Context
The giant Antarctic iceberg A23a, once the world’s largest, is drifting northwards into warmer waters of the South Atlantic near South Georgia Island, entering the final stage of its life cycle.
About A23a
• One of the largest icebergs ever recorded (~3,900 sq km).
• Broke off from Antarctica’s Filchner–Ronne Ice Shelf in 1986.
• Remained grounded in the Weddell Sea for decades before drifting since the 2020s.
• Now moving into warmer waters → expected to fragment and melt.
