The decisive evidence is well displayed in the voluminous volumes (!) of the IPCC reports which reviews 1000s of published literature that is in the public domain. Even if you don't go with the assessment conclusions of the IPCC authors (I do), the evidence is all there -- if nothing else, just go read the summary for policy makers (SPM) for working group 1 (from www.ipcc.ch), all the summary material is traceable back through the main volume to individual published peer reviewed literature. It merely requires one to read for oneself, and not take the word of a blogger. By contrast, the type of data being discussed here is just a minutia of the full body of evidence.