posted at 00:50
Author Name:
Melt rate of Antarctica glaciers speeding up, research shows
Glaciers in the Amundsen Sea in West Antarctica are losing ice faster than another part of Antarctica and are the biggest contributor to rising sea levels, said researchers at the University of California at Irvine and NASA's Jet Propulsion Laboratory. Research published in May concluded that the melting of glaciers in West Antarctica, which contain enough water to raise sea levels by at least a meter, is speeding up and seems irreversible. The study is the first to assess and reconcile observations from four different measurement techniques so as to generate an authoritative estimate of the amount and the rate of loss over the last two decades, said the researchers. "The mass loss of these glaciers is increasing at an amazing rate," said scientist Isabella Velicogna, jointly of UCI and NASA's Jet Propulsion Laboratory. The total volume of ice lost since 1992 averages 83 gitatons per year. By comparison, the glaciers of Antarctica have melted the equivalent of Mount Everest every two years for the past 21. The melt rate of these glaciers has increased an average of 6.1 gigatons per year since 1992. From 2003 to 2009, when the four techniques were used simultaneously, the rate has risen 16.3 gigatons a year, nearly a tripling compared to the full 21 year period.

Posts Archive