Lopsided PDF and CMIP5 ensemble means

brandongates linked to this:

cmip3-52bvs2bobs

For 16 years everything stayed below the CMIP5 ensemble mean. What is that called? You have your about 95% and you stay in the lower half for that long. Think of a PDF. Better yet, think of the PDF changing with a regime change. Rotate it 180 degrees with the a regime change so it is now its former self’s mirror image. El Nino periods would then be out there in the long tail or when PDF has flipped.

Look at CMIP3 on the plot. In about 1998 the two CMIPs diverge. About 0.1 C is added to CMIP5. CMIP 3 provides much more reasonable and useful information.

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