level planning only until mid-century

Recent measurements of Antarctic ice loss offer a solid foundation for governments planning coastal defenses over the next 30 to 50 years. However, scientists warn that projections beyond mid-century may become less dependable as ice melt accelerates. The available window is considered critical for upgrading monitoring infrastructure and strengthening coastal protections. Pacific island nations, which are especially vulnerable to rising seas, stand to benefit most from acting on this data promptly. Experts urge policymakers to use this period strategically before uncertainty in long-range climate models increases.