[lepton]

The global warming party line is that they certainly have taken into account the very slight change in solar energy output

But they assume it is negligible. The first papers using the real figures were out last year - which show A) That the direct solar affect is between 10% and 40% of observed, and B) that they don't have long enough of a datastring (barely 2 solar half-cycles) to say that with much confidence.

[megatherium]

One intriguing theory is that the Little Ice Age was tied to the Maunder Minimum, the extended period in the 17th and 18th centuries where there were few sun spots (and solar output was less). So skepticism that solar output is not significant in climate change is indeed warranted.