On December 5, 2009, I wrote this post demonstrating that it is soot, not 'global warming' (or any warming for that matter) that has caused the recent ice melt in the Arctic.
The scientific evidence continues to build demonstrating that soot is indeed the problem.
Hat tip: Watts Up With That.
There is an important point here: We need to correctly assign causes and effects. We can reduce carbon dioxide all we want and it will make no difference if the problem is soot.
UPDATE: Here is a graph of Arctic temperatures from the Danish Meteorological Institute with data as of yesterday to clarify the point of this posting and the comment from Van, below. The red line is the temperature. The green line is the "normal" temperature and the blue line is the melting point of ice (273°K = 32°F). Temperatures this summer are well below normal but ice is less than normal. The reason is soot melting the ice as indicated above.