There are an excellent series on climate models over at andymaypetrophysicist.com/category/climate-models
There are 7 issues on the models, that you will see as you scroll down the above link. They are: 1. What is a model, 2. Modeling Greenhouse Gases, 3. Solar Input, 4. Convection and atmospheric circulation, 5. Storminess, 6. WGII, and 7. WGIII