The denialists have leaked the draft IPCC report, again. There are some self-serving lies at WUWT about exactly why it was OK to break the confidentiality agreement, but given that any old fool can sign up to be an “expert reviewer” and many do, and that the denialists are self-serving liars, leaking of the report was only to be expected. Which makes a farce of trying to keep it private. The only solution is for the IPCC to stop pretending it isn’t going to be leaked, and make the draft report publically available with the words “draft” stamped on it in nice big letters.
While they’re doing that they should rename the “expert reviewer” category to just “reviewer”, or perhaps just remove it entirely. Certainly at the moment there is no quality control at all over the expertness of the reviewer.
As you’d expect, WUWT has got the substance wrong; see Skeptical Science.
More interesting is “World avoided” simulations with the Whole Atmosphere Community Climate Model (ppt): We use the Whole Atmosphere Community Climate Model, coupled to a deep ocean model, to investigate the impact of continued growth of halogenated ozone depleting substances (ODS) in the absence of the Montreal Protocol. We confirm the previously reported result that the growth of ODS leads to a global collapse of the ozone layer in mid-21st century, with column amounts falling to 100 DU or less at all latitudes.