As for man - made aerosols, 2 facts aid the interpretation of the limits of aerosol change in the 1910 to 1945 period. (skepticalscience.com)
Moreover, aerosols adjust rapidly to a changing climate, so it is logical to include natural aerosol changes in the category of fast feedbacks. (skepticalscience.com)
Near - global satellite aerosol data imply a negative radiative forcing due to stratospheric aerosol changes over this period of about — 0.1 W / m2, reducing the recent global warming that would otherwise have occurred. (science.sciencemag.org)