Thanks for the image fix. The belief that CO2 levels are the significant driving factor for global temperature trends also requires an explanation for why the temperatures fell during the 1950’s while CO2 levels were rising. From what I have read, their explanation involves aerosol and particulate pollutants that were released during that time frame. The belief that solar activity is the significant driving factor for global temperature trends requires no other qualification. It is the best fit. Just look at that chart. Solar activity was the leading factor determining arctic air temperature trends.
What data type is the “solar activity” data shown in the figure? Possibilities are sunspot number, solar cycle length, estimated solar irradiance, or something else.