tagged w/ ice sheet
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Scientists have seen once again just how dynamic a place the underside of the Antarctic ice sheet can be.Survey data collected from the middle of the White Continent shows liquid water is being frozen on to the bottom of the sheet in huge quantities.
link :http://www.bbc.co.uk/news/science-environment-12619342Scientists have seen once again just how dynamic a place the underside of the... more
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Over the last decade or so, scientists have tracked a significant loss of ice from the Greenland Ice Sheet (GIS). While some of that loss has been as a direct result of surface melting, most of it presently appears to be a result of warmer ocean waters melting the ice tongues that stretch out into fjords. Essentially, the warmer water melts the bottom of the glacier and makes it more likely to break up, and as the ice tongue breaks up, the glacier behind the tongue starts to move faster, dumping yet more ice into the ocean.
There has been a significant amount of study of the GIS, and multiple independent lines of evidence have shown that Greenland’s glaciers are thinning and thus losing mass. These include satellite radar altimetry, the GRACE gravity mapping satellites, and both airborne and satellite laser altimetry. Now a peer-reviewed paper published in March shows that another analysis of GRACE and new GPS data has found that mass loss has spread from the warmer southeast coast to the comparably cooler northwest coast, significantly increasing the amount of Greenland coastline affected by mass loss.
More at the link.Over the last decade or so, scientists have tracked a significant loss of ice from the... more
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Climate Change is affecting us all, but it's often tricky to calculate just how. Native American Communities in Alaska are providing important information that helps Scientists downscale climate change models, giving us a clearer picture of how changes will impact specific locations. This marriage of traditional Native American knowledge and academic research is benefiting us all.Climate Change is affecting us all, but it's often tricky to calculate just how.... more
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This 20 minute video explains how ice cores and climate models are used to predict future climate. No warm and fuzzies, just the science. Travel with a scientist from his field site in Antarctica where ancient ice is collected, to the labs where measurements are made to determine how greenhouse gases change climate, to the computer facilities used to predict future climate.This 20 minute video explains how ice cores and climate models are used to predict... more
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Greenland's ice sheet is melting at an alarming rate, in an effort to live up to its nameGreenland's ice sheet is melting at an alarming rate, in an effort to live up to... more
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