The IPCC term being developed radiative forcing or back radiation is not even measurable due to thermals and mixing and interactions between the troposphere and stratosphere. Only radiation, conduction, convection, and latent heat of vaporisation and condensation exist in thermodynamics heat transfer. The second law of thermodynamics heat transfer is irreversible from hotter object to cooler object. Warmed air mass is buoyant. Sensible heat flux, latent heat flux, lapse rates, low pressure, convection, clouds and rainfall are all cooling processes.