UW Today

Ian Joughin


May 12, 2014

West Antarctic Ice Sheet collapse is under way

ice

The collapse of the West Antarctic Ice Sheet has begun, according to computer models using detailed topographic maps. The fast-moving Thwaites Glacier will likely disappear in a matter of centuries, researchers say, raising sea level by nearly 2 feet.


February 3, 2014

Greenland’s fastest glacier sets new speed record

floating iceberg

Observations of Jakobshavn Glacier from 2012 and 2013 show the fast-moving glacier has set new records for the speed of ice flowing toward the ocean.


November 29, 2012

International study provides more solid measure of shrinking in polar ice sheets

Channel through glacier

Climatologists have reconciled their measurements of ice loss in Antarctica and Greenland during the past two decades. A second article looks at how to monitor and understand accelerating losses from the planet’s two largest continental ice sheets.


May 3, 2012

Increasing speed of Greenland glaciers gives new insight for rising sea level

These icebergs recently calved from the front of the north branch of Jakobshavn Isbrae, a large outlet glacier that drains 6.5 percent of the Greenland ice sheet. The fact that they are upright, indicated by their dirty and crevassed surfaces, suggests they calved from the floating end of a glacier.

Changes in the speed that ice travels in more than 200 outlet glaciers indicates that Greenland’s contribution to rising sea level in the 21st century might be significantly less than the upper limits some scientists thought possible, a new study shows.


April 17, 2008

While stability far from assured, Greenland perhaps not headed down too slippery a slope

In a pair of companion papers in Science Express this week, scientists investigate the role of surface meltwater on accelerating the flow of the Greenland Ice Sheet and outlet glaciers and conclude that, while surface melt plays a substantial role in ice sheet dynamics, it may not produce large instabilities.


February 13, 2007

Glaciers not on simple, upward trend of melting

Two of Greenland’s largest glaciers shrank dramatically and dumped twice as much ice into the sea during a period of less than a year between 2004 and 2005.


March 23, 2006

Greenland’s glaciers pick up pace in surge toward the sea

With warming temperatures as the possible underlying cause, scientists wonder what is pushing Greenland’s glaciers out to sea as much as 50 percent quicker than before.


December 2, 2004

World’s fastest glacier doubles speed

The world’s fastest glacier, Greenland’s Jakobshavn Isbrae, doubled its speed between 1997 and 2003.