| Summary: | Aerosols are one of the largest uncertainties in the climate research, due to our meager knowledge of these aerosols characteristics and their radiometric forcing effect on climatic system. In this paper, an innovative method for retrieval of aerosol optical thickness (AOT) from the top of the atmosphere (TOA) radiance of ENVISAT Advanced Along-Track Scanning Radiometer (AATSR) is presented which is inferred from radioactive transfer equation based on synergistic use of the multi-spectral and dual-angle view capabilities of AATSR and BRDF products from MODIS. The dual-angle 0.55-, 0.66-, and 0.87μm measurements from the AATSR onboard ENVISAT are used to retrieve AOT over land. Validation was performed over central European area and Beijing, China by comparison with AErosol RObotic NETwork (AERONET) ground-based Sun-photometer data.
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