This is NOW the third MAJOR "positive feedback" mechanism of Solar Irradiance proposed that BLASTS the Global Circulation Models which only allow that 0.1% variation from the Sun's output.
The fool alarmists keep claiming that everything is understood, and that it is impossible that the Sun is responsible for the bulk of the warming despite such CLEAR historical data such as:
From Lassen linked here which points out that Solar Cycle length is HIGHLY correlated to temperature of Earth, which temperatures can NOT be explained by the CO2 hypothesis.
With this mechanism, the cosmic ray mechanism, and the negative feedback cloud mechanism proposed by Dr.Spencer (essentially meaning the climate models are confusing cause and effect), there are now three strong hypotheses to enhance the direct effect of solar radiation. None of these are included in current GCMs, and have the effect of invalidating all predictions previously made by these models.