The best word to describe IPCC AR5 is 'strange'.
With regard to the Sun, one chapter says it has no effect on global climate at all, while another says that it is responsible for the recent lack of warming.
Of particular interest is the apparent failure of the model projections to match reality, since they show continually increasing temperatures MUST happen if CO2 rises. Oddly, the last draft of AR5 shows this issue illustrated in graphical form with the model predictions running way higher than observations - the just released Final Draft shows a graph with the same data, but this time the model projections DO fit reality.
Statisticians are currently wondering how this apparent miracle was achieved - it looks as if some undocumented changes have been made at the last minute to the papers which were accepted by the IPCC. But not by the original authors....??