Antarctica Experiences Record Loss of Sea Ice Mass

Scientists have raised alarms over substantial ice losses in Antarctica, where the sea to the continent's west remains devoid of ice after record-breaking heatwaves struck the region in early June.

Satellite imagery reveals that the Bellingshausen Sea, located west of the Antarctic Peninsula and typically ice-covered through June—the start of winter in Antarctica—is now completely free of ice.

Experts estimate that approximately 650,000 square kilometers of sea ice are missing compared to the 1991–2020 average. Three of the last four years have recorded declines in sea ice coverage in this area, suggesting the possibility that the ice there may never return.

On June 10, 2026, the total sea ice extent around Antarctica measured about 11.4 million square kilometers, significantly below the long-term average of 12.6 million square kilometers for that date.

Earlier, the Argentine Meteorological Service reported record temperatures of 15.4°C and 13.4°C at the Esperanza Base, situated at the northeastern tip of the Antarctic Peninsula, on June 5 and 6. These temperatures surpassed the previous record set in 1998.

Scientists indicate these changes could be critical for the ecosystem, as ice typically provides habitat for krill—microscopic crustaceans forming the foundation of the oceanic food chain. The retreat of ice substantially impacts penguin and seal populations, forcing them to migrate longer distances, which in turn affects the timing and success of their breeding.

Additionally, researchers express concern that the loss of ice on the continental shelf may accelerate the melting of the continental ice sheet and the well-known "Doomsday" glacier.