http://sofia.fhda.edu/gallery/geography/assignments/assignment02.html
A little googling gave me the hemispheric values. For forcing it's
only a graphic, but it ought to be around 200 W/m2, not below as I
thought.
For temperature, it's 13C for the Northern hemisphere and 6C for the
Southern hemisphere. The graphic of temperature change is quite
impressive, showing how substantial thermal inertia over the oceans
is.
So, I suppose, a step change in forcing of 1 W/m2 might indeed only
give a global jump of 0.1C within six months to a year, maybe it would
be 0.5C within 10 years, and 1C within 100 years.
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