The idea that substituting air temperature for
SST over the open ocean makes a significant difference to the GMST trend is not supported by observational evidence.
Paul, it is global SAT, but I'm pretty sure that using
SST over the open ocean wouldn't have changed it non-negligibly (though I haven't actually checked).
Not exact matches
Nor is there good observational evidence that air
over the
open ocean warms faster than
SST.
The paper REA16 primarily cite to support faster warming of tas
over open water than
SST, [6] which is also model - based, attributes this effect to the thermal inertia of the
ocean causing a lag in
ocean warming.