A new approach to atmospheric correction of ocean color imagery based on radiative transfer modeling of the atmosphere-ocean system

摘要

Atmospheric correction of ocean color imagery is commonly based on twoassumptions: (i) the water-leaving radiance (L_w) at near-infrared (NIR) wavelengths is negligible; and (ii) the effects of the coupling at the atmosphere-ocean interface can be ignored. To investigate the validity of these two assumptions, we have carried out radiative transfer simulations using a radiative transfer code based on the discrete-ordinate method for a coupled atmosphere-ocean system, in which both reflection (including total reflection) and refraction at the atmosphere-ocean interface are taken into account. We assume that the atmosphere-ocean system is vertically stratified, and that the effects of whitecaps have been removed so as to leave behind a flat atmosphere-ocean interface.