I'm also a physicist by training, though I work in industry, and as I said, I do think they should give you their code. Would you mind answering the other points I brought up, and making clear whether you doubt that the greenhouse effect exists and the warming caused by it is anthropogenic, or whether you are simply dubious of specific predictions about how its effects will propagate in a complex system? If it's the first, please address the standard derivation of the greenhouse effect from statistical physics and the spectral measurements confirming it (and, while you're at it, why Venus is hotter than Mercury). If it's the second, you should probably make that clear, otherwise people will see a statement like "it's entirely appropriate to question man made global warming." and reasonably assume it's the first, given the general level of raging idiocy surrounding this question in the public discourse.
Edit: Just to head off nitpicking, I'm aware that not all of the warming we experience due to the greenhouse effect is anthropogenic, only that due to the additional greenhouse gasses we release, and any others which might increase in concentration as a result of that increase in temperature.