Describe your documentation update
In this example for the spatial average, variable tas is used for deriving Nino 3.4 index. However in CMIP, the variable name tas has been indicating near surface (2-m) temperature, I think it would make more sense to use ts variable instead, which is for surface temperature (thus considered as sea-surface temperature over ocean).
I suggest replacing tas by ts.
Describe your documentation update
In this example for the spatial average, variable
tasis used for deriving Nino 3.4 index. However in CMIP, the variable nametashas been indicating near surface (2-m) temperature, I think it would make more sense to usetsvariable instead, which is for surface temperature (thus considered as sea-surface temperature over ocean).I suggest replacing
tasbyts.