I assume average temperature of the oceans is 5 C, and the GMST is 15 C.
Not exact matches
Assuming a 10 degree
temperature difference between the
temperature of the runoff and the
average temperature of the
ocean that would be 5 * 10 ^ 18 cal or 2 * 10 ^ 19 J / yr.
By
assuming that the absolute value
of the «
average» surface
temperature common to both the atmosphere and
oceans is 4 - 5 C lower than the actual, there would be considerable error wouldn't there?
In the absence
of changes to other climate forcings and
assuming continued rise
of CO2 AGW would be falsified by falling / static
ocean heat content or falling / static global
average temperature.