Greenland to lose more ice this year

Washington, Dec 16: As a result of global warming the Greenland's ice glaciers are losing nearly three times ice this year as compared to last year, scientists determined.

According to Jason Box, an Associate Professor of geography at Ohio State University, the loss of ice since the year 2000 is 355.4 square miles (920.5 square kilometers), or more than 10 times the size of Manhattan.

"We now know that the climate doesn't have to warm any more for Greenland to continue losing ice," Box said. "It has probably passed the point where it could maintain the mass of ice that we remember," he added.

"But that doesn't mean that Greenland's ice will all disappear. It's likely that it will probably adjust to a new 'equilibrium'. But before it reaches the equilibrium, it will shed a lot more ice," he further added.

Box and his research team has been monitoring satellite images of Greenland to gauge just how much ice flows from landlocked glaciers towards the ocean to form floating ice shelves.

Eventually, large pieces of these ice shelves will break off into the sea, speeding up the flow of more glacial ice to add to the shelves.

Warming of the climate around Greenland is believed to have added to the increased flow of ice outward from the mainland via these huge glaciers.

"We know that snowfall rates have increased recently in this region," Box said. "But that hasn't been enough to compensate for the increased melt rate of the ice that we're seeing now," he added.

Using daily images from instruments called MODIS (Moderate Resolution Imaging Spectroradiometer) aboard two of NASA's satellites, Box and his team are able to monitor changes in 32 of the largest glaciers along Greenland's coast.

They determined that during the summer of 2006-2007, the floating ice shelves at the seaward end of those glaciers had diminished by 24.29 square miles (62.9 square kilometers).

But, one year later, in the summer of 2007-2008, the ice loss had nearly tripled to nearly 71 square miles (183.8 square kilometers).

Much of this additional loss is from a single large floating ice tongue called the Petermann glacier.

ANI