Fire Earth

Earth is fighting to stay alive. Mass dieoffs, triggered by anthropogenic assault and fallout of planetary defense systems offsetting the impact, could begin anytime!

Greenland Ice Sheet Losing Ice Mass

Posted by feww on March 24, 2010

Greenland Ice Sheet Losing Ice Mass on Northwest Coast: International Study

Greenland ice sheet lost about 1,604 km³ (385 cubic miles) of ice between April 2002 and February 2009, an amount equivalent to about 0.5 mm of sea-level rise each year, researchers say.

Greenland ice sheet has been losing an increasing amount of ice since 2000. Previously most of the loss was concentrated in its southern region, but now the loss is occurring in its northwest coast, a new international study says.


Click image to enlarge.


Greenland Melt Extent, 2005: Konrad Steffen and Russell Huff – Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado at Boulder

Researchers from Denmark Technical Institute’s National Space Institute in Copenhagen and the University of Colorado at Boulder say the ice-loss acceleration started moving up the northwest coast of Greenland in late 2005. “The team drew their conclusions by comparing data from NASA’s Gravity and Recovery Climate Experiment satellite system, or GRACE, with continuous GPS measurements made from long-term sites on bedrock on the edges of the ice sheet.”

The uplift rates of about 4 centimeters  were discovered close to the Thule Air Base on Greenland’s northwest coast between October 2005 to August 2009. “Although the low resolution of GRACE—a swath of about 155 miles, or 250 kilometers across—is not precise enough to pinpoint the source of the ice loss, the fact that the ice sheet is losing mass nearer to the ice sheet margins suggests the flows of Greenland outlet glaciers there are increasing in velocity, said the study authors.” The report said

“When we look at the monthly values from GRACE, the ice mass loss has been very dramatic along the northwest coast of Greenland,” said CU-Boulder physics Professor and study co-author John Wahr, also a fellow at CU-Boulder’s Cooperative Institute for Research in Environmental Sciences.

“This is a phenomenon that was undocumented before this study,” said Wahr. “Our speculation is that some of the big glaciers in this region are sliding downhill faster and dumping more ice in the ocean.”

“These changes on the Greenland ice sheet are happening fast, and we are definitely losing more ice mass than we had anticipated, ” said Isabella Velicogna of the University of California-Irvine, who also is a scientist at NASA’s Jet Propulsion Laboratory. “We also are seeing this ice mass loss trend in Antarctica, a sign that warming temperatures really are having an effect on ice in Earth’s cold regions.”

Click here for the rest of the report and a computer simulation of Greenland Ice Melt.

Related Links:

One Response to “Greenland Ice Sheet Losing Ice Mass”

  1. […] Greenland Ice Sheet Losing Ice Mass […]

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.