Steven's PDF statement is quite short. The first paragraph never seems to get quoted in full. Why? Because he admits that his findings are low for aerosols. At the extreme edge of the (edit-IPCC) range.
Show me a model run that uses Steven's aerosol value for input and you will find that it gives a much lower estimate for increasing temperatures.
Since you've already done the model run why don't you show us?
here is one graph out of many similar ones. all models use a variation of inputs to get their own set of hindcasts and forecasts. I am saying that the model runs that show the least warming are the ones with the lowest coded in climate sensitivity for 2xCO2.
I will concede that my previos post was incorrect. any model that uses lower aerosols instead of the IPCC estimate will actually give
higher temps because there isless of a downward correction. if some of the models already had a smaller built-in correction factor for aerosols, then reducing the aerosol value to Steven's findings will still increase the temp prediction, but less than other models that need higher aerosol values to cancel out other built in feedbacks.
that is still garbled. suffice it to say a climate model's sensitivity is calculated by positive forcings minus negative forcings. if you reduce the negative forcings you get increaded temperatures. if you hold the temperatures the same then the climate sensitivity goes down. pick your poison. either the models get farther out of whack with reality or you reduce the estimate of climate sensitivity.