A-74 iceberg near collision with Brunt Ice Shelf. Ice cracks force shutdown of UK Antarctic station (Update) Jan 16, 2017. The BAS operates a base on the Brunt Ice. Scientists do not directly attribute the new glacier's calving to climate change, as such shifts in ice shelves are considered natural, but scientists agree climate change contributed to the disintegration of both Larsen A and Larsen B ice shelves, beginning in the 1990s. The enormity of A-76, which broke away from Antarctica’s Ronne ice shelf, ranks as the largest existing iceberg on the planet surpassing A-23A, which is about 3,380 sq km and is also. Giant iceberg breaks off near UK Antarctic base. A massive iceberg twice as big as the city of Toronto broke off Antarctica on Friday, according to a news release from the British Antarctic Survey (BAS). “It’s like your ice cube in your gin and tonic-it is already floating and if it melts it doesn’t change the volume of water in the glass by very much at all,” Anna Hogg, a glacier expert from the University of Leeds, told The Guardian. Sea levels will not immediately rise, according to Project MIDAS, as A68 was already floating, but further destabilization of the ice shelf could lead to its collapse, which would contribute to rising sea levels. 'Some of the ice may remain in the area for decades, while parts of the iceberg. An iceberg has broken off Pine Island Glacier (PIG) on the edge of Antarctica, according to satellite images taken Tuesday by the European Space Agency (ESA). 'It may remain in one piece but is more likely to break into fragments,' Adrian Luckman, a professor at Swansea University and lead investigator of Project MIDAS, told Reuters.

Antarctica iceberg breaks off