Once again we see the simplistic nature of these studies which are only interested in total solar irradiation. The 'solar activity' to which I have previously referred is the high-energy particles which together with cosmic radiation have an observed effect on our climate. The research at CERN is part of a programme attempting to determine the mechanisms by which this could occur. At present, because no known mechanism has been identified it can, of course, not be included in any climate model. If you have the time it is worth sitting through at least the first part of the lecture given by Kirkby at CERN. I have posted the link above.