Land Surface Lambertian Equivalent Reflectivities (LER)


We use clear-sky data from the OMI satellite instrument to determine global surface reflectivity under both snow-covered and snow-free conditions. Clear-sky scenes are determined using cloud and aerosol data from the MODIS/Aqua satellite instrument that flies 12 minutes ahead of OMI/Aura. The result is a database of OMI-observed Lambertian equivalent reflectivity (LER) that does not rely on statistical methods to eliminate cloud and aerosol contamination.

References:
O’Byrne, G., R.V. Martin, A. van Donkelaar, J. Joiner and E.A. Celarier, Surface reflectivity from OMI using MODIS to eliminate clouds: Effects of snow on UV-Vis trace gas retrievals, J. Geophys. Res., 115, D17305, doi:10.1029/2009JD013079. [Full Text (PDF)]

Available Datasets:
Monthly mean surface LER at 354 nm [.zip] [README]
Snow-covered surface LER [.txt] [README]