I am looking for the forcing time series used in the historical runs of CMIP5. I found a lot of data in the official web site http://cmip-pcmdi.llnl.gov/cmip5/forcing.html but unfortunately "There are no emissions data currently available for natural aerosols (e.g., volcanic, sea salts, dust)". Does anyone know where I can download the volcanic aerosols data used in historical runs of CMIP5 ? Moreover is there a site where the forcing are translated in mean radiative forcing (at least for one model)?