[djleni]

Yeah this stat is a bit confusing to me.

Does this imply in preindustrial times the net energy was 0, or is this total energy and there’s some number not mentioned of loss?

[PaulDavisThe1st]

My understanding (I'm not a climate scientist) is that yes, net energy was zero over the "right" period of time (i.e. incoming energy from the sun balanced energy lost by radiating to space).

The key technical term (IIUC) is "radiative forcing" https://en.wikipedia.org/wiki/Radiative_forcing