Bear in mind that the author, Roy Spencer:
* has a Ph.D. in meteorology, which is not the same as climatology
* believes that most climate change is natural in origin
* is a Creationist: "I came to the realization that intelligent design, as a theory of origins, is no more religious, and no less scientific, than evolutionism"
This doesn't mean his article is wrong. I don't have enough technical knowledge to pick it apart. Just beware that the article might be biased.