It still is an impression of mine, but I agree that I do not have much foundation for it. However, there is  another valid point.

Eeer... When did climate modeling cease being physics?

In my neck of the university woods climate modelling is related to meterology, which is related to earth sciences (geology and such). Why I do not know, but probably some historical reasons. Which means that climate modeling may use physicis but is not in the physics sciences club, it is instead over there with the weathermen and the stone lovers. If this is a general phenomena (as I presumed) or not is an open and possibly interesting question.

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