A massive crack in one of Antarctica's largest ice shelves is very close to breaking point, and when it fractures it will create an iceberg bigger than Kangaroo Island.
The Larsen C ice shelf is located on the Antarctic Peninsula, which juts out towards South America.
A large fracture, which has been growing across the ice sheet for decades, has recently started to accelerate, said Sue Cook, a glaciologist from the Antarctic Climate and Ecosystems Cooperative Research Centre.
According to the latest data by a team of UK scientists, the fracture ripped open by 17 kilometres in the last week of May and turned towards the ocean.
Dr Cook said the lengthening fracture was within 13 kilometres of the sea, and there was nothing to stop it fracturing.
When it breaks it will create an iceberg of 5,000 square kilometres.
Dr Cook said it was really hard to pin down exactly why this is happening.
The Antarctic Peninsula is rapidly warming, but there is no evidence to link the cracking of the ice shelf to climate change.
"In this case it is really hard to say whether it has something to do with global warming or not," Dr Cook told the World Today.
Dr Cook said once this iceberg calved, the front of the shelf would have moved back to the furthest point that's ever been recorded.
"So that implies that there is a process that is causing it to move more ice than it has in the past," she said.
http://www.abc.net.au/news/science/2017-06-02/antarcticas-larsen-c-ice-shelf-clo...