Global Warming Images
 
Sea ice formerly covered millions of square miles of both the Arctic and Antarctic Oceans. In a warming world it is melting rapidly. This should be of great concern, as it is a valuable habitat for many marine mammals and organisms. In addition is is one of many feedback loops that accelerate climate change. Sea ice being white in colour had a high albedo, i.e. it reflects a lot of the suns energy back into space. When it melts and is replaced by sea water, which is much darker in colour and has a much lower albedo, more of the suns energy is absorbed, accelerating the warming, and further accelerating the melting of the remaining sea ice.
Sea Ice