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Nasa says "Iceberg twice as big as New York" intends to break away from Antarctica



Iceberg is twice as large as New York, intends to break away from the Antarctic Brant-ice shelf, which is a source of concern for scientists in the region.

In the release, Nasa says the crack increased at a speed of about 2.5 miles (4 km) per year from 2012, and that the gap was calm by that time. This growing north crater could soon encounter another growing gap, the so-called "Halloween crack", which was discovered in October 2016 and rose east of McDonald's Ice Rumples.


A NASA scientist, Chris Schumann, told The Independent that the size of the iceberg – about 1700 square kilometers, or about 656 square miles – will make it the world's largest iceberg, which is now Tracked by the National Ice Center in Suitland Maryland.

"What is the driving force behind this natural, long-term flow of ice-free ice from the Antarctica, so that ice moves along the sea (in this case, the Waddell Sea, forming the Brant ice shelf)," said Mr. Schumann. "Year by year, ice moves further from the coast, as glaciers are supplied inside, while the forces of tides, currents, storms, etc. … will not begin to crack with floating ice. "
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If these cracks merge, then the ice shelf may become "destabilized," said Joe McGregor, a glaciologist at NASA's Space Flight Centers.

"The near future of the Scottish Shelf is likely to depend on where there are existing rifts to McDonald Ice Rumples," said Joe McGregor in a statement. "If they merge up (southward) from McDonald Ice Rumples , it is possible that the ice shelf will be destabilized. "


The discovery that a large iceberg can break away from the continent was a source of concern for researchers at the British Antarctic Service, the Halley Station, which is the main base that normally operates year round. The database has been rebuilt and moved earlier, not The confidence in the ice has already led to the fact that the station has been closed twice in recent years.

Nasa notes that the calving – when the ice breaks from the edge of the glacier – is a regular phenomenon, but that the changes observed in recent times are not regular for ice shelf.


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"We do not have a clear idea of ​​what drives the shelf advancing and retreats through calving," NASA glaciologist Chris Schumann said. "The probable future loss of ice on the other side of the Halloween crack suggests that there may be greater instability associated with the risk of" operating base "on the shelf


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