They also discuss some indications of higher aerosol cooling in the last decade, considered as a potential influence (although not dominant) in 21st century temperatures. (skepticalscience.com)
The only info I can find, including your posting above, talks about the general increase from about 1910 to 1945, followed by aerosol cooling until around 1975. (skepticalscience.com)
Another candidate is climate forcings other than CO2 such as aerosol cooling being smaller than expected. (skepticalscience.com)