This is academic and a bit “heavy-duty” admittedly, but the most basic analysis from physics accords with the inevitability of the carbon/climate link. This is work by myself and a good friend and scientific collaborator, Alexander Koewius. Essentially, even without highly complex computational models, basic physics “proves” that connection. How – precisely – the Earth systems will respond remains to be seen, but humans are undoubtedly undertaking a geo-engineering experiment of unprecedented scale, by elevating atmospheric carbon levels artificially. Who knows how a complex system might respond – e.g. “the butterfly effect”?
Global Warming as Seen from the Standpoint of Fundamental Physics and Chemistry.
An ongoing project by A.Koewius and C.J.Rhodes (translating from the German language into English): http://www.koewius.de/Website/Climate_Change.html