I can't recall anyone thinking of a +20K warmup. A warmup to 20°C, from the roughly 15°C average Holocene temp, is possible, if only in one of the Bad End scenarios. If that doesn't sound too bad, remember that this includes night as well. Just five degrees in 100 years is pretty apocalyptic, insofar as we don't have fossil records of temperature swings that fast outside of global disasters.
Also there's that phrase, "the future is already here, it's just unevenly distributed". There are going to be places that get 10K of warming. There are going to be places that get 0 warming, or slight cooling. For large parts of Canada and Siberia, I'd say 10K warming is more likely than not.
-- ∇×V
Also there's that phrase, "the future is already here, it's just unevenly distributed". There are going to be places that get 10K of warming. There are going to be places that get 0 warming, or slight cooling. For large parts of Canada and Siberia, I'd say 10K warming is more likely than not.
-- ∇×V