Here is a highly informative set of climate data with maps, model projections, probabilities, and explanations for policymakers:
Highlights of the IPCC Working Group I state-of-the-science report, February 2, 2007:
The likelihood that humans are responsible for the [global] warming increased from 66% in the last assessment, which was released in 2001, to 90%.
Working group I included more than 600 authors from 40 countries and 600 reviewers.
Warming of the planet is now unequivocal, as evidenced from observations of rising ocean and land temperatures, widespread melting of snow and ice, and rising sea level, as well as paleoclimate evidence.
A "middle of the road" future scenario predicts that the subtropics will become dryer while the higher lattitudes would receive more precipitation.
Even if humans were to stabilize greenhouse gas emissions, warming and sea level rise would be expected to continue for centuries.
The evidence of human influence on climate change is on the table and we no longer have to debate that part of it.