Thursday July 08, 2010
High Above the Earth, Satellites Track Melting Ice
michael d. lemonick
e360
The surest sign of a warming Earth is the steady melting of its ice zones, from disappearing sea ice in the Arctic to shrinking glaciers worldwide. Now, scientists are using increasingly sophisticated satellite technology to measure the extent, thickness, and height of ice, assembling an essential picture of a planet in transition.
After carbon dioxide, the substance most crucial in determining how climate change will play out over the next century and beyond isn’t a greenhouse gas — it’s the solid state of the molecule H20.
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