The more conventional pure reductionist radiative model approach (Sloan and Wolfendale 2013; Manabe and Möller 1961) is unable to explain a lack of warming in the presence of increased GHGs unless additional factors are included such as natural variations (Easterling and Wehner 2009). (link.springer.com)
Here we present a joint hydrodynamic and radiative model showing that during the first seconds of beam injection the effects caused by beam electrons can reproduce Hα line profiles with large red - shifts closely matching those observed in a C1.5 flare by the Swedish Solar Telescope. (uksolphys.org)
There can not be stratospheric cooling in a grey atmosphere with more CO2 (neglecting upper level solar absorption), but in more realistic radiative models (with a window region around 10 um) this phenomena can emerge from increased opacity (And shielding of radiation into the stratosphere) in the 15 um spectral region and increase in the 10 um flux from the ground as the surface is made warmer. (realclimate.org)