The decrease in Earth’s reflectance from 1984 to 2000 translates into an albedo decrease equivalent to a forcing of 6.8W/m^2.
That is almost 3 times as much warming as claimed by the IPCC for warming caused by CO2 from 1850 – 2.4W/m^2.
http://hockeyschtick.blogspot.com/2011/05/study-finds-global-warming-from-natural.html
http://www.iac.es/galeria/epalle/reprints/Goode_Palle_JASTP_2007.pdf
sunshine hours 
This fits exactly with what both Roy Spencer and Henrik Svensmark have been saying, though they come at it from different angles (ENSO vs cosmic rays). Thanks for the link!