Monday, 12 November, 2018

NASA's IceBridge Researchers Find Rectangular Icebergs in Southern Ocean | Geoscience

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																	This giant rectangular iceberg looks totally out of place in Antarctica					
								
			
	
		Mike Wehner Science This giant rectangular iceberg looks totally out of place in Antarctica Mike Wehner
Andrew Wong | 26 October, 2018, 14:18

Lieser said the straight lines are due to the structure of the snow crystals, and how they break apart and react to stresses.

This iceberg captured by NASA - akin to the Wilkins icebergs - was also pretty new and fresh, which certainly helped its profoundly sharp, nearly unnatural appearance. The berg appears toward the end of the clip on the left. NASA's IceBridge mission will use instruments to map Arctic and Antarctic regions annually.

In a different photo, Mr Harbeck captured both the edge of the now-famous iceberg, and a slightly less rectangular iceberg.

Take this iceberg NASA photographed in Antarctica last week as part of Operation IceBridge. Larsen C itself calved an even larger iceberg in 1986, Shuman said.

A month from now, however, waves and melting will likely eat away at the iceberg's sharp, right-angled form. As these tabular bergs float out to sea, any sharp corners are quickly ground down in collisions with other icebergs, or they melt over time.

But it's now on the move, according to Professor Mark Brandon of the Open University - who says the iceberg "will not be stopped easily".

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An iceberg recently spotted by NASA scientists looks like it was carefully cut into a flawless rectangle, and it's getting a lot of attention because of those unexpected angles and straight lines.

Larsen A, an ice shelf farther north on the peninsula, broke up in 1995.

The block of ice is suspiciously ideal for something that's fallen off an ice shelf, but in an interview with LiveScience an ice scientist with NASA and at the University of Maryland, Kelly Brunt, said the berg was formed from a process that's "fairly common".

"What makes this one a bit unusual is that it looks nearly like a square", she told the LiveScience website.

Scientists have repeatedly warned that the world's sea ice is in danger of completely disappearing as the effects of climate change continue to be felt.

While it is hard to estimate the size of the iceberg from the photograph, experts said it was likely over a mile (1.6 kilometers) in length. Brunt added that only about 10 percent of the iceberg's mass is visible, the rest being underwater.

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