 Frozen Earth
Ice covers 10 percent of Earth's surface and helps moderate the planet's temperature. Glaciers and ice sheets around the world are melting at an alarming rate. By keeping an eye on Earth's ice from space, NASA satellites help us understand the global effects of climate change.
Credit: NASA JPL
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 A Tour of the Cryosphere 2009
The cryosphere is Earth's solid water: snow, sea ice, glaciers, permafrost, ice sheets, and icebergs. Direct measurements can be difficult to obtain, so scientists use satellites to observe the cryosphere and to monitor changes.
Credit: NASA Scientific Visualization Studio
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 Sea Ice 2008
Arctic sea ice has shrunk dramatically in the last few decades. If recent trends in the melt rate continue, the Arctic Ocean could be ice free in the summer much sooner than previously thought.
Credit: NASA Scientific Visualization Studio
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 Operation Ice Bridge
IceBridge, a six-year NASA mission, is the largest airborne survey of Earth's polar ice ever flown. It will yield an unprecedented three-dimensional view of Arctic and Antarctic ice sheets, ice shelves and sea ice. These flights will provide a yearly, multi-instrument look at the behavior of the rapidly changing features of the Greenland and Antarctic ice.
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 Guided Tour of Antarctic Flyover
This guided tour of the area surrounding McMurdo Station in Antarctica uses the Landsat Image Mosaic of Antarctica (LIMA). It's a great way to experience the frozen continent without any risk of frostbite.
Credit: NASA Scientific Visualization Studio
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