Tue, December 15, 2009
Sci-Tech > Science

Giant iceberg off Australia breaking up

2009-12-15 07:51:52 GMT2009-12-15 15:51:52 (Beijing Time)  SINA.com

A girl walks at a beach damaged by erosion at Fuvahmulah December 9, 2009.The largest-ever climate talks formally opened on Monday in Denmark aiming to agree the outlines of global deal to stave off dangerous climate change, such as rising seas and more intense storms. Picture taken December 9.(REUTERS/Reinhard Krause)

This image provided by Australian Antarctic Division shows a satellite view of the giant iceberg, fourth from right, named B17B which is moving towards Western Australia, according to a Tasmanian scientist. Glaciologist Neal Young of Australian Antarctic Division said the iceberg, known as B-17-B, was still largely intact and is currently 1700 kilometres south-south-west of the West Australian coast and moving north with the ocean current and prevailing wind. Its journey began almost 10 years ago when it broke away from the Ross ice shelf in Antarctica. Young said it was 'very rare' to get such a big iceberg up at those sort of latitudes.(AP Photo/Australian Antarctic Division)

A massive iceberg edging slowly toward Australia's southwestern coast is breaking up into hundreds of smaller icebergs as it drifts into warmer waters, creating potentially hazardous conditions for ships trying to navigate the region, a scientist said Tuesday.

The iceberg, known as B17B, was spotted last week on satellite imaging about 1,100 miles (1,700 kilometers) off Western Australia state, prompting Australia's Bureau of Meteorology to issue a shipping alert.

Since then, it has shrunk from 54 square miles (140 square kilometers) to 44 square miles (115 square kilometers), or around 11 miles (18 kilometers) long and 5 miles (8 kilometers) wide, said glaciologist Neal Young of the Australian Antarctic Division.

The iceberg has broken up into hundreds of smaller icebergs, some up to several miles (kilometers) wide, and spread over more than 620 miles (1,000 kilometers) of ocean, he said.

"I expect it to dissipate," Young said. But exactly when, he added, is anyone's guess.

The iceberg is one of several that split off in Antarctica in 2000 when parts of two major ice shelves — the Ross Sea Ice Shelf and Ronne Ice Shelf — fractured.

New Zealand issued a shipping alert last month after authorities spotted a flotilla of icebergs heading toward South Island. Those icebergs have since moved east, away from New Zealand.

Icebergs are routinely sloughed off as part of the natural development of ice shelves.

B17B is expected to continue moving east.


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