Validation is a Process
Why has global warming paused? Water vapor may be in the answer. And here.
Contrary to what seems to be the general impression, radiative energy transport in complex interacting media is not a slam-dunk given. Until the numerical values of the dominant driving potential for the Earth’s climate systems are pinned down, the uncertainties in the response of the systems will continue to be large.
Models Methods Software 
Interesting post. With a twist of the wrist, I could knock out an Excel spreadsheet that does a monte-carlo analysis of the variation of the temperature of the earth considering random variations in the inputs. Let me know if you are interested.