Greenland, Antarctic Ice Is Melting Faster
Collision Calves Iceberg from Mertz Glacier Tongue, Antarctica by NASA Goddard Photo and Video
License (according to Flickr): Attribution License
License (according to Flickr): Attribution License
Superstorm Sandy sparked a lot of interest in rising sea levels when it swept across the Northeast last month and flooded parts of the coast. Over the next century, more water — and higher sea levels — could come from melting ice in Greenland and Antarctica. How much has been unclear. But now scientists have developed a much clearer view of how quickly that ice has been melting over the past two decades. And that will help researchers forecast the rate of sea-level rise in the years to come. There's enough ice sitting on Greenland and Antarctica to drive up sea level catastrophically — by more than 200 feet. Thankfully, nobody expects it all to melt. But over the past two decades, scientists have been struggling to understand just what has been happening on those ice sheets, using primarily satellite-based instruments.
Keywords:
ice sea level ice sheets Antarctica deeply incised melt incised melt channel large melt lake ice sheet feet Greenland sea-level rise different techniques sea levels water Ian Joughin/Science/AAAS higher sea levels scientists giant ice sheets primarily satellite-based instruments one-meter sea level fast ice flow additional sea-level rise New York City biggest wild card once-in-a-century storm surge Climate Impact Research melt rates glaciers decades Ian Joughin ice shelves clearer view Shepherd parts Superstorm Sandy tricky business giant glaciers 1-meter rise warm seawater 10 feet warmer air huge glaciers time period tiny changes technique measures Science magazine mountain glaciers Stefan Rahmstorf ever-warming seawater Andy ShepherdPeople:
Ian Joughin
Overall Sentiment: 0
Relevance: 0.507
| Sentiment | Quote |
|---|---|
| -0.0399355 | "Unfortunately, there's a lot we still don't understand about the various processes that are controlling the fast ice flow, and how fast icebergs are discharged to the ocean," Joughin says. ... |
| 0 | "In Antarctica, this is really most of the melting that goes on," Joughin says. ... |
| 0.356847 | "In Antarctica, this is really most of the melting that goes on," Joughin says. "And as climate warms and more warm water comes in contact with these ice shelves, it tends to thin them and potentially break them up." |
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Andy Shepherd
Overall Sentiment: -0.0758156
Relevance: 0.423703
| Sentiment | Quote |
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| 0 | "There are three different techniques," says Andy Shepherd ... |
| 0.0900436 | "There are three different techniques," says Andy Shepherd at the University of Leeds in the U.K. "The oldest is called altimetry. It's the same sort of instrument an airplane carries to tell how high it is above the ground." |
| -0.0846663 | "It wasn't clear because of the uncertainty of the data whether the ice sheet was growing or shrinking," Shepherd says. ... |
| -0.0167746 | "It wasn't clear because of the uncertainty of the data whether the ice sheet was growing or shrinking," Shepherd says. "And now we're able to say with confidence, over all that time period, that it was shrinking." |
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Ian Joughin/Science/AAAS
Overall Sentiment: 0.0287805
Relevance: 0.311246
Superstorm Sandy
Overall Sentiment: 0.0800737
Relevance: 0.292725
Stefan Rahmstorf
Overall Sentiment: 0
Relevance: 0.263871
| Sentiment | Quote |
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| 0.110204 | "What today is a once-in-a-century storm surge event in New York City would happen every three years if you had a 1-meter rise in sea level," says Stefan Rahmstorf ... |
| 0.110204 | "What today is a once-in-a-century storm surge event in New York City would happen every three years if you had a 1-meter rise in sea level," says Stefan Rahmstorf at the Potsdam Institute for Climate Impact Research near Berlin. "So a one-meter sea level rise is huge." |
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Additional Info:
Continent: Antarctica
Overall Sentiment: -0.0483906
Relevance: 0.768451
Country: Greenland
Overall Sentiment: -0.0487235
Relevance: 0.621172
Disambiguation: Location | GeographicFeature | GovernmentalJurisdiction | IslandReferences:
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Greenland, Antarctic Ice Is Melting Faster
Site Provided Desc:
The good news: Sea level has risen by just a half-inch in the past 20 years as a result of shrinking ice. The bad news: The melting is now speeding up. Over the next century, this could contribute to another two to three foot rise in sea level — enough to flood New York City every few years.
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