The direct effect of aerosols on solar radiation based on satellite observations, reanalysis datasets, and spectral aerosol optical properties from Global Aerosol Data Set (GADS)

1 Laboratory of Meteorology, Department of Physics, University of Ioannina, 45110 Ioannina, Greece 2 Foundation for Research and Technology-Hellas, Heraklion, Crete, Greece 3 Department of Environment, University of the Aegean, Mytilene, Greece 4 Department of Physics, University of Crete, Crete, Greece 5 Department of Electrical Engineering, Technological Educational Institute of Crete, Heraklion, Greece 6 Atmospheric Sciences, NASA Langley Research Center, Hampton, Virginia, USA 7 Meteorological Institute, University of Munich, Munich, Germany 8 Department of General Applied Science, Technological Educational Institute of Crete, Heraklion, Greece