Indian Scientists Identify Cause of Antarctica's Unusual Winter Sea Ice Hole

Indian scientists have identified the cause of a large hole in Antarctica's sea ice, revealing the role of extreme weather conditions including atmospheric rivers and marine heatwaves.

Key facts

• A hole the size of Portugal appeared in Breid Bay, East Antarctica, in August 2024.
• The hole, known as a polynya, puzzled scientists due to its occurrence in the typically ice-covered region.
• Researchers found that intense atmospheric rivers and marine heatwaves caused the ice to open.
• At least six atmospheric rivers were recorded from July to August, contributing to the phenomenon.
• The 'Ekman suction' phenomenon and sustained marine heatwaves also played a role in preventing the ice from freezing.

Sources

• WION