Not exact matches
Anyway, it's too soon to halt that campaign, and some
unknown individual (s) have already Pre-Ordered the audiobook, so I'll keep the ad
running a bit longer.
On further reflection I believe that in principle it doesn't matter how you measure uncertainty (I guess this is what you called bias for
individual runs), especially if the aforementioned kind of baseline is
unknown.
You're right, aerosols are the big
unknown in the 20th century changes in forcings, and the spread in
individual model
runs is large indeed (by the eye even larger than the spread in observed temperatures).