INFLUENCE OF OCEANIC WHITECAPS ON ATMOSPHERIC CORRECTION OF OCEAN-COLOR SENSORS

The effects of oceanic whitecaps on ocean-color imagery are simulated and inserted into the proposed Sea-Viewing Wide-Field-of-View Sensor ( SeaWiFS) atmospheric-correction algorithm to understand its tolerance to error in the estimated whitecap contribution. The results suggest t hat for wind speeds less than or equal to 10-12 m/s, present models th at relate whitecap reflectance to wind speed are sufficiently accurate to meet the SeaWiFS accuracy goal for retrieval of the water-leaving radiance in the blue, when the aerosol scattering is weakly dependent on wavelength. In contrast, when the aerosol scattering has a strong s pectral signature, the retrievals will meet the goal only when the whi tecap reflectance is underestimated.