Global warming trends are not coupled to atmospheric CO2.

Check this:

[1] ICECAP
Mar 02, 2011

“Scientists” Pull a Snow Job on Reporters in Teleconference
By Joseph D’Aleo, CCM, AMS Fellow

The article states, amongst many other interesting facts,

….Many questions still remain to be answered, but these changes in ocean circulation may be important keys for understanding the observed loss of Arctic sea ice.”

CO2 has nothing at all to do with it. Cold open arctic waters serve as a major sink of CO2 just as the warm tropical waters serve as a source.  Roger Pielke Sr. suggests the ocean heat content (OHC) as a more robust measure of temperature trends. Models suggest OHC should be rising rapidly as the greenhouse gases build, especially in the tropics. Here is the buoy based OHC in the top 300 meters of the equatorial from NOAA (between 5 degrees north and south of the equator) Pacific from 130 E to 80W. During El Niños, the eastern half is warm and the west cool, in La Niñas the eastern half is cool and the western warm. The fact there is not net warming, instead actually a slight cooling of the entire belt may the most damning proof that global warming is nothing more than a government funded political campaign.

Read the whole article at [2] http://www.icecap.us/.