The cloud feedback remains the most uncertain radiative feedback in climate models. (fabiusmaximus.com)
It's not quantitative for several reasons (ocean heat uptake, the dependence of radiative feedbacks on the spatial structure of the SST changes, etc). (gfdl.noaa.gov)
Acting as a safety valve of sorts, this response creates a negative radiative feedback that allows more of the accumulating heat to be released into space through the top of the atmosphere. (sciencedaily.com)