I'll take a shot at the reliability of the evidence by pointing to what I beleive is the primary driver for climate shifts on this plant an dthe solar system in toto.
The Sun. Solar output is NOT constant as the IPCC models assume. There is a great deal more to solar energy than just measuring solar irradience as supporters of the IPCC seem to suggest. Some of the differences are solar wind and the varying intensity therof. Sunspots or lack thereof. examples, sunspot radiat a significantly higher percantatge ot Infra-red radiation over other wavelengths. The wavelengths radiated by sunspots are more redily converted to ehat when absobed by solid materials...
Below are some links show the correlation between solar activity and climatic shifts on planet earth.
2. Weather trend data linked to solar activity. This article references IPCC as well.
http://www.321gold.com/editorials/hoye/hoye040909.pdf
3. This link goes to a number of technical documents data etc detailing the correlation and likely causation between solar activity and the earths climate patterns.
http://www.isthereglobalcooling.com/
4. This report was presented at the International Conference on Climate Change. It is a detailed look at the solar cycle, its correlation to global climate patterns and predicts fairly dramatic cooling over the next decade.
http://www.warwickhughes.com/agri/Solar_Arch_NY_Mar2_08.pdf
5. This link is from some researchers at the University of Wisconsin who have made the first mathematical model that can predict with reasonable accuracy, climate trends. Based on their model, they show that Climate change is almost entirely natural. If you read the article you might get as I did, the impression that the scientists were surprised to learn that man has so little effect.
http://www.wisn.com/print/18935841/detail.html
8. Web site describing satellite data for looking at weather trends on the earth
http://science.nasa.gov/newhome/headlines/essd06oct97_1.htm
10. Article linking solar activity and earth’s climate. Article provides this link with a new computer model, but NASA still says greenhouse gases still supersede. Although another NASA article point out that the sun has been the most active in 1,000 years or more for the past 50 years…
http://earthobservatory.nasa.gov/Newsroom/view.php?old=200112065794
17. CERN CLOUD experiment proving relationship between solar magnetic field strength and cloud cover on earth.
http://wattsupwiththat.com/2011/08/24/breaking-news-cern-experiment-confirms-cosmic-rays-influence-climate-change/#more-45793
18. New study showing STRONG negative feedback for Clouds.
http://wattsupwiththat.com/2011/09/20/new-peer-reviewed-paper-clouds-have-large-negative-feedback-cooling-effect-on-earths-radiation-budget/#more-47761
19. Variable Solar Dynamo – solar Flux fields are degrading no more sunspots are possible after 2015 if this does not reverse.
http://www.cdejager.com/wp-content/uploads/2008/09/2010-Variable-solar-dynamo3.pdf
20. Three studies on solar physics – Fading sunspots
http://www.space.com/11960-fading-sunspots-slower-solar-activity-solar-cycle.html
I hope you find this useful