Saying that climate scientists should qualify their findings using risk & mitigation models is like telling an olympic athlete that they should train if they want to win gold. Not only do they know, not only have they been doing it all along, but they have invested such monumental effort in doing an extraordinarily good job of it all along that the fact that you aren't aware is depressing. Doubly so because, in contrast to athletics, the point of the exercise wasn't to win a contest but rather to achieve the very public awareness that, evidently, they haven't.