That is from their “Business As-Usual Best Estimate” – of course the real world result is less than half of that.
I see Jo Nova drawing attention to warmist claims that predictions of IPCC 1990 are coming true – reported uncritically of course by the ABC.
Clive Best dealt well with this issue last year.

We must not forget that policymakers were herded to the Rio conference in 1992 and fed a pack of lies.
IPCC 1990 also predicted sea level rise would be twice what it has turned out to be.