International Satellite Cloud Climatology Project (ISCCP): Solar Radiation and cloudiness

The data are here.

Variables

MEAN cld
mean cloudiness (fraction)
MONTHLY solr
solar radiation (W/m2)
MONTHLY cld
cloudiness (fraction)
Also see the ISCCP Home Page.

J.K.B. Bishop and W. B. Rossow, "Spatial and temporal variability of global surface solar irradiance," J. Geophys. Res., 96,16839-16858.

For a comparison of ISCCP and ERBE, see

R. Seager and M. B. Blumenthal, "Modeling tropical Pacific sea surface temperature with satellite-derived solar radiative forcing," J. Climate, 1994.