Study confirms: Polar ice sheets are shrinking worldwide

• December 2, 2012
Arctic Ice Melt

Creative Commons: U.S. Geological Survey, 2012

The polar ice sheets are indeed shrinking—and fast, according to a comprehensive new study on climate change.

And the effects, according to an international team, are equally clear—sea levels are rising faster than predicted, which could bring about disastrous effects for people and wildlife.

Rising seas would increase the risk of catastrophic flooding like that caused by Hurricane Sandy last month in New York and New Jersey. Environmental damage may include widespread erosion, contamination of aquifers and crops, and harm to marine life. And in the long term, rising seas may force hundreds of millions of people who live along the coast to abandon their homes.

By reconciling nearly two decades of often conflicting satellite data into one format—in other words, comparing apples to apples—the new study, published in the journal Science, made a more confident estimate of what’s called ice sheet mass balance.

That refers to how much snow is deposited on an ice sheet versus how much is lost, either due to surface melting or ice breaking off glaciers.

Between 1992—when polar satellite measurements began—and 2011, the results show that all of the polar regions except for East Antarctica are losing ice, said study leader Andrew Shepherd, a professor of earth observation at the University of Leeds in the U.K.

Read more: National Geographic >>


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About the Author

Karl Burkart is the Digital Communications Director for the GCCA, the Global Call for Climate Action, and TckTckTck, a network of 400+ diverse organizations working around the world for greater action on the growing problem of climate change. Karl also blogs on technology and the environment for a variety of publications. You can follow him on Twitter @greendig.

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