A more relevant question is who cares what Trenberth thinks? Even the consensus climate scientists who have studied and published on this topic, i.e., such as Santer and Von Storch, have already concluded models are inconsistent with observations for the 21st century.
Real Science 
And we know “speed ups” last 20 years . . .
How would Tragedy Trenberth know how long a “slow down” can last? Is he divine?
No, Oblarny is divine. Trenberth is merely his high priest. Hansen is the water carrier
Mutually exclusive outcomes can be synonymous in the cult of Gaia, but only if we say so, and until we say otherwise. Excelsior!
Maybe they meant to say an acceleration to the downside?
So in four more years Trenberth turns into a toad?
A more relevant question is who cares what Trenberth thinks? Even the consensus climate scientists who have studied and published on this topic, i.e., such as Santer and Von Storch, have already concluded models are inconsistent with observations for the 21st century.
Fuzzy math, the Common Core kind.