Overview
- Published in PNAS, the satellite synthesis spanning 1992–2025 finds retreat concentrated along 23% of Antarctica’s coast, with 77% largely unchanged.
- Losses cluster in West Antarctica and the Antarctic Peninsula, including the Amundsen and Bellingshausen seas, the Getz sector, and the Wilkes and George V lands.
- Several major outlets have pulled back by tens of kilometers, including Pine Island (~33 km), Thwaites (~26 km), and Smith (~42 km).
- Researchers integrated data from 15 satellite missions, including commercial synthetic‑aperture radar, and estimate an average coastal loss rate of about 442 km² per year.
- Some northeast Peninsula retreats lack a clear warm‑water cause, and recent gravimetry indicates short‑term continent‑wide mass gains from increased snowfall, highlighting regional variability and sea‑level uncertainty.