I was a true believer in global warming from the late 1970s, until five years ago. From 1995-2008 I was splitting my time between Colorado, Northern California and The UK. Colorado and the UK both were in a period of dramatic warming, and it was completely obvious that it was due to CO2.
Something happened though in September, 2006. The weather turned cold and wet. I was coaching soccer in Colorado and it sucked. Every spring and fall soccer season since has been the same. Snow, wind, cold ….. Same thing in England – summers disappeared and winters got cold.
It quickly sank in that climate was cyclical, not linear. CO2 was accelerating upwards, but temperatures were getting colder. As a scientist and and engineer, I had to look elsewhere for answers.
What has surprised me is watching the spectacular dishonesty of the climate science community as this has unfolded. Previously I was under the impression that scientists were generally honest people, but now I have my doubts.