Antarctic ice collapse tied to greenhouse gases

OSLO (Reuters) - Scientists said on Monday that they had found the first direct evidence linking the collapse of an ice shelf in Antarctica to global warming widely blamed on human activities.

gases, had warmed the Antarctic peninsula jutting up toward South America and contributed to the break-up of the Larsen B ice shelf in 2002, they said.

"This is the first time that anyone has been able to demonstrate a physical process directly linking the break-up of the Larsen Ice Shelf to human activity," said Gareth Marshall, lead author of the study at the British Antarctic Survey.

The chunk that collapsed into the Weddell Sea in 2002 was 3,250 sq kms (1,255 sq miles), bigger than Luxembourg or the U.S. state of Rhode Island.