Thanks to BG, we have a screen capture of the solar graph from the silly “Swindle” prog; I’ve inlined it. Now this is nice, because it says S+C as source. Which means we can look-up the ever useful Damon and Laut. First off, notice that the data plotted *isn’t* solar variation directly, but an index of solar cycle length. There was speculation that it might be related to solar variation, but this was never clear. Now notice that the solar graph stops in 1980. Why could that be? Look at D+L’s figure 1c: when the correct data is used, the upturn after 1980 disappears and the correlation with temperature disappears. Oops. Best not mentioned…
D+L also say (of the ): Also, the article published in 1995 by Lassen and Friis-Christensen, investigating the possible correlation of solar activity and terrestrial temperatures over the extended period of four centuries, contains unacceptable data procedures [Laut, 2003].
[Update: B points out (I’d noticed this too…): 400 years of T-solar activity… is sourced to “Svensmark and Chistensen” for some reason, but is almost identical to Fig. 6(a) of Laut, which reproduces a graph from Lassen and Friis-Christenen (1995). However note that on the prog’s graph the red line, plotting solar cycle length, is continuous and agrees spectacularly well with T between 1600 and 1700. This portion of the graph is missing from Laut, and for good reason, since this is the time of the Maunder minimum. Bit tricky measuring a solar cycle length when there are no sunspots! I don’t have ready access to the Lassen/Friis-Christensen paper, but this seems to be the relevant graph. Again, no solar data between 1600 and 1700. Interesting!
Yes indeed. It looks like the prog has filled in the missing bits from the temperature graph :-) -W]