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Tag:

glaciers

Northeast Greenland Glaciers Are Now Melting Rapidly, Study Finds

Northeast Greenland Glaciers Are Now Melting Rapidly, Study Finds

written by Yale Environment 360

The glaciers of northeast Greenland, long thought to be the most stable part of the massive Greenland ice sheet, are melting at an accelerating pace, losing roughly 10 billion tons of ice annually for the past decade, say researchers from the U.S. and Denmark.

The finding will likely boost estimates of global sea level rise, which had previously not accounted for massive ice loss from that region, scientists say. The Zachariae ice stream in northeast Greenland, which drains 16 percent of the ice sheet, has retreated roughly 12.4 miles during the past decade, outpacing the fast-moving Jakobshavn glacier, which has retreated 21.7 miles over the last 150 years.

Greenland-ice-map

Ice loss from the region is likely accelerating, the researchers say, because ice dams in nearby bays that had been blocking the glaciers’ paths are now also melting, freeing the way for them to flow into the ocean. “Northeast Greenland is very cold — it used to be considered the last stable part of the Greenland ice sheet,” explained the lead researcher of the report, which was published in Nature Climate Change. “This study shows that ice loss in the northeast is now accelerating. So, now it seems that all of the margins of the Greenland ice sheet are unstable.” Other recent studies had estimated more moderate ice loss from Greenland’s northeast.



March 18, 2014 0 comment
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Glaciers on Everest Disappearing as Temperatures Rise, Snowfall Declines

written by Yale Environment 360

The glaciers on Mount Everest and the surrounding region have shrunk by 13 percent in the last five decades as temperatures have risen and snowfall has declined in that section of the Himalaya, according to a new study.

Using satellite imagery and topographic maps, a

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May 16, 2013 0 comment
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Earth-Observing Satellite Is Launched by NASA at Crucial Moment

written by Yale Environment 360

NASA is expected to launch this week its newest Earth-observing satellite, Landsat 8, at a time when previous Landsat satellites have either stopped working or have developed serious technical problems.

NASA scientists say the launch of the $855 million satellite from Vandenberg Air Force Base in California

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February 12, 2013 0 comment
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Chasing Ice Opens in the UK

written by Walter Wang

The award-winning environmental film directed by James Balog opens today in the UK. Balog was skeptic about climate change but through his Extreme Ice Survey for National Geographic, he changes his mind in the face of undeniable evidence.

The director makes use of time-lapse cameras to

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December 17, 2012 0 comment
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U.S. Atlantic Coast Already Hotspot of Sea Level Rise, Study Says

written by Yale Environment 360

A 600-mile stretch of the U.S. East Coast is experiencing rates of sea level rise that are three to four times greater than the global average, according a new study.

In a new analysis, scientists at the U.S. Geological Survey (USGS) found that sea levels from Boston, Mass. to Cape Hatteras, N.C. have risen 2 to 3.7

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June 26, 2012 0 comment
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Methane Sources Found Bubbling Up from Melting Ice Caps

written by Yale Environment 360

U.S. scientists report that they have discovered new sources of methane percolating up from underground reservoirs as glaciers, ice caps, and permafrost melt in the Arctic.

University of Alaska researchers, conducting aerial and ground surveys, said they have discovered

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May 22, 2012 0 comment
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Ice Sheets In Greenland and Antarctica Melting Much Faster than Predicted

written by Walter Wang

According to a new NASA-funded study, Greenland and Antarctic ice sheets are losing mass at a much faster rate than previous model forecasts have predicted. The study, the longest of its kind—almost 20 years—used satellites to measure changes in polar ice sheet mass. Results suggest that the ice sheets, found only in Antarctica and Greenland, are melting

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March 17, 2011 0 comment
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