Posts tagged ‘Michel Mann’

Math Geek Humor

In his analysis of his hockey stick temperature reconstruction, Michel Mann claimed that his results were robust to changes in certain weighting factors.  Humorously, Steven McIntyre demonstrates that it is robust because when you do the math, the weighting factors actually cancel out of  all the equations.  In effect, Mann was saying that y =3x/x  gives the answer "3" robustly for all values of x (well, except zero).  True, but scientifically meaningless.  But worrisome when a scientist has to run numerous simulations to discover the fact.  I presume he thought his weighting factors were actually doing something in his model.

Reason #4163 to be really, really confident in those climate models these guys are building.