An ice shelf that is wrenching itself away from Antarctica is a symptom of global warming and will have further environmental consequences, according to a New Zealand scientist.
A satellite picture showed that a 40-kilometer-long strip of ice believed to pin the Wilkins Ice Shelf in place has snapped at its narrowest point, off the Antarctic Peninsula.
Professor Tim Naish from the Antarctic Research Center at Victoria University in Wellington said it was the ice sheets behind the ice shelf that concern him and other scientists, Radio New Zealand reported on Monday.
The ice bridge had held a vast Antarctic ice shelf in place for hundreds of years.
Naish said the shelf measures about 14,000 square kilometers and as the ice shelves melt, the ice sheets start sliding faster into the ocean.
Researchers regarded the ice bridge as an important barrier to holding the remnant shelf structure in place.
Scientists said the collapse provides further evidence or rapid change in the region.
The loss of the ice bridge, which was almost 100 kilometers wide in 1950, could allow ocean currents to wash away more of the shelf.
Temperatures on the Antarctic Peninsula have risen by up to about 3 degrees Celsius in the past 50 years, the fastest rate of warming in the Southern Hemisphere.
Nine other shelves have receded or collapsed around the Antarctic Peninsula in the past 50 years.
Fossil Fuel
TheTeam
