AEROSOL OVER LAND WITH MERIS, PRESENT AND FUTURE

摘要

The surface reflectance for Vegetation is modeled in the blue (412 nm and 443 nm) and red (670 nm) in order to retrieve the aerosols. Preliminary results indicated that the extension of the initial Dense Dark Vegetation model substantially improved the aerosol remote sensing. Nevertheless, a tuning of the model parameters was required. The parameters of this reflectance model are adjusted thanks to the MODIS global albedo map. Evaluation of the AOTs demonstrated that the most reliable parameter is the AOT at 440nm which invites to replace by it the regular AOT 865 nm product. Large dispersions exist on the Angstrom coefficient which requires to improve the knowledge of the albedo mostly at 670 nm but also to less extend in the blue.