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In other words, the jury is still out, but the evidence so far indicates that Mizz Paglia is quite correct.
We study the solar impact on 400 years of a global surface temperature record since 1600. This period includes the pre-industrial era (roughly 1600–1800 or 1600–1900), when negligible amount of anthropogenic-added climate forcing was present and the sun realistically was the only climate force affecting climate on a secular scale, and the industrial era (roughly since 1800–1900), when anthropogenic-added climate forcing has been present in some degree.... We find good correspondence between global temperature and solar induced temperature curves during the pre-industrial period such as the cooling periods occurring during the Maunder Minimum (1645–1715) and the Dalton Minimum (1795–1825). The sun might have contributed approximately 50% of the observed global warming since 1900.... In any case, as some authors have already noted, solar change effects are greater than what can be explained by several climate models.
--N. Scafetta and B. J. West, Geophys. Res. Lett., 33, 15 September 2006
Nota bene: This is not conclusive PROOF of anything. ALL the climate theories are THEORIES.
