And the predictions were often based on signs so subtle — getting a B - rather than a B
+ in a particular course — that a human might never have noticed.
Not exact matches
So I imagine many «skeptics»
in the late 1980s were aware that a cyclical upswing was on the cards (
in particular, we now know of
course that the AMO turned strongly
+ ve into the 90s)
Mostly, it is because the forcings
in the past (prior to the satellite era) are much more poorly constrained (aerosols
+ solar
in particular)- so the attribution of the ~ 0.75 warming so far is more tricky than calculating the estimated change
in temperature
in the future (which of
course assumes some GHG trajectory).»