This is a photograph of an illustration in the Weekend
Australian newspaper (August 22, 2007, Inquirer section, page 22) from an article
Arctic temperature variations over a 120 year period (as measured by scientists from
NASA and the US National and Atmospheric Administration) are superimposed :
I am sure you can form your own conclusion from that.
- on the left by Solar irradiance
- and on the right by the increase in CO2 levels