The Arctic Meltdown

Arctic Sea Ice in Summer 2005 (1/14)

Satellites have observed Arctic ice since 1978. Sea ice decline is likely to affect future temperatures in the region.

Because it is white or light in color, sea ice reflects much of the sun’s radiation back into space, whereas dark ocean water absorbs more of the sun’s energy. The increased absorption of energy further warms the planet. (Graphic: Reuters)