Three polynyas—circular areas free of sea ice—provide tantalizing clues as to why Antarctica’s Pine Island Glacier is melting at an astonishing 100 meters per year.
In a routine survey of Antarctica’s Pine Island Glacier, NASA scientists discovered a large crack in the ice which will soon lead to the birth of a new giant iceberg.
The amount of ice flowing from the Antarctic glacier has doubled in the span of three decades, and scientists think it could undergo even more dramatic changes in the near future.