Recently, the British Antarctic Survey has released an aerial photograph of a moving iceberg that covers an area of 1,577 square kilometers, which is equivalent to the entire Greater London area.。This iceberg has been named A81。In January this year, the A81 iceberg broke away from the ice shelf due to a huge crack in the Brent Ice Shelf in Antarctica.。At present, the iceberg has moved 150 kilometers to the south. It is understood that this is the second time in nearly two years that the ice shelf has disintegrated in the region.。